From 43a08bd29969be0f8b83a525b46cfa9e4b99e863 Mon Sep 17 00:00:00 2001
From: clubby789 <jamie@hill-daniel.co.uk>
Date: Mon, 16 Oct 2023 15:40:32 +0000
Subject: [PATCH 1/7] Add test for 113326

---
 .../type-alias-impl-trait/recursive-fn-tait.rs  | 17 +++++++++++++++++
 .../recursive-fn-tait.stderr                    | 14 ++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 tests/ui/type-alias-impl-trait/recursive-fn-tait.rs
 create mode 100644 tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr

diff --git a/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs b/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs
new file mode 100644
index 00000000000..3d1759097d6
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs
@@ -0,0 +1,17 @@
+// test for #113326
+#![feature(type_alias_impl_trait)]
+
+pub type Diff = impl Fn(usize) -> usize;
+
+pub fn lift() -> Diff {
+    |_: usize |loop {}
+}
+
+pub fn add(
+    n: Diff,
+    m: Diff,
+) -> Diff {
+    move |x: usize| m(n(x)) //~ ERROR: concrete type differs
+}
+
+fn main() {}
diff --git a/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr b/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr
new file mode 100644
index 00000000000..b2898a21190
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr
@@ -0,0 +1,14 @@
+error: concrete type differs from previous defining opaque type use
+  --> $DIR/recursive-fn-tait.rs:14:5
+   |
+LL |     move |x: usize| m(n(x))
+   |     ^^^^^^^^^^^^^^^^^^^^^^^ expected `{closure@$DIR/recursive-fn-tait.rs:7:5: 7:16}`, got `{closure@$DIR/recursive-fn-tait.rs:14:5: 14:20}`
+   |
+note: previous use here
+  --> $DIR/recursive-fn-tait.rs:7:5
+   |
+LL |     |_: usize |loop {}
+   |     ^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

From a947654a96651e3acc911fe202907b283cd2ed5b Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Tue, 24 Oct 2023 16:51:26 +0000
Subject: [PATCH 2/7] Merge impl_wf_inference into coherence checking

---
 compiler/rustc_hir_analysis/src/lib.rs        |  9 ++---
 .../in-trait/coherence-constrained.rs         | 26 +++++++++++++
 .../in-trait/coherence-constrained.stderr     | 25 +++++++++++++
 tests/ui/impl-unused-tps.rs                   |  5 ++-
 tests/ui/impl-unused-tps.stderr               | 37 +++++++++++++++----
 5 files changed, 87 insertions(+), 15 deletions(-)
 create mode 100644 tests/ui/async-await/in-trait/coherence-constrained.rs
 create mode 100644 tests/ui/async-await/in-trait/coherence-constrained.stderr

diff --git a/compiler/rustc_hir_analysis/src/lib.rs b/compiler/rustc_hir_analysis/src/lib.rs
index 0622aa2ee80..f27ce7fa0e0 100644
--- a/compiler/rustc_hir_analysis/src/lib.rs
+++ b/compiler/rustc_hir_analysis/src/lib.rs
@@ -181,14 +181,11 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
         })?;
     }
 
-    tcx.sess.track_errors(|| {
-        tcx.sess.time("impl_wf_inference", || {
-            tcx.hir().for_each_module(|module| tcx.ensure().check_mod_impl_wf(module))
-        });
-    })?;
-
     tcx.sess.track_errors(|| {
         tcx.sess.time("coherence_checking", || {
+            // Check impls constrain their parameters
+            tcx.hir().for_each_module(|module| tcx.ensure().check_mod_impl_wf(module));
+
             for &trait_def_id in tcx.all_local_trait_impls(()).keys() {
                 tcx.ensure().coherent_trait(trait_def_id);
             }
diff --git a/tests/ui/async-await/in-trait/coherence-constrained.rs b/tests/ui/async-await/in-trait/coherence-constrained.rs
new file mode 100644
index 00000000000..8e62b3e0e90
--- /dev/null
+++ b/tests/ui/async-await/in-trait/coherence-constrained.rs
@@ -0,0 +1,26 @@
+// edition: 2021
+
+trait Foo {
+    type T;
+
+    async fn foo(&self) -> Self::T;
+}
+
+struct Bar;
+
+impl Foo for Bar {
+    type T = ();
+
+    async fn foo(&self) {}
+    //~^ ERROR type annotations needed: cannot satisfy `<Bar as Foo>::T == ()`
+}
+
+impl Foo for Bar {
+    //~^ ERROR conflicting implementations of trait `Foo` for type `Bar`
+    type T = ();
+
+    async fn foo(&self) {}
+    //~^ ERROR type annotations needed: cannot satisfy `<Bar as Foo>::T == ()`
+}
+
+fn main() {}
diff --git a/tests/ui/async-await/in-trait/coherence-constrained.stderr b/tests/ui/async-await/in-trait/coherence-constrained.stderr
new file mode 100644
index 00000000000..570a357ca8f
--- /dev/null
+++ b/tests/ui/async-await/in-trait/coherence-constrained.stderr
@@ -0,0 +1,25 @@
+error[E0284]: type annotations needed: cannot satisfy `<Bar as Foo>::T == ()`
+  --> $DIR/coherence-constrained.rs:14:5
+   |
+LL |     async fn foo(&self) {}
+   |     ^^^^^^^^^^^^^^^^^^^ cannot satisfy `<Bar as Foo>::T == ()`
+
+error[E0284]: type annotations needed: cannot satisfy `<Bar as Foo>::T == ()`
+  --> $DIR/coherence-constrained.rs:22:5
+   |
+LL |     async fn foo(&self) {}
+   |     ^^^^^^^^^^^^^^^^^^^ cannot satisfy `<Bar as Foo>::T == ()`
+
+error[E0119]: conflicting implementations of trait `Foo` for type `Bar`
+  --> $DIR/coherence-constrained.rs:18:1
+   |
+LL | impl Foo for Bar {
+   | ---------------- first implementation here
+...
+LL | impl Foo for Bar {
+   | ^^^^^^^^^^^^^^^^ conflicting implementation for `Bar`
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0119, E0284.
+For more information about an error, try `rustc --explain E0119`.
diff --git a/tests/ui/impl-unused-tps.rs b/tests/ui/impl-unused-tps.rs
index 7cc1ae613bc..3eb9daedf76 100644
--- a/tests/ui/impl-unused-tps.rs
+++ b/tests/ui/impl-unused-tps.rs
@@ -1,3 +1,5 @@
+//~ ERROR overflow evaluating the requirement `([isize; 0], _): Sized
+
 trait Foo<A> {
     fn get(&self, A: &A) { }
 }
@@ -23,8 +25,7 @@ impl<T:Bar<Out=U>,U> Foo<T> for [isize;3] {
 }
 
 impl<T,U> Foo<T> for U {
-    // OK, T, U are used everywhere. Note that the coherence check
-    // hasn't executed yet, so no errors about overlap.
+    //~^ ERROR conflicting implementations of trait `Foo<_>` for type `[isize; 0]`
 }
 
 impl<T,U> Bar for T {
diff --git a/tests/ui/impl-unused-tps.stderr b/tests/ui/impl-unused-tps.stderr
index 053ab91c893..93215326c2f 100644
--- a/tests/ui/impl-unused-tps.stderr
+++ b/tests/ui/impl-unused-tps.stderr
@@ -1,33 +1,56 @@
 error[E0207]: the type parameter `U` is not constrained by the impl trait, self type, or predicates
-  --> $DIR/impl-unused-tps.rs:13:8
+  --> $DIR/impl-unused-tps.rs:15:8
    |
 LL | impl<T,U> Foo<T> for [isize;1] {
    |        ^ unconstrained type parameter
 
 error[E0207]: the type parameter `U` is not constrained by the impl trait, self type, or predicates
-  --> $DIR/impl-unused-tps.rs:30:8
+  --> $DIR/impl-unused-tps.rs:31:8
    |
 LL | impl<T,U> Bar for T {
    |        ^ unconstrained type parameter
 
 error[E0207]: the type parameter `U` is not constrained by the impl trait, self type, or predicates
-  --> $DIR/impl-unused-tps.rs:38:8
+  --> $DIR/impl-unused-tps.rs:39:8
    |
 LL | impl<T,U> Bar for T
    |        ^ unconstrained type parameter
 
 error[E0207]: the type parameter `U` is not constrained by the impl trait, self type, or predicates
-  --> $DIR/impl-unused-tps.rs:46:8
+  --> $DIR/impl-unused-tps.rs:47:8
    |
 LL | impl<T,U,V> Foo<T> for T
    |        ^ unconstrained type parameter
 
 error[E0207]: the type parameter `V` is not constrained by the impl trait, self type, or predicates
-  --> $DIR/impl-unused-tps.rs:46:10
+  --> $DIR/impl-unused-tps.rs:47:10
    |
 LL | impl<T,U,V> Foo<T> for T
    |          ^ unconstrained type parameter
 
-error: aborting due to 5 previous errors
+error[E0119]: conflicting implementations of trait `Foo<_>` for type `[isize; 0]`
+  --> $DIR/impl-unused-tps.rs:27:1
+   |
+LL | impl<T> Foo<T> for [isize;0] {
+   | ---------------------------- first implementation here
+...
+LL | impl<T,U> Foo<T> for U {
+   | ^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `[isize; 0]`
 
-For more information about this error, try `rustc --explain E0207`.
+error[E0275]: overflow evaluating the requirement `([isize; 0], _): Sized`
+   |
+   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`impl_unused_tps`)
+note: required for `([isize; 0], _)` to implement `Bar`
+  --> $DIR/impl-unused-tps.rs:31:11
+   |
+LL | impl<T,U> Bar for T {
+   |      -    ^^^     ^
+   |      |
+   |      unsatisfied trait bound introduced here
+   = note: 126 redundant requirements hidden
+   = note: required for `([isize; 0], _)` to implement `Bar`
+
+error: aborting due to 7 previous errors
+
+Some errors have detailed explanations: E0119, E0207, E0275.
+For more information about an error, try `rustc --explain E0119`.

From 18b7d9eb8ce272713de56c02cd350665b5b1ff57 Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Wed, 18 Oct 2023 19:28:46 +0000
Subject: [PATCH 3/7] Intern LocalDefId list from opaque query

---
 compiler/rustc_middle/src/query/mod.rs      |  2 +-
 compiler/rustc_middle/src/ty/context.rs     | 10 ++++++++++
 compiler/rustc_ty_utils/src/opaque_types.rs |  7 +++++--
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 340c5a769db..8bea404ccf2 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -339,7 +339,7 @@ rustc_queries! {
 
     query opaque_types_defined_by(
         key: LocalDefId
-    ) -> &'tcx [LocalDefId] {
+    ) -> &'tcx ty::List<LocalDefId> {
         desc {
             |tcx| "computing the opaque types defined by `{}`",
             tcx.def_path_str(key.to_def_id())
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index f7bce93fee5..80620efb0b3 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -157,6 +157,7 @@ pub struct CtxtInterners<'tcx> {
     external_constraints: InternedSet<'tcx, ExternalConstraintsData<'tcx>>,
     predefined_opaques_in_body: InternedSet<'tcx, PredefinedOpaquesData<'tcx>>,
     fields: InternedSet<'tcx, List<FieldIdx>>,
+    local_def_ids: InternedSet<'tcx, List<LocalDefId>>,
 }
 
 impl<'tcx> CtxtInterners<'tcx> {
@@ -182,6 +183,7 @@ impl<'tcx> CtxtInterners<'tcx> {
             external_constraints: Default::default(),
             predefined_opaques_in_body: Default::default(),
             fields: Default::default(),
+            local_def_ids: Default::default(),
         }
     }
 
@@ -1568,6 +1570,7 @@ slice_interners!(
     place_elems: pub mk_place_elems(PlaceElem<'tcx>),
     bound_variable_kinds: pub mk_bound_variable_kinds(ty::BoundVariableKind),
     fields: pub mk_fields(FieldIdx),
+    local_def_ids: intern_local_def_ids(LocalDefId),
 );
 
 impl<'tcx> TyCtxt<'tcx> {
@@ -1798,6 +1801,13 @@ impl<'tcx> TyCtxt<'tcx> {
         self.intern_clauses(clauses)
     }
 
+    pub fn mk_local_def_ids(self, clauses: &[LocalDefId]) -> &'tcx List<LocalDefId> {
+        // FIXME consider asking the input slice to be sorted to avoid
+        // re-interning permutations, in which case that would be asserted
+        // here.
+        self.intern_local_def_ids(clauses)
+    }
+
     pub fn mk_const_list_from_iter<I, T>(self, iter: I) -> T::Output
     where
         I: Iterator<Item = T>,
diff --git a/compiler/rustc_ty_utils/src/opaque_types.rs b/compiler/rustc_ty_utils/src/opaque_types.rs
index 06a30677d20..82c4f38511e 100644
--- a/compiler/rustc_ty_utils/src/opaque_types.rs
+++ b/compiler/rustc_ty_utils/src/opaque_types.rs
@@ -269,7 +269,10 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for OpaqueTypeCollector<'tcx> {
     }
 }
 
-fn opaque_types_defined_by<'tcx>(tcx: TyCtxt<'tcx>, item: LocalDefId) -> &'tcx [LocalDefId] {
+fn opaque_types_defined_by<'tcx>(
+    tcx: TyCtxt<'tcx>,
+    item: LocalDefId,
+) -> &'tcx ty::List<LocalDefId> {
     let kind = tcx.def_kind(item);
     trace!(?kind);
     let mut collector = OpaqueTypeCollector::new(tcx, item);
@@ -327,7 +330,7 @@ fn opaque_types_defined_by<'tcx>(tcx: TyCtxt<'tcx>, item: LocalDefId) -> &'tcx [
             return tcx.opaque_types_defined_by(tcx.local_parent(item));
         }
     }
-    tcx.arena.alloc_from_iter(collector.opaques)
+    tcx.mk_local_def_ids(&collector.opaques)
 }
 
 pub(super) fn provide(providers: &mut Providers) {

From fd7bbc2aa506042e807ce3a63561fabf2ca94a6b Mon Sep 17 00:00:00 2001
From: Weihang Lo <me@weihanglo.tw>
Date: Tue, 24 Oct 2023 20:51:13 -0400
Subject: [PATCH 4/7] Update cargo

---
 src/tools/cargo | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tools/cargo b/src/tools/cargo
index d2f6a048529..df350923793 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit d2f6a048529eb8e9ebc55d793abd63456c98fac2
+Subproject commit df3509237935f9418351b77803df7bc05c009b3d

From dc3d428a8a4771342fb76a4c7fa83569ac05c433 Mon Sep 17 00:00:00 2001
From: Matthew Jasper <mjjasper1@gmail.com>
Date: Wed, 25 Oct 2023 09:38:37 +0000
Subject: [PATCH 5/7] Make THIR unused_unsafe lint consistent with MIR

Updates THIR behavior to match the changes from #93678
---
 compiler/rustc_mir_build/messages.ftl         |    1 -
 .../rustc_mir_build/src/check_unsafety.rs     |  152 +-
 compiler/rustc_mir_build/src/errors.rs        |    5 -
 compiler/rustc_mir_build/src/lib.rs           |    2 +-
 tests/ui/inline-const/expr-unsafe.thir.stderr |    3 -
 tests/ui/inline-const/pat-unsafe.thir.stderr  |    6 -
 tests/ui/span/lint-unused-unsafe-thir.rs      |   61 -
 tests/ui/span/lint-unused-unsafe-thir.stderr  |   50 -
 tests/ui/span/lint-unused-unsafe.mir.stderr   |  376 ++---
 tests/ui/span/lint-unused-unsafe.rs           |    8 +-
 tests/ui/span/lint-unused-unsafe.thir.stderr  | 1402 +++++++++++++++++
 ...-unnecessary-unsafe-in-closure.thir.stderr |    6 +-
 ...fc-2585-unsafe_op_in_unsafe_fn.thir.stderr |    6 +-
 13 files changed, 1683 insertions(+), 395 deletions(-)
 delete mode 100644 tests/ui/span/lint-unused-unsafe-thir.rs
 delete mode 100644 tests/ui/span/lint-unused-unsafe-thir.stderr
 create mode 100644 tests/ui/span/lint-unused-unsafe.thir.stderr

diff --git a/compiler/rustc_mir_build/messages.ftl b/compiler/rustc_mir_build/messages.ftl
index db3886b32be..32711c23dc4 100644
--- a/compiler/rustc_mir_build/messages.ftl
+++ b/compiler/rustc_mir_build/messages.ftl
@@ -379,6 +379,5 @@ mir_build_unused_unsafe = unnecessary `unsafe` block
     .label = unnecessary `unsafe` block
 
 mir_build_unused_unsafe_enclosing_block_label = because it's nested under this `unsafe` block
-mir_build_unused_unsafe_enclosing_fn_label = because it's nested under this `unsafe` fn
 
 mir_build_variant_defined_here = not covered
diff --git a/compiler/rustc_mir_build/src/check_unsafety.rs b/compiler/rustc_mir_build/src/check_unsafety.rs
index 3265f92e514..45be5015371 100644
--- a/compiler/rustc_mir_build/src/check_unsafety.rs
+++ b/compiler/rustc_mir_build/src/check_unsafety.rs
@@ -13,6 +13,7 @@ use rustc_span::def_id::{DefId, LocalDefId};
 use rustc_span::symbol::Symbol;
 use rustc_span::Span;
 
+use std::mem;
 use std::ops::Bound;
 
 struct UnsafetyVisitor<'a, 'tcx> {
@@ -24,7 +25,6 @@ struct UnsafetyVisitor<'a, 'tcx> {
     /// The current "safety context". This notably tracks whether we are in an
     /// `unsafe` block, and whether it has been used.
     safety_context: SafetyContext,
-    body_unsafety: BodyUnsafety,
     /// The `#[target_feature]` attributes of the body. Used for checking
     /// calls to functions with `#[target_feature]` (RFC 2396).
     body_target_features: &'tcx [Symbol],
@@ -34,43 +34,50 @@ struct UnsafetyVisitor<'a, 'tcx> {
     in_union_destructure: bool,
     param_env: ParamEnv<'tcx>,
     inside_adt: bool,
+    warnings: &'a mut Vec<UnusedUnsafeWarning>,
 }
 
 impl<'tcx> UnsafetyVisitor<'_, 'tcx> {
     fn in_safety_context(&mut self, safety_context: SafetyContext, f: impl FnOnce(&mut Self)) {
-        if let (
-            SafetyContext::UnsafeBlock { span: enclosing_span, .. },
-            SafetyContext::UnsafeBlock { span: block_span, hir_id, .. },
-        ) = (self.safety_context, safety_context)
+        let prev_context = mem::replace(&mut self.safety_context, safety_context);
+
+        f(self);
+
+        let safety_context = mem::replace(&mut self.safety_context, prev_context);
+        if let SafetyContext::UnsafeBlock { used, span, hir_id, nested_used_blocks } =
+            safety_context
         {
-            self.warn_unused_unsafe(
-                hir_id,
-                block_span,
-                Some(UnusedUnsafeEnclosing::Block {
-                    span: self.tcx.sess.source_map().guess_head_span(enclosing_span),
-                }),
-            );
-            f(self);
-        } else {
-            let prev_context = self.safety_context;
-            self.safety_context = safety_context;
+            if !used {
+                self.warn_unused_unsafe(hir_id, span, None);
 
-            f(self);
+                if let SafetyContext::UnsafeBlock {
+                    nested_used_blocks: ref mut prev_nested_used_blocks,
+                    ..
+                } = self.safety_context
+                {
+                    prev_nested_used_blocks.extend(nested_used_blocks);
+                }
+            } else {
+                for block in nested_used_blocks {
+                    self.warn_unused_unsafe(
+                        block.hir_id,
+                        block.span,
+                        Some(UnusedUnsafeEnclosing::Block {
+                            span: self.tcx.sess.source_map().guess_head_span(span),
+                        }),
+                    );
+                }
 
-            if let SafetyContext::UnsafeBlock { used: false, span, hir_id } = self.safety_context {
-                self.warn_unused_unsafe(
-                    hir_id,
-                    span,
-                    if self.unsafe_op_in_unsafe_fn_allowed() {
-                        self.body_unsafety
-                            .unsafe_fn_sig_span()
-                            .map(|span| UnusedUnsafeEnclosing::Function { span })
-                    } else {
-                        None
-                    },
-                );
+                match self.safety_context {
+                    SafetyContext::UnsafeBlock {
+                        nested_used_blocks: ref mut prev_nested_used_blocks,
+                        ..
+                    } => {
+                        prev_nested_used_blocks.push(NestedUsedBlock { hir_id, span });
+                    }
+                    _ => (),
+                }
             }
-            self.safety_context = prev_context;
         }
     }
 
@@ -102,18 +109,12 @@ impl<'tcx> UnsafetyVisitor<'_, 'tcx> {
     }
 
     fn warn_unused_unsafe(
-        &self,
+        &mut self,
         hir_id: hir::HirId,
         block_span: Span,
         enclosing_unsafe: Option<UnusedUnsafeEnclosing>,
     ) {
-        let block_span = self.tcx.sess.source_map().guess_head_span(block_span);
-        self.tcx.emit_spanned_lint(
-            UNUSED_UNSAFE,
-            hir_id,
-            block_span,
-            UnusedUnsafe { span: block_span, enclosing: enclosing_unsafe },
-        );
+        self.warnings.push(UnusedUnsafeWarning { hir_id, block_span, enclosing_unsafe });
     }
 
     /// Whether the `unsafe_op_in_unsafe_fn` lint is `allow`ed at the current HIR node.
@@ -128,7 +129,14 @@ impl<'tcx> UnsafetyVisitor<'_, 'tcx> {
             self.tcx.ensure_with_value().mir_built(def);
             let inner_thir = &inner_thir.steal();
             let hir_context = self.tcx.hir().local_def_id_to_hir_id(def);
-            let mut inner_visitor = UnsafetyVisitor { thir: inner_thir, hir_context, ..*self };
+            let safety_context = mem::replace(&mut self.safety_context, SafetyContext::Safe);
+            let mut inner_visitor = UnsafetyVisitor {
+                thir: inner_thir,
+                hir_context,
+                safety_context,
+                warnings: self.warnings,
+                ..*self
+            };
             inner_visitor.visit_expr(&inner_thir[expr]);
             // Unsafe blocks can be used in the inner body, make sure to take it into account
             self.safety_context = inner_visitor.safety_context;
@@ -195,8 +203,15 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
                 });
             }
             BlockSafety::ExplicitUnsafe(hir_id) => {
+                let used =
+                    matches!(self.tcx.lint_level_at_node(UNUSED_UNSAFE, hir_id), (Level::Allow, _));
                 self.in_safety_context(
-                    SafetyContext::UnsafeBlock { span: block.span, hir_id, used: false },
+                    SafetyContext::UnsafeBlock {
+                        span: block.span,
+                        hir_id,
+                        used,
+                        nested_used_blocks: Vec::new(),
+                    },
                     |this| visit::walk_block(this, block),
                 );
             }
@@ -481,36 +496,29 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
     }
 }
 
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 enum SafetyContext {
     Safe,
     BuiltinUnsafeBlock,
     UnsafeFn,
-    UnsafeBlock { span: Span, hir_id: hir::HirId, used: bool },
+    UnsafeBlock {
+        span: Span,
+        hir_id: hir::HirId,
+        used: bool,
+        nested_used_blocks: Vec<NestedUsedBlock>,
+    },
 }
 
 #[derive(Clone, Copy)]
-enum BodyUnsafety {
-    /// The body is not unsafe.
-    Safe,
-    /// The body is an unsafe function. The span points to
-    /// the signature of the function.
-    Unsafe(Span),
+struct NestedUsedBlock {
+    hir_id: hir::HirId,
+    span: Span,
 }
 
-impl BodyUnsafety {
-    /// Returns whether the body is unsafe.
-    fn is_unsafe(&self) -> bool {
-        matches!(self, BodyUnsafety::Unsafe(_))
-    }
-
-    /// If the body is unsafe, returns the `Span` of its signature.
-    fn unsafe_fn_sig_span(self) -> Option<Span> {
-        match self {
-            BodyUnsafety::Unsafe(span) => Some(span),
-            BodyUnsafety::Safe => None,
-        }
-    }
+struct UnusedUnsafeWarning {
+    hir_id: hir::HirId,
+    block_span: Span,
+    enclosing_unsafe: Option<UnusedUnsafeEnclosing>,
 }
 
 #[derive(Clone, Copy, PartialEq)]
@@ -803,27 +811,37 @@ pub fn thir_check_unsafety(tcx: TyCtxt<'_>, def: LocalDefId) {
     }
 
     let hir_id = tcx.hir().local_def_id_to_hir_id(def);
-    let body_unsafety = tcx.hir().fn_sig_by_hir_id(hir_id).map_or(BodyUnsafety::Safe, |fn_sig| {
+    let safety_context = tcx.hir().fn_sig_by_hir_id(hir_id).map_or(SafetyContext::Safe, |fn_sig| {
         if fn_sig.header.unsafety == hir::Unsafety::Unsafe {
-            BodyUnsafety::Unsafe(fn_sig.span)
+            SafetyContext::UnsafeFn
         } else {
-            BodyUnsafety::Safe
+            SafetyContext::Safe
         }
     });
     let body_target_features = &tcx.body_codegen_attrs(def.to_def_id()).target_features;
-    let safety_context =
-        if body_unsafety.is_unsafe() { SafetyContext::UnsafeFn } else { SafetyContext::Safe };
+    let mut warnings = Vec::new();
     let mut visitor = UnsafetyVisitor {
         tcx,
         thir,
         safety_context,
         hir_context: hir_id,
-        body_unsafety,
         body_target_features,
         assignment_info: None,
         in_union_destructure: false,
         param_env: tcx.param_env(def),
         inside_adt: false,
+        warnings: &mut warnings,
     };
     visitor.visit_expr(&thir[expr]);
+
+    warnings.sort_by_key(|w| w.block_span);
+    for UnusedUnsafeWarning { hir_id, block_span, enclosing_unsafe } in warnings {
+        let block_span = tcx.sess.source_map().guess_head_span(block_span);
+        tcx.emit_spanned_lint(
+            UNUSED_UNSAFE,
+            hir_id,
+            block_span,
+            UnusedUnsafe { span: block_span, enclosing: enclosing_unsafe },
+        );
+    }
 }
diff --git a/compiler/rustc_mir_build/src/errors.rs b/compiler/rustc_mir_build/src/errors.rs
index c09dd186418..730670a8369 100644
--- a/compiler/rustc_mir_build/src/errors.rs
+++ b/compiler/rustc_mir_build/src/errors.rs
@@ -392,11 +392,6 @@ pub enum UnusedUnsafeEnclosing {
         #[primary_span]
         span: Span,
     },
-    #[label(mir_build_unused_unsafe_enclosing_fn_label)]
-    Function {
-        #[primary_span]
-        span: Span,
-    },
 }
 
 pub(crate) struct NonExhaustivePatternsTypeNotEmpty<'p, 'tcx, 'm> {
diff --git a/compiler/rustc_mir_build/src/lib.rs b/compiler/rustc_mir_build/src/lib.rs
index 099fefbf068..745c3046d22 100644
--- a/compiler/rustc_mir_build/src/lib.rs
+++ b/compiler/rustc_mir_build/src/lib.rs
@@ -20,7 +20,7 @@ mod build;
 mod check_unsafety;
 mod errors;
 pub mod lints;
-pub mod thir;
+mod thir;
 
 use rustc_middle::query::Providers;
 
diff --git a/tests/ui/inline-const/expr-unsafe.thir.stderr b/tests/ui/inline-const/expr-unsafe.thir.stderr
index 4737444fb61..1ab6e42fba0 100644
--- a/tests/ui/inline-const/expr-unsafe.thir.stderr
+++ b/tests/ui/inline-const/expr-unsafe.thir.stderr
@@ -1,9 +1,6 @@
 warning: unnecessary `unsafe` block
   --> $DIR/expr-unsafe.rs:12:13
    |
-LL |     unsafe {
-   |     ------ because it's nested under this `unsafe` block
-...
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
    |
diff --git a/tests/ui/inline-const/pat-unsafe.thir.stderr b/tests/ui/inline-const/pat-unsafe.thir.stderr
index d62c87fc8f3..0318b3ff2cc 100644
--- a/tests/ui/inline-const/pat-unsafe.thir.stderr
+++ b/tests/ui/inline-const/pat-unsafe.thir.stderr
@@ -1,9 +1,6 @@
 warning: unnecessary `unsafe` block
   --> $DIR/pat-unsafe.rs:19:17
    |
-LL |     unsafe {
-   |     ------ because it's nested under this `unsafe` block
-...
 LL |                 unsafe {}
    |                 ^^^^^^ unnecessary `unsafe` block
    |
@@ -16,9 +13,6 @@ LL | #![warn(unused_unsafe)]
 warning: unnecessary `unsafe` block
   --> $DIR/pat-unsafe.rs:26:17
    |
-LL |     unsafe {
-   |     ------ because it's nested under this `unsafe` block
-...
 LL |                 unsafe {}
    |                 ^^^^^^ unnecessary `unsafe` block
 
diff --git a/tests/ui/span/lint-unused-unsafe-thir.rs b/tests/ui/span/lint-unused-unsafe-thir.rs
deleted file mode 100644
index adb72c26bba..00000000000
--- a/tests/ui/span/lint-unused-unsafe-thir.rs
+++ /dev/null
@@ -1,61 +0,0 @@
-// FIXME: This file is tracking old lint behavior that's still unchanged in the
-// unstable -Zthir-unsafeck implementation. See lint-unused-unsafe.rs for more details.
-//
-// Exercise the unused_unsafe attribute in some positive and negative cases
-
-// compile-flags: -Zthir-unsafeck
-
-#![allow(dead_code)]
-#![deny(unused_unsafe)]
-
-
-mod foo {
-    extern "C" {
-        pub fn bar();
-    }
-}
-
-fn callback<T, F>(_f: F) -> T where F: FnOnce() -> T { panic!() }
-unsafe fn unsf() {}
-
-fn bad1() { unsafe {} }                  //~ ERROR: unnecessary `unsafe` block
-fn bad2() { unsafe { bad1() } }          //~ ERROR: unnecessary `unsafe` block
-unsafe fn bad3() { unsafe {} }           //~ ERROR: unnecessary `unsafe` block
-fn bad4() { unsafe { callback(||{}) } }  //~ ERROR: unnecessary `unsafe` block
-unsafe fn bad5() { unsafe { unsf() } }
-fn bad6() {
-    unsafe {                             // don't put the warning here
-        unsafe {                         //~ ERROR: unnecessary `unsafe` block
-            unsf()
-        }
-    }
-}
-unsafe fn bad7() {
-    unsafe {
-        unsafe {                         //~ ERROR: unnecessary `unsafe` block
-            unsf()
-        }
-    }
-}
-
-unsafe fn good0() { unsf() }
-fn good1() { unsafe { unsf() } }
-fn good2() {
-    /* bug uncovered when implementing warning about unused unsafe blocks. Be
-       sure that when purity is inherited that the source of the unsafe-ness
-       is tracked correctly */
-    unsafe {
-        unsafe fn what() -> Vec<String> { panic!() }
-
-        callback(|| {
-            what();
-        });
-    }
-}
-
-unsafe fn good3() { foo::bar() }
-fn good4() { unsafe { foo::bar() } }
-
-#[allow(unused_unsafe)] fn allowed() { unsafe {} }
-
-fn main() {}
diff --git a/tests/ui/span/lint-unused-unsafe-thir.stderr b/tests/ui/span/lint-unused-unsafe-thir.stderr
deleted file mode 100644
index 3bcbb759775..00000000000
--- a/tests/ui/span/lint-unused-unsafe-thir.stderr
+++ /dev/null
@@ -1,50 +0,0 @@
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:21:13
-   |
-LL | fn bad1() { unsafe {} }
-   |             ^^^^^^ unnecessary `unsafe` block
-   |
-note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe-thir.rs:9:9
-   |
-LL | #![deny(unused_unsafe)]
-   |         ^^^^^^^^^^^^^
-
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:22:13
-   |
-LL | fn bad2() { unsafe { bad1() } }
-   |             ^^^^^^ unnecessary `unsafe` block
-
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:23:20
-   |
-LL | unsafe fn bad3() { unsafe {} }
-   | ----------------   ^^^^^^ unnecessary `unsafe` block
-   | |
-   | because it's nested under this `unsafe` fn
-
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:24:13
-   |
-LL | fn bad4() { unsafe { callback(||{}) } }
-   |             ^^^^^^ unnecessary `unsafe` block
-
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:28:9
-   |
-LL |     unsafe {                             // don't put the warning here
-   |     ------ because it's nested under this `unsafe` block
-LL |         unsafe {
-   |         ^^^^^^ unnecessary `unsafe` block
-
-error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe-thir.rs:35:9
-   |
-LL |     unsafe {
-   |     ------ because it's nested under this `unsafe` block
-LL |         unsafe {
-   |         ^^^^^^ unnecessary `unsafe` block
-
-error: aborting due to 6 previous errors
-
diff --git a/tests/ui/span/lint-unused-unsafe.mir.stderr b/tests/ui/span/lint-unused-unsafe.mir.stderr
index d8412908c73..9e8d3359242 100644
--- a/tests/ui/span/lint-unused-unsafe.mir.stderr
+++ b/tests/ui/span/lint-unused-unsafe.mir.stderr
@@ -1,77 +1,77 @@
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:26:13
+  --> $DIR/lint-unused-unsafe.rs:22:13
    |
 LL | fn bad1() { unsafe {} }
    |             ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:14:9
+  --> $DIR/lint-unused-unsafe.rs:10:9
    |
 LL | #![deny(unused_unsafe)]
    |         ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:27:13
+  --> $DIR/lint-unused-unsafe.rs:23:13
    |
 LL | fn bad2() { unsafe { bad1() } }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:28:20
+  --> $DIR/lint-unused-unsafe.rs:24:20
    |
 LL | unsafe fn bad3() { unsafe {} }
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:29:13
+  --> $DIR/lint-unused-unsafe.rs:25:13
    |
 LL | fn bad4() { unsafe { callback(||{}) } }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:32:5
+  --> $DIR/lint-unused-unsafe.rs:28:5
    |
 LL |     unsafe {
    |     ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:39:5
+  --> $DIR/lint-unused-unsafe.rs:35:5
    |
 LL |     unsafe {
    |     ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:74:9
+  --> $DIR/lint-unused-unsafe.rs:70:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:83:9
+  --> $DIR/lint-unused-unsafe.rs:79:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:84:13
+  --> $DIR/lint-unused-unsafe.rs:80:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:85:13
+  --> $DIR/lint-unused-unsafe.rs:81:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:90:9
+  --> $DIR/lint-unused-unsafe.rs:86:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:100:13
+  --> $DIR/lint-unused-unsafe.rs:96:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -80,7 +80,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:101:13
+  --> $DIR/lint-unused-unsafe.rs:97:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -89,7 +89,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:102:13
+  --> $DIR/lint-unused-unsafe.rs:98:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -98,7 +98,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:112:17
+  --> $DIR/lint-unused-unsafe.rs:108:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -107,13 +107,13 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:110:20
+  --> $DIR/lint-unused-unsafe.rs:106:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:113:17
+  --> $DIR/lint-unused-unsafe.rs:109:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -122,7 +122,7 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:114:17
+  --> $DIR/lint-unused-unsafe.rs:110:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -131,37 +131,37 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:124:9
+  --> $DIR/lint-unused-unsafe.rs:120:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:134:9
+  --> $DIR/lint-unused-unsafe.rs:130:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:135:13
+  --> $DIR/lint-unused-unsafe.rs:131:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:136:13
+  --> $DIR/lint-unused-unsafe.rs:132:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:142:9
+  --> $DIR/lint-unused-unsafe.rs:138:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:153:13
+  --> $DIR/lint-unused-unsafe.rs:149:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -170,7 +170,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:154:13
+  --> $DIR/lint-unused-unsafe.rs:150:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -179,7 +179,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:155:13
+  --> $DIR/lint-unused-unsafe.rs:151:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -188,7 +188,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:166:17
+  --> $DIR/lint-unused-unsafe.rs:162:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -197,13 +197,13 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:164:20
+  --> $DIR/lint-unused-unsafe.rs:160:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:167:17
+  --> $DIR/lint-unused-unsafe.rs:163:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -212,7 +212,7 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:168:17
+  --> $DIR/lint-unused-unsafe.rs:164:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -221,37 +221,37 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:178:9
+  --> $DIR/lint-unused-unsafe.rs:174:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:188:9
+  --> $DIR/lint-unused-unsafe.rs:184:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:189:13
+  --> $DIR/lint-unused-unsafe.rs:185:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:190:13
+  --> $DIR/lint-unused-unsafe.rs:186:13
    |
 LL |             unsafe {}
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:196:9
+  --> $DIR/lint-unused-unsafe.rs:192:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:207:13
+  --> $DIR/lint-unused-unsafe.rs:203:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -260,7 +260,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:208:13
+  --> $DIR/lint-unused-unsafe.rs:204:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -269,7 +269,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:209:13
+  --> $DIR/lint-unused-unsafe.rs:205:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -278,7 +278,7 @@ LL |             unsafe { unsf() }
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:220:17
+  --> $DIR/lint-unused-unsafe.rs:216:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -287,13 +287,13 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:218:20
+  --> $DIR/lint-unused-unsafe.rs:214:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:221:17
+  --> $DIR/lint-unused-unsafe.rs:217:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -302,7 +302,7 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:222:17
+  --> $DIR/lint-unused-unsafe.rs:218:17
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -311,13 +311,13 @@ LL |                 unsafe { unsf() }
    |                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:242:9
+  --> $DIR/lint-unused-unsafe.rs:238:9
    |
 LL |         unsafe {
    |         ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:255:13
+  --> $DIR/lint-unused-unsafe.rs:251:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -325,7 +325,7 @@ LL |             unsafe {
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:268:13
+  --> $DIR/lint-unused-unsafe.rs:264:13
    |
 LL |         unsafe {
    |         ------ because it's nested under this `unsafe` block
@@ -333,37 +333,37 @@ LL |             unsafe {
    |             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:286:20
+  --> $DIR/lint-unused-unsafe.rs:282:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:295:20
+  --> $DIR/lint-unused-unsafe.rs:291:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:296:24
+  --> $DIR/lint-unused-unsafe.rs:292:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:297:24
+  --> $DIR/lint-unused-unsafe.rs:293:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:302:20
+  --> $DIR/lint-unused-unsafe.rs:298:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:312:24
+  --> $DIR/lint-unused-unsafe.rs:308:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -372,7 +372,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:313:24
+  --> $DIR/lint-unused-unsafe.rs:309:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -381,7 +381,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:314:24
+  --> $DIR/lint-unused-unsafe.rs:310:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -390,7 +390,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:324:28
+  --> $DIR/lint-unused-unsafe.rs:320:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -399,13 +399,13 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:322:20
+  --> $DIR/lint-unused-unsafe.rs:318:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:325:28
+  --> $DIR/lint-unused-unsafe.rs:321:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -414,7 +414,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:326:28
+  --> $DIR/lint-unused-unsafe.rs:322:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -423,37 +423,37 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:336:20
+  --> $DIR/lint-unused-unsafe.rs:332:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:346:20
+  --> $DIR/lint-unused-unsafe.rs:342:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:347:24
+  --> $DIR/lint-unused-unsafe.rs:343:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:348:24
+  --> $DIR/lint-unused-unsafe.rs:344:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:354:20
+  --> $DIR/lint-unused-unsafe.rs:350:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:365:24
+  --> $DIR/lint-unused-unsafe.rs:361:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -462,7 +462,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:366:24
+  --> $DIR/lint-unused-unsafe.rs:362:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -471,7 +471,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:367:24
+  --> $DIR/lint-unused-unsafe.rs:363:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -480,7 +480,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:378:28
+  --> $DIR/lint-unused-unsafe.rs:374:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -489,13 +489,13 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:376:20
+  --> $DIR/lint-unused-unsafe.rs:372:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:379:28
+  --> $DIR/lint-unused-unsafe.rs:375:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -504,7 +504,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:380:28
+  --> $DIR/lint-unused-unsafe.rs:376:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -513,37 +513,37 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:390:20
+  --> $DIR/lint-unused-unsafe.rs:386:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:400:20
+  --> $DIR/lint-unused-unsafe.rs:396:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:401:24
+  --> $DIR/lint-unused-unsafe.rs:397:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:402:24
+  --> $DIR/lint-unused-unsafe.rs:398:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:408:20
+  --> $DIR/lint-unused-unsafe.rs:404:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:419:24
+  --> $DIR/lint-unused-unsafe.rs:415:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -552,7 +552,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:420:24
+  --> $DIR/lint-unused-unsafe.rs:416:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -561,7 +561,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:421:24
+  --> $DIR/lint-unused-unsafe.rs:417:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -570,7 +570,7 @@ LL |             let _ = || unsafe { unsf() };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:432:28
+  --> $DIR/lint-unused-unsafe.rs:428:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -579,13 +579,13 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:430:20
+  --> $DIR/lint-unused-unsafe.rs:426:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:433:28
+  --> $DIR/lint-unused-unsafe.rs:429:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -594,7 +594,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:434:28
+  --> $DIR/lint-unused-unsafe.rs:430:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -603,13 +603,13 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:454:20
+  --> $DIR/lint-unused-unsafe.rs:450:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:467:24
+  --> $DIR/lint-unused-unsafe.rs:463:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -617,7 +617,7 @@ LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:480:24
+  --> $DIR/lint-unused-unsafe.rs:476:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -625,37 +625,37 @@ LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:499:20
+  --> $DIR/lint-unused-unsafe.rs:495:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:508:20
+  --> $DIR/lint-unused-unsafe.rs:504:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:509:24
+  --> $DIR/lint-unused-unsafe.rs:505:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:510:24
+  --> $DIR/lint-unused-unsafe.rs:506:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:515:20
+  --> $DIR/lint-unused-unsafe.rs:511:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:525:24
+  --> $DIR/lint-unused-unsafe.rs:521:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -664,7 +664,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:526:24
+  --> $DIR/lint-unused-unsafe.rs:522:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -673,7 +673,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:527:24
+  --> $DIR/lint-unused-unsafe.rs:523:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -682,7 +682,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:537:28
+  --> $DIR/lint-unused-unsafe.rs:533:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -691,13 +691,13 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:535:20
+  --> $DIR/lint-unused-unsafe.rs:531:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:538:28
+  --> $DIR/lint-unused-unsafe.rs:534:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -706,7 +706,7 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:539:28
+  --> $DIR/lint-unused-unsafe.rs:535:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -715,37 +715,37 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:549:20
+  --> $DIR/lint-unused-unsafe.rs:545:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:559:20
+  --> $DIR/lint-unused-unsafe.rs:555:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:560:24
+  --> $DIR/lint-unused-unsafe.rs:556:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:561:24
+  --> $DIR/lint-unused-unsafe.rs:557:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:567:20
+  --> $DIR/lint-unused-unsafe.rs:563:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:578:24
+  --> $DIR/lint-unused-unsafe.rs:574:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -754,7 +754,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:579:24
+  --> $DIR/lint-unused-unsafe.rs:575:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -763,7 +763,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:580:24
+  --> $DIR/lint-unused-unsafe.rs:576:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -772,7 +772,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:591:28
+  --> $DIR/lint-unused-unsafe.rs:587:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -781,13 +781,13 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:589:20
+  --> $DIR/lint-unused-unsafe.rs:585:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:592:28
+  --> $DIR/lint-unused-unsafe.rs:588:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -796,7 +796,7 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:593:28
+  --> $DIR/lint-unused-unsafe.rs:589:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -805,37 +805,37 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:603:20
+  --> $DIR/lint-unused-unsafe.rs:599:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:613:20
+  --> $DIR/lint-unused-unsafe.rs:609:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:614:24
+  --> $DIR/lint-unused-unsafe.rs:610:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:615:24
+  --> $DIR/lint-unused-unsafe.rs:611:24
    |
 LL |             let _ = || unsafe {};
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:621:20
+  --> $DIR/lint-unused-unsafe.rs:617:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:632:24
+  --> $DIR/lint-unused-unsafe.rs:628:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -844,7 +844,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:633:24
+  --> $DIR/lint-unused-unsafe.rs:629:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -853,7 +853,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:634:24
+  --> $DIR/lint-unused-unsafe.rs:630:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -862,7 +862,7 @@ LL |             let _ = || unsafe { let _ = || unsf(); };
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:645:28
+  --> $DIR/lint-unused-unsafe.rs:641:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -871,13 +871,13 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:643:20
+  --> $DIR/lint-unused-unsafe.rs:639:20
    |
 LL |             #[deny(unused_unsafe)]
    |                    ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:646:28
+  --> $DIR/lint-unused-unsafe.rs:642:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -886,7 +886,7 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:647:28
+  --> $DIR/lint-unused-unsafe.rs:643:28
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -895,13 +895,13 @@ LL |                 let _ = || unsafe { let _ = || unsf(); };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:667:20
+  --> $DIR/lint-unused-unsafe.rs:663:20
    |
 LL |         let _ = || unsafe {
    |                    ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:680:24
+  --> $DIR/lint-unused-unsafe.rs:676:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -909,7 +909,7 @@ LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:693:24
+  --> $DIR/lint-unused-unsafe.rs:689:24
    |
 LL |         let _ = || unsafe {
    |                    ------ because it's nested under this `unsafe` block
@@ -917,37 +917,37 @@ LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:711:24
+  --> $DIR/lint-unused-unsafe.rs:707:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:721:24
+  --> $DIR/lint-unused-unsafe.rs:717:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:722:28
+  --> $DIR/lint-unused-unsafe.rs:718:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:723:28
+  --> $DIR/lint-unused-unsafe.rs:719:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:729:24
+  --> $DIR/lint-unused-unsafe.rs:725:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:740:28
+  --> $DIR/lint-unused-unsafe.rs:736:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -956,7 +956,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:741:28
+  --> $DIR/lint-unused-unsafe.rs:737:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -965,7 +965,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:742:28
+  --> $DIR/lint-unused-unsafe.rs:738:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -974,7 +974,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:753:32
+  --> $DIR/lint-unused-unsafe.rs:749:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -983,13 +983,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:751:24
+  --> $DIR/lint-unused-unsafe.rs:747:24
    |
 LL |                 #[deny(unused_unsafe)]
    |                        ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:754:32
+  --> $DIR/lint-unused-unsafe.rs:750:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -998,7 +998,7 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:755:32
+  --> $DIR/lint-unused-unsafe.rs:751:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1007,37 +1007,37 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:765:24
+  --> $DIR/lint-unused-unsafe.rs:761:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:775:24
+  --> $DIR/lint-unused-unsafe.rs:771:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:776:28
+  --> $DIR/lint-unused-unsafe.rs:772:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:777:28
+  --> $DIR/lint-unused-unsafe.rs:773:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:783:24
+  --> $DIR/lint-unused-unsafe.rs:779:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:794:28
+  --> $DIR/lint-unused-unsafe.rs:790:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1046,7 +1046,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:795:28
+  --> $DIR/lint-unused-unsafe.rs:791:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1055,7 +1055,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:796:28
+  --> $DIR/lint-unused-unsafe.rs:792:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1064,7 +1064,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:807:32
+  --> $DIR/lint-unused-unsafe.rs:803:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1073,13 +1073,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:805:24
+  --> $DIR/lint-unused-unsafe.rs:801:24
    |
 LL |                 #[deny(unused_unsafe)]
    |                        ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:808:32
+  --> $DIR/lint-unused-unsafe.rs:804:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1088,7 +1088,7 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:809:32
+  --> $DIR/lint-unused-unsafe.rs:805:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1097,13 +1097,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:829:24
+  --> $DIR/lint-unused-unsafe.rs:825:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:842:28
+  --> $DIR/lint-unused-unsafe.rs:838:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1111,7 +1111,7 @@ LL |                 let _ = || unsafe {
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:855:28
+  --> $DIR/lint-unused-unsafe.rs:851:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1119,37 +1119,37 @@ LL |                 let _ = || unsafe {
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:869:24
+  --> $DIR/lint-unused-unsafe.rs:865:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:879:24
+  --> $DIR/lint-unused-unsafe.rs:875:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:880:28
+  --> $DIR/lint-unused-unsafe.rs:876:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:881:28
+  --> $DIR/lint-unused-unsafe.rs:877:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:887:24
+  --> $DIR/lint-unused-unsafe.rs:883:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:898:28
+  --> $DIR/lint-unused-unsafe.rs:894:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1158,7 +1158,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:899:28
+  --> $DIR/lint-unused-unsafe.rs:895:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1167,7 +1167,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:900:28
+  --> $DIR/lint-unused-unsafe.rs:896:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1176,7 +1176,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:911:32
+  --> $DIR/lint-unused-unsafe.rs:907:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1185,13 +1185,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:909:24
+  --> $DIR/lint-unused-unsafe.rs:905:24
    |
 LL |                 #[deny(unused_unsafe)]
    |                        ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:912:32
+  --> $DIR/lint-unused-unsafe.rs:908:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1200,7 +1200,7 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:913:32
+  --> $DIR/lint-unused-unsafe.rs:909:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1209,37 +1209,37 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:923:24
+  --> $DIR/lint-unused-unsafe.rs:919:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:933:24
+  --> $DIR/lint-unused-unsafe.rs:929:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:934:28
+  --> $DIR/lint-unused-unsafe.rs:930:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:935:28
+  --> $DIR/lint-unused-unsafe.rs:931:28
    |
 LL |                 let _ = || unsafe {};
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:941:24
+  --> $DIR/lint-unused-unsafe.rs:937:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:952:28
+  --> $DIR/lint-unused-unsafe.rs:948:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1248,7 +1248,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:953:28
+  --> $DIR/lint-unused-unsafe.rs:949:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1257,7 +1257,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:954:28
+  --> $DIR/lint-unused-unsafe.rs:950:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1266,7 +1266,7 @@ LL |                 let _ = || unsafe { unsf() };
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:965:32
+  --> $DIR/lint-unused-unsafe.rs:961:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1275,13 +1275,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
    |
 note: the lint level is defined here
-  --> $DIR/lint-unused-unsafe.rs:963:24
+  --> $DIR/lint-unused-unsafe.rs:959:24
    |
 LL |                 #[deny(unused_unsafe)]
    |                        ^^^^^^^^^^^^^
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:966:32
+  --> $DIR/lint-unused-unsafe.rs:962:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1290,7 +1290,7 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:967:32
+  --> $DIR/lint-unused-unsafe.rs:963:32
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1299,13 +1299,13 @@ LL |                     let _ = || unsafe { unsf() };
    |                                ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:987:24
+  --> $DIR/lint-unused-unsafe.rs:983:24
    |
 LL |             let _ = || unsafe {
    |                        ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1000:28
+  --> $DIR/lint-unused-unsafe.rs:996:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1313,7 +1313,7 @@ LL |                 let _ = || unsafe {
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1013:28
+  --> $DIR/lint-unused-unsafe.rs:1009:28
    |
 LL |             let _ = || unsafe {
    |                        ------ because it's nested under this `unsafe` block
@@ -1321,13 +1321,13 @@ LL |                 let _ = || unsafe {
    |                            ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1059:29
+  --> $DIR/lint-unused-unsafe.rs:1055:29
    |
 LL |             let _ = async { unsafe {
    |                             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1066:33
+  --> $DIR/lint-unused-unsafe.rs:1062:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1336,7 +1336,7 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1067:33
+  --> $DIR/lint-unused-unsafe.rs:1063:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1345,7 +1345,7 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1068:33
+  --> $DIR/lint-unused-unsafe.rs:1064:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1354,13 +1354,13 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1073:29
+  --> $DIR/lint-unused-unsafe.rs:1069:29
    |
 LL |             let _ = async { unsafe {
    |                             ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1080:33
+  --> $DIR/lint-unused-unsafe.rs:1076:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1369,7 +1369,7 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1081:33
+  --> $DIR/lint-unused-unsafe.rs:1077:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1378,7 +1378,7 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1082:33
+  --> $DIR/lint-unused-unsafe.rs:1078:33
    |
 LL |             let _ = async { unsafe {
    |                             ------ because it's nested under this `unsafe` block
@@ -1387,13 +1387,13 @@ LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
    |                                 ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1092:22
+  --> $DIR/lint-unused-unsafe.rs:1088:22
    |
 LL |         let _x: [(); unsafe { 0 }] = [];
    |                      ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/lint-unused-unsafe.rs:1096:22
+  --> $DIR/lint-unused-unsafe.rs:1092:22
    |
 LL |         let _x: [(); unsafe { unsafe { size() } }] = [];
    |                      ^^^^^^ unnecessary `unsafe` block
diff --git a/tests/ui/span/lint-unused-unsafe.rs b/tests/ui/span/lint-unused-unsafe.rs
index 5d042768be0..ca615f64f22 100644
--- a/tests/ui/span/lint-unused-unsafe.rs
+++ b/tests/ui/span/lint-unused-unsafe.rs
@@ -3,12 +3,8 @@
 
 // edition:2018
 
-// revisions: mir
-
-// FIXME: Adapt -Zthir-unsafeck to behave the same as the mir version after #93678,
-// then delete lint-unused-unsafe-thir.rs, and go back to using the settings below
-// // revisions: mir thir
-// // [thir]compile-flags: -Zthir-unsafeck
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
 
 #![allow(dead_code)]
 #![deny(unused_unsafe)]
diff --git a/tests/ui/span/lint-unused-unsafe.thir.stderr b/tests/ui/span/lint-unused-unsafe.thir.stderr
new file mode 100644
index 00000000000..9e8d3359242
--- /dev/null
+++ b/tests/ui/span/lint-unused-unsafe.thir.stderr
@@ -0,0 +1,1402 @@
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:22:13
+   |
+LL | fn bad1() { unsafe {} }
+   |             ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:10:9
+   |
+LL | #![deny(unused_unsafe)]
+   |         ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:23:13
+   |
+LL | fn bad2() { unsafe { bad1() } }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:24:20
+   |
+LL | unsafe fn bad3() { unsafe {} }
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:25:13
+   |
+LL | fn bad4() { unsafe { callback(||{}) } }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:28:5
+   |
+LL |     unsafe {
+   |     ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:35:5
+   |
+LL |     unsafe {
+   |     ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:70:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:79:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:80:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:81:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:86:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:96:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:97:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:98:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:108:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:106:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:109:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:110:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:120:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:130:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:131:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:132:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:138:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:149:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:150:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:151:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:162:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:160:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:163:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:164:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:174:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:184:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:185:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:186:13
+   |
+LL |             unsafe {}
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:192:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:203:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:204:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:205:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |             unsafe { unsf() }
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:216:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:214:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:217:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:218:17
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+...
+LL |                 unsafe { unsf() }
+   |                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:238:9
+   |
+LL |         unsafe {
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:251:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+LL |             unsafe {
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:264:13
+   |
+LL |         unsafe {
+   |         ------ because it's nested under this `unsafe` block
+LL |             unsafe {
+   |             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:282:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:291:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:292:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:293:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:298:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:308:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:309:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:310:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:320:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:318:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:321:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:322:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:332:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:342:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:343:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:344:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:350:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:361:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:362:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:363:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:374:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:372:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:375:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:376:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:386:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:396:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:397:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:398:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:404:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:415:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             unsf();
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:416:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:417:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { unsf() };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:428:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:426:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:429:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:430:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:450:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:463:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:476:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:495:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:504:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:505:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:506:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:511:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:521:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsf();
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:522:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:523:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:533:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:531:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:534:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:535:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:545:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:555:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:556:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:557:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:563:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:574:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsf();
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:575:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:576:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:587:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:585:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:588:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:589:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:599:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:609:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:610:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:611:24
+   |
+LL |             let _ = || unsafe {};
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:617:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:628:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsf();
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:629:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:630:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |             let _ = || unsafe { let _ = || unsf(); };
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:641:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:639:20
+   |
+LL |             #[deny(unused_unsafe)]
+   |                    ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:642:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:643:28
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { let _ = || unsf(); };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:663:20
+   |
+LL |         let _ = || unsafe {
+   |                    ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:676:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:689:24
+   |
+LL |         let _ = || unsafe {
+   |                    ------ because it's nested under this `unsafe` block
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:707:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:717:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:718:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:719:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:725:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:736:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 unsf();
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:737:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:738:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:749:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:747:24
+   |
+LL |                 #[deny(unused_unsafe)]
+   |                        ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:750:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:751:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:761:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:771:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:772:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:773:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:779:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:790:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 unsf();
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:791:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:792:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:803:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:801:24
+   |
+LL |                 #[deny(unused_unsafe)]
+   |                        ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:804:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:805:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:825:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:838:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 let _ = || unsafe {
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:851:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 let _ = || unsafe {
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:865:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:875:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:876:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:877:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:883:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:894:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 unsf();
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:895:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:896:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:907:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:905:24
+   |
+LL |                 #[deny(unused_unsafe)]
+   |                        ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:908:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:909:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:919:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:929:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:930:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:931:28
+   |
+LL |                 let _ = || unsafe {};
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:937:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:948:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 unsf();
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:949:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:950:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = || unsafe { unsf() };
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:961:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+   |
+note: the lint level is defined here
+  --> $DIR/lint-unused-unsafe.rs:959:24
+   |
+LL |                 #[deny(unused_unsafe)]
+   |                        ^^^^^^^^^^^^^
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:962:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:963:32
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+...
+LL |                     let _ = || unsafe { unsf() };
+   |                                ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:983:24
+   |
+LL |             let _ = || unsafe {
+   |                        ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:996:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 let _ = || unsafe {
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1009:28
+   |
+LL |             let _ = || unsafe {
+   |                        ------ because it's nested under this `unsafe` block
+LL |                 let _ = || unsafe {
+   |                            ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1055:29
+   |
+LL |             let _ = async { unsafe {
+   |                             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1062:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+LL |                 let _ = async { unsf() };
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1063:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1064:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1069:29
+   |
+LL |             let _ = async { unsafe {
+   |                             ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1076:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+LL |                 let _ = async { unsf() };
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1077:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1078:33
+   |
+LL |             let _ = async { unsafe {
+   |                             ------ because it's nested under this `unsafe` block
+...
+LL |                 let _ = async { unsafe { let _ = async { unsf() }; }};
+   |                                 ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1088:22
+   |
+LL |         let _x: [(); unsafe { 0 }] = [];
+   |                      ^^^^^^ unnecessary `unsafe` block
+
+error: unnecessary `unsafe` block
+  --> $DIR/lint-unused-unsafe.rs:1092:22
+   |
+LL |         let _x: [(); unsafe { unsafe { size() } }] = [];
+   |                      ^^^^^^ unnecessary `unsafe` block
+
+error: aborting due to 174 previous errors
+
diff --git a/tests/ui/unsafe/issue-45107-unnecessary-unsafe-in-closure.thir.stderr b/tests/ui/unsafe/issue-45107-unnecessary-unsafe-in-closure.thir.stderr
index 9e9cbcf33ae..2267da31512 100644
--- a/tests/ui/unsafe/issue-45107-unnecessary-unsafe-in-closure.thir.stderr
+++ b/tests/ui/unsafe/issue-45107-unnecessary-unsafe-in-closure.thir.stderr
@@ -16,9 +16,9 @@ LL | #[deny(unused_unsafe)]
 error: unnecessary `unsafe` block
   --> $DIR/issue-45107-unnecessary-unsafe-in-closure.rs:12:38
    |
-LL |     unsafe {
-   |     ------ because it's nested under this `unsafe` block
-...
+LL |             unsafe {
+   |             ------ because it's nested under this `unsafe` block
+LL |                 v.set_len(24);
 LL |                 |w: &mut Vec<u32>| { unsafe {
    |                                      ^^^^^^ unnecessary `unsafe` block
 
diff --git a/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr b/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
index 13c080e5b6a..4cdd97e5e06 100644
--- a/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
+++ b/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
@@ -76,12 +76,10 @@ LL |     unsafe {}
    |     ^^^^^^ unnecessary `unsafe` block
 
 error: unnecessary `unsafe` block
-  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:49:14
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:49:5
    |
 LL |     unsafe { unsafe { unsf() } }
-   |     ------   ^^^^^^ unnecessary `unsafe` block
-   |     |
-   |     because it's nested under this `unsafe` block
+   |     ^^^^^^ unnecessary `unsafe` block
 
 error[E0133]: call to unsafe function `unsf` is unsafe and requires unsafe block
   --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:76:5

From 11debd778a5f50d7a7240b653e36b22d3450f0a5 Mon Sep 17 00:00:00 2001
From: cui fliter <imcusg@gmail.com>
Date: Wed, 25 Oct 2023 19:14:03 +0800
Subject: [PATCH 6/7] Fix problematic comment

Signed-off-by: cui fliter <imcusg@gmail.com>
---
 tests/ui/const-generics/const-arg-in-const-arg.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/ui/const-generics/const-arg-in-const-arg.rs b/tests/ui/const-generics/const-arg-in-const-arg.rs
index 9eaa54347f1..c1a4c3dc348 100644
--- a/tests/ui/const-generics/const-arg-in-const-arg.rs
+++ b/tests/ui/const-generics/const-arg-in-const-arg.rs
@@ -1,5 +1,5 @@
 // revisions: min
-// we use a single revision because t his shoudl have a `full` revision
+// we use a single revision because this should have a `full` revision
 // but right now that ICEs and I(@BoxyUwU) could not get stderr normalization to work
 
 #![cfg_attr(full, feature(generic_const_exprs))]

From 1be00334578c09dc5b41de0f19e841add69eb22e Mon Sep 17 00:00:00 2001
From: Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de>
Date: Wed, 25 Oct 2023 14:27:00 +0000
Subject: [PATCH 7/7] Fix some coroutine sentences that don't make sense
 anymore.

These happened during the `generator` -> `coroutine` rename.
---
 library/core/src/ops/coroutine.rs                         | 2 +-
 src/doc/unstable-book/src/language-features/coroutines.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/core/src/ops/coroutine.rs b/library/core/src/ops/coroutine.rs
index e01a893a068..cd5ca988f7e 100644
--- a/library/core/src/ops/coroutine.rs
+++ b/library/core/src/ops/coroutine.rs
@@ -29,7 +29,7 @@ pub enum CoroutineState<Y, R> {
 
 /// The trait implemented by builtin coroutine types.
 ///
-/// Coroutines, also commonly referred to as coroutines, are currently an
+/// Coroutines are currently an
 /// experimental language feature in Rust. Added in [RFC 2033] coroutines are
 /// currently intended to primarily provide a building block for async/await
 /// syntax but will likely extend to also providing an ergonomic definition for
diff --git a/src/doc/unstable-book/src/language-features/coroutines.md b/src/doc/unstable-book/src/language-features/coroutines.md
index fb1ba791aef..f8e5a22fbd5 100644
--- a/src/doc/unstable-book/src/language-features/coroutines.md
+++ b/src/doc/unstable-book/src/language-features/coroutines.md
@@ -18,7 +18,7 @@ Coroutines are an extra-unstable feature in the compiler right now. Added in
 [RFC 2033] they're mostly intended right now as a information/constraint
 gathering phase. The intent is that experimentation can happen on the nightly
 compiler before actual stabilization. A further RFC will be required to
-stabilize coroutines/coroutines and will likely contain at least a few small
+stabilize coroutines and will likely contain at least a few small
 tweaks to the overall design.
 
 [RFC 2033]: https://github.com/rust-lang/rfcs/pull/2033