Auto merge of #91455 - matthiaskrgr:rollup-gix2hy6, r=matthiaskrgr

Rollup of 4 iffy pull requests

Successful merges:

 - #89234 (Disallow non-c-like but "fieldless" ADTs from being casted to integer if they use arbitrary enum discriminant)
 - #91045 (Issue 90702 fix: Stop treating some crate loading failures as fatal errors)
 - #91394 (Bump stage0 compiler)
 - #91411 (Enable svh tests on msvc)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

compiler/rustc_attr/src/builtin.rs

@@ -519,8 +519,10 @@ pub fn eval_condition(
                 [NestedMetaItem::Literal(Lit { kind: LitKind::Str(sym, ..), span, .. })] => {
                     (sym, span)
                 }
-                [NestedMetaItem::Literal(Lit { span, .. })
-                | NestedMetaItem::MetaItem(MetaItem { span, .. })] => {
+                [
+                    NestedMetaItem::Literal(Lit { span, .. })
+                    | NestedMetaItem::MetaItem(MetaItem { span, .. }),
+                ] => {
                     sess.span_diagnostic
                         .struct_span_err(*span, "expected a version literal")
                         .emit();

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -977,9 +977,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                 Some(ref name),
                 BorrowExplanation::MustBeValidFor {
                     category:
-                        category
-                        @
-                        (ConstraintCategory::Return(_)
+                        category @ (ConstraintCategory::Return(_)
                         | ConstraintCategory::CallArgument
                         | ConstraintCategory::OpaqueType),
                     from_closure: false,

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -165,10 +165,13 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             PlaceRef {
                 local: _,
                 projection:
-                    [.., ProjectionElem::Index(_)
-                    | ProjectionElem::ConstantIndex { .. }
-                    | ProjectionElem::Subslice { .. }
-                    | ProjectionElem::Downcast(..)],
+                    [
+                        ..,
+                        ProjectionElem::Index(_)
+                        | ProjectionElem::ConstantIndex { .. }
+                        | ProjectionElem::Subslice { .. }
+                        | ProjectionElem::Downcast(..),
+                    ],
             } => bug!("Unexpected immutable place."),
         }
 
@@ -217,7 +220,12 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             PlaceRef {
                 local,
                 projection:
-                    [proj_base @ .., ProjectionElem::Deref, ProjectionElem::Field(field, _), ProjectionElem::Deref],
+                    [
+                        proj_base @ ..,
+                        ProjectionElem::Deref,
+                        ProjectionElem::Field(field, _),
+                        ProjectionElem::Deref,
+                    ],
             } => {
                 err.span_label(span, format!("cannot {ACT}", ACT = act));
 
@@ -763,11 +771,14 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                                                 kind:
                                                     Call(
                                                         _,
-                                                        [Expr {
-                                                            kind: MethodCall(path_segment, ..),
-                                                            hir_id,
-                                                            ..
-                                                        }, ..],
+                                                        [
+                                                            Expr {
+                                                                kind: MethodCall(path_segment, ..),
+                                                                hir_id,
+                                                                ..
+                                                            },
+                                                            ..,
+                                                        ],
                                                     ),
                                                 ..
                                             },

compiler/rustc_borrowck/src/diagnostics/region_name.rs

@@ -769,20 +769,24 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
             let opaque_ty = hir.item(id);
             if let hir::ItemKind::OpaqueTy(hir::OpaqueTy {
                 bounds:
-                    [hir::GenericBound::LangItemTrait(
-                        hir::LangItem::Future,
-                        _,
-                        _,
-                        hir::GenericArgs {
-                            bindings:
-                                [hir::TypeBinding {
-                                    ident: Ident { name: sym::Output, .. },
-                                    kind: hir::TypeBindingKind::Equality { ty },
-                                    ..
-                                }],
-                            ..
-                        },
-                    )],
+                    [
+                        hir::GenericBound::LangItemTrait(
+                            hir::LangItem::Future,
+                            _,
+                            _,
+                            hir::GenericArgs {
+                                bindings:
+                                    [
+                                        hir::TypeBinding {
+                                            ident: Ident { name: sym::Output, .. },
+                                            kind: hir::TypeBindingKind::Equality { ty },
+                                            ..
+                                        },
+                                    ],
+                                ..
+                            },
+                        ),
+                    ],
                 ..
             }) = opaque_ty.kind
             {

compiler/rustc_borrowck/src/lib.rs

@@ -3,7 +3,6 @@
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(in_band_lifetimes)]
 #![feature(iter_zip)]
 #![feature(let_else)]

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -1525,14 +1525,12 @@ fn generator_layout_and_saved_local_names(
                 // Deref of the `Pin<&mut Self>` state argument.
                 mir::ProjectionElem::Field(..),
                 mir::ProjectionElem::Deref,
-
                 // Field of a variant of the state.
                 mir::ProjectionElem::Downcast(_, variant),
                 mir::ProjectionElem::Field(field, _),
             ] => {
-                let name = &mut generator_saved_local_names[
-                    generator_layout.variant_fields[variant][field]
-                ];
+                let name = &mut generator_saved_local_names
+                    [generator_layout.variant_fields[variant][field]];
                 if name.is_none() {
                     name.replace(var.name);
                 }

compiler/rustc_errors/src/lib.rs

@@ -6,7 +6,6 @@
 #![feature(crate_visibility_modifier)]
 #![feature(backtrace)]
 #![feature(if_let_guard)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(iter_zip)]
 #![feature(let_else)]
 #![feature(nll)]

compiler/rustc_expand/src/lib.rs

@@ -1,7 +1,6 @@
 #![feature(crate_visibility_modifier)]
 #![feature(decl_macro)]
 #![feature(destructuring_assignment)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(if_let_guard)]
 #![feature(iter_zip)]
 #![feature(let_else)]

compiler/rustc_expand/src/mbe/macro_parser.rs

@@ -584,9 +584,7 @@ fn inner_parse_loop<'root, 'tt>(
                 //
                 // At the beginning of the loop, if we reach the end of the delimited submatcher,
                 // we pop the stack to backtrack out of the descent.
-                seq
-                @
-                (TokenTree::Delimited(..)
+                seq @ (TokenTree::Delimited(..)
                 | TokenTree::Token(Token { kind: DocComment(..), .. })) => {
                     let lower_elts = mem::replace(&mut item.top_elts, Tt(seq));
                     let idx = item.idx;

compiler/rustc_expand/src/parse/tests.rs

@@ -65,24 +65,33 @@ fn string_to_tts_macro() {
         let tts: &[TokenTree] = &tts[..];
 
         match tts {
-            [TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }), TokenTree::Token(Token { kind: token::Not, .. }), TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }), TokenTree::Delimited(_, macro_delim, macro_tts)]
-                if name_macro_rules == &kw::MacroRules && name_zip.as_str() == "zip" =>
-            {
+            [
+                TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }),
+                TokenTree::Token(Token { kind: token::Not, .. }),
+                TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }),
+                TokenTree::Delimited(_, macro_delim, macro_tts),
+            ] if name_macro_rules == &kw::MacroRules && name_zip.as_str() == "zip" => {
                 let tts = &macro_tts.trees().collect::<Vec<_>>();
                 match &tts[..] {
-                    [TokenTree::Delimited(_, first_delim, first_tts), TokenTree::Token(Token { kind: token::FatArrow, .. }), TokenTree::Delimited(_, second_delim, second_tts)]
-                        if macro_delim == &token::Paren =>
-                    {
+                    [
+                        TokenTree::Delimited(_, first_delim, first_tts),
+                        TokenTree::Token(Token { kind: token::FatArrow, .. }),
+                        TokenTree::Delimited(_, second_delim, second_tts),
+                    ] if macro_delim == &token::Paren => {
                         let tts = &first_tts.trees().collect::<Vec<_>>();
                         match &tts[..] {
-                            [TokenTree::Token(Token { kind: token::Dollar, .. }), TokenTree::Token(Token { kind: token::Ident(name, false), .. })]
-                                if first_delim == &token::Paren && name.as_str() == "a" => {}
+                            [
+                                TokenTree::Token(Token { kind: token::Dollar, .. }),
+                                TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
+                            ] if first_delim == &token::Paren && name.as_str() == "a" => {}
                             _ => panic!("value 3: {:?} {:?}", first_delim, first_tts),
                         }
                         let tts = &second_tts.trees().collect::<Vec<_>>();
                         match &tts[..] {
-                            [TokenTree::Token(Token { kind: token::Dollar, .. }), TokenTree::Token(Token { kind: token::Ident(name, false), .. })]
-                                if second_delim == &token::Paren && name.as_str() == "a" => {}
+                            [
+                                TokenTree::Token(Token { kind: token::Dollar, .. }),
+                                TokenTree::Token(Token { kind: token::Ident(name, false), .. }),
+                            ] if second_delim == &token::Paren && name.as_str() == "a" => {}
                             _ => panic!("value 4: {:?} {:?}", second_delim, second_tts),
                         }
                     }

compiler/rustc_lint/src/lib.rs

@@ -30,7 +30,6 @@
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(iter_order_by)]
 #![feature(iter_zip)]
 #![feature(let_else)]

compiler/rustc_metadata/src/creader.rs

@@ -512,13 +512,17 @@ impl<'a> CrateLoader<'a> {
         name: Symbol,
         span: Span,
         dep_kind: CrateDepKind,
-    ) -> CrateNum {
+    ) -> Option<CrateNum> {
         self.used_extern_options.insert(name);
-        self.maybe_resolve_crate(name, dep_kind, None).unwrap_or_else(|err| {
-            let missing_core =
-                self.maybe_resolve_crate(sym::core, CrateDepKind::Explicit, None).is_err();
-            err.report(&self.sess, span, missing_core)
-        })
+        match self.maybe_resolve_crate(name, dep_kind, None) {
+            Ok(cnum) => Some(cnum),
+            Err(err) => {
+                let missing_core =
+                    self.maybe_resolve_crate(sym::core, CrateDepKind::Explicit, None).is_err();
+                err.report(&self.sess, span, missing_core);
+                None
+            }
+        }
     }
 
     fn maybe_resolve_crate<'b>(
@@ -751,7 +755,7 @@ impl<'a> CrateLoader<'a> {
         };
         info!("panic runtime not found -- loading {}", name);
 
-        let cnum = self.resolve_crate(name, DUMMY_SP, CrateDepKind::Implicit);
+        let Some(cnum) = self.resolve_crate(name, DUMMY_SP, CrateDepKind::Implicit) else { return; };
         let data = self.cstore.get_crate_data(cnum);
 
         // Sanity check the loaded crate to ensure it is indeed a panic runtime
@@ -791,7 +795,7 @@ impl<'a> CrateLoader<'a> {
             );
         }
 
-        let cnum = self.resolve_crate(name, DUMMY_SP, CrateDepKind::Implicit);
+        let Some(cnum) = self.resolve_crate(name, DUMMY_SP, CrateDepKind::Implicit) else { return; };
         let data = self.cstore.get_crate_data(cnum);
 
         // Sanity check the loaded crate to ensure it is indeed a profiler runtime
@@ -991,7 +995,7 @@ impl<'a> CrateLoader<'a> {
         item: &ast::Item,
         definitions: &Definitions,
         def_id: LocalDefId,
-    ) -> CrateNum {
+    ) -> Option<CrateNum> {
         match item.kind {
             ast::ItemKind::ExternCrate(orig_name) => {
                 debug!(
@@ -1011,7 +1015,7 @@ impl<'a> CrateLoader<'a> {
                     CrateDepKind::Explicit
                 };
 
-                let cnum = self.resolve_crate(name, item.span, dep_kind);
+                let cnum = self.resolve_crate(name, item.span, dep_kind)?;
 
                 let path_len = definitions.def_path(def_id).data.len();
                 self.update_extern_crate(
@@ -1023,14 +1027,14 @@ impl<'a> CrateLoader<'a> {
                         dependency_of: LOCAL_CRATE,
                     },
                 );
-                cnum
+                Some(cnum)
             }
             _ => bug!(),
         }
     }
 
-    pub fn process_path_extern(&mut self, name: Symbol, span: Span) -> CrateNum {
-        let cnum = self.resolve_crate(name, span, CrateDepKind::Explicit);
+    pub fn process_path_extern(&mut self, name: Symbol, span: Span) -> Option<CrateNum> {
+        let cnum = self.resolve_crate(name, span, CrateDepKind::Explicit)?;
 
         self.update_extern_crate(
             cnum,
@@ -1043,7 +1047,7 @@ impl<'a> CrateLoader<'a> {
             },
         );
 
-        cnum
+        Some(cnum)
     }
 
     pub fn maybe_process_path_extern(&mut self, name: Symbol) -> Option<CrateNum> {

compiler/rustc_metadata/src/locator.rs

@@ -220,7 +220,7 @@ use rustc_data_structures::memmap::Mmap;
 use rustc_data_structures::owning_ref::OwningRef;
 use rustc_data_structures::svh::Svh;
 use rustc_data_structures::sync::MetadataRef;
-use rustc_errors::struct_span_err;
+use rustc_errors::{struct_span_err, FatalError};
 use rustc_session::config::{self, CrateType};
 use rustc_session::cstore::{CrateSource, MetadataLoader};
 use rustc_session::filesearch::{FileDoesntMatch, FileMatches, FileSearch};
@@ -814,11 +814,11 @@ pub fn find_plugin_registrar(
     span: Span,
     name: Symbol,
 ) -> PathBuf {
-    match find_plugin_registrar_impl(sess, metadata_loader, name) {
-        Ok(res) => res,
+    find_plugin_registrar_impl(sess, metadata_loader, name).unwrap_or_else(|err| {
         // `core` is always available if we got as far as loading plugins.
-        Err(err) => err.report(sess, span, false),
-    }
+        err.report(sess, span, false);
+        FatalError.raise()
+    })
 }
 
 fn find_plugin_registrar_impl<'a>(
@@ -931,8 +931,8 @@ impl fmt::Display for MetadataError<'_> {
 }
 
 impl CrateError {
-    crate fn report(self, sess: &Session, span: Span, missing_core: bool) -> ! {
-        let mut err = match self {
+    crate fn report(self, sess: &Session, span: Span, missing_core: bool) {
+        let mut diag = match self {
             CrateError::NonAsciiName(crate_name) => sess.struct_span_err(
                 span,
                 &format!("cannot load a crate with a non-ascii name `{}`", crate_name),
@@ -1210,8 +1210,6 @@ impl CrateError {
             ),
         };
 
-        err.emit();
-        sess.abort_if_errors();
-        unreachable!();
+        diag.emit();
     }
 }

compiler/rustc_middle/src/ty/adt.rs

@@ -7,7 +7,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_errors::ErrorReported;
 use rustc_hir as hir;
-use rustc_hir::def::{DefKind, Res};
+use rustc_hir::def::{CtorKind, DefKind, Res};
 use rustc_hir::def_id::DefId;
 use rustc_index::vec::{Idx, IndexVec};
 use rustc_query_system::ich::StableHashingContext;
@@ -314,6 +314,22 @@ impl<'tcx> AdtDef {
     /// Whether the ADT lacks fields. Note that this includes uninhabited enums,
     /// e.g., `enum Void {}` is considered payload free as well.
     pub fn is_payloadfree(&self) -> bool {
+        // Treat the ADT as not payload-free if arbitrary_enum_discriminant is used (#88621).
+        // This would disallow the following kind of enum from being casted into integer.
+        // ```
+        // enum Enum {
+        //    Foo() = 1,
+        //    Bar{} = 2,
+        //    Baz = 3,
+        // }
+        // ```
+        if self
+            .variants
+            .iter()
+            .any(|v| matches!(v.discr, VariantDiscr::Explicit(_)) && v.ctor_kind != CtorKind::Const)
+        {
+            return false;
+        }
         self.variants.iter().all(|v| v.fields.is_empty())
     }
 

compiler/rustc_middle/src/ty/context.rs

@@ -1111,7 +1111,11 @@ impl<'tcx> TyCtxt<'tcx> {
             };
             debug!("layout_scalar_valid_range: attr={:?}", attr);
             if let Some(
-                &[ast::NestedMetaItem::Literal(ast::Lit { kind: ast::LitKind::Int(a, _), .. })],
+                &[
+                    ast::NestedMetaItem::Literal(ast::Lit {
+                        kind: ast::LitKind::Int(a, _), ..
+                    }),
+                ],
             ) = attr.meta_item_list().as_deref()
             {
                 Bound::Included(a)

compiler/rustc_middle/src/ty/sty.rs

@@ -354,14 +354,17 @@ impl<'tcx> ClosureSubsts<'tcx> {
     /// The ordering assumed here must match that used by `ClosureSubsts::new` above.
     fn split(self) -> ClosureSubstsParts<'tcx, GenericArg<'tcx>> {
         match self.substs[..] {
-            [ref parent_substs @ .., closure_kind_ty, closure_sig_as_fn_ptr_ty, tupled_upvars_ty] => {
-                ClosureSubstsParts {
-                    parent_substs,
-                    closure_kind_ty,
-                    closure_sig_as_fn_ptr_ty,
-                    tupled_upvars_ty,
-                }
-            }
+            [
+                ref parent_substs @ ..,
+                closure_kind_ty,
+                closure_sig_as_fn_ptr_ty,
+                tupled_upvars_ty,
+            ] => ClosureSubstsParts {
+                parent_substs,
+                closure_kind_ty,
+                closure_sig_as_fn_ptr_ty,
+                tupled_upvars_ty,
+            },
             _ => bug!("closure substs missing synthetics"),
         }
     }

compiler/rustc_passes/src/lib.rs

@@ -7,7 +7,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(crate_visibility_modifier)]
 #![feature(in_band_lifetimes)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(iter_zip)]
 #![feature(map_try_insert)]
 #![feature(min_specialization)]

compiler/rustc_resolve/src/build_reduced_graph.rs

@@ -678,75 +678,13 @@ impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
             }
 
             ItemKind::ExternCrate(orig_name) => {
-                let module = if orig_name.is_none() && ident.name == kw::SelfLower {
-                    self.r
-                        .session
-                        .struct_span_err(item.span, "`extern crate self;` requires renaming")
-                        .span_suggestion(
-                            item.span,
-                            "try",
-                            "extern crate self as name;".into(),
-                            Applicability::HasPlaceholders,
-                        )
-                        .emit();
-                    return;
-                } else if orig_name == Some(kw::SelfLower) {
-                    self.r.graph_root
-                } else {
-                    let crate_id = self.r.crate_loader.process_extern_crate(
-                        item,
-                        &self.r.definitions,
-                        local_def_id,
-                    );
-                    self.r.extern_crate_map.insert(local_def_id, crate_id);
-                    self.r.expect_module(crate_id.as_def_id())
-                };
-
-                let used = self.process_macro_use_imports(item, module);
-                let binding =
-                    (module, ty::Visibility::Public, sp, expansion).to_name_binding(self.r.arenas);
-                let import = self.r.arenas.alloc_import(Import {
-                    kind: ImportKind::ExternCrate { source: orig_name, target: ident },
-                    root_id: item.id,
-                    id: item.id,
-                    parent_scope: self.parent_scope,
-                    imported_module: Cell::new(Some(ModuleOrUniformRoot::Module(module))),
-                    has_attributes: !item.attrs.is_empty(),
-                    use_span_with_attributes: item.span_with_attributes(),
-                    use_span: item.span,
-                    root_span: item.span,
-                    span: item.span,
-                    module_path: Vec::new(),
-                    vis: Cell::new(vis),
-                    used: Cell::new(used),
-                });
-                self.r.potentially_unused_imports.push(import);
-                let imported_binding = self.r.import(binding, import);
-                if ptr::eq(parent, self.r.graph_root) {
-                    if let Some(entry) = self.r.extern_prelude.get(&ident.normalize_to_macros_2_0())
-                    {
-                        if expansion != LocalExpnId::ROOT
-                            && orig_name.is_some()
-                            && entry.extern_crate_item.is_none()
-                        {
-                            let msg = "macro-expanded `extern crate` items cannot \
-                                       shadow names passed with `--extern`";
-                            self.r.session.span_err(item.span, msg);
-                        }
-                    }
-                    let entry =
-                        self.r.extern_prelude.entry(ident.normalize_to_macros_2_0()).or_insert(
-                            ExternPreludeEntry {
-                                extern_crate_item: None,
-                                introduced_by_item: true,
-                            },
-                        );
-                    entry.extern_crate_item = Some(imported_binding);
-                    if orig_name.is_some() {
-                        entry.introduced_by_item = true;
-                    }
-                }
-                self.r.define(parent, ident, TypeNS, imported_binding);
+                self.build_reduced_graph_for_extern_crate(
+                    orig_name,
+                    item,
+                    local_def_id,
+                    vis,
+                    parent,
+                );
             }
 
             ItemKind::Mod(..) => {
@@ -884,6 +822,87 @@ impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
         }
     }
 
+    fn build_reduced_graph_for_extern_crate(
+        &mut self,
+        orig_name: Option<Symbol>,
+        item: &Item,
+        local_def_id: LocalDefId,
+        vis: ty::Visibility,
+        parent: Module<'a>,
+    ) {
+        let ident = item.ident;
+        let sp = item.span;
+        let parent_scope = self.parent_scope;
+        let expansion = parent_scope.expansion;
+
+        let (used, module, binding) = if orig_name.is_none() && ident.name == kw::SelfLower {
+            self.r
+                .session
+                .struct_span_err(item.span, "`extern crate self;` requires renaming")
+                .span_suggestion(
+                    item.span,
+                    "rename the `self` crate to be able to import it",
+                    "extern crate self as name;".into(),
+                    Applicability::HasPlaceholders,
+                )
+                .emit();
+            return;
+        } else if orig_name == Some(kw::SelfLower) {
+            Some(self.r.graph_root)
+        } else {
+            self.r.crate_loader.process_extern_crate(item, &self.r.definitions, local_def_id).map(
+                |crate_id| {
+                    self.r.extern_crate_map.insert(local_def_id, crate_id);
+                    self.r.expect_module(crate_id.as_def_id())
+                },
+            )
+        }
+        .map(|module| {
+            let used = self.process_macro_use_imports(item, module);
+            let binding =
+                (module, ty::Visibility::Public, sp, expansion).to_name_binding(self.r.arenas);
+            (used, Some(ModuleOrUniformRoot::Module(module)), binding)
+        })
+        .unwrap_or((true, None, self.r.dummy_binding));
+        let import = self.r.arenas.alloc_import(Import {
+            kind: ImportKind::ExternCrate { source: orig_name, target: ident },
+            root_id: item.id,
+            id: item.id,
+            parent_scope: self.parent_scope,
+            imported_module: Cell::new(module),
+            has_attributes: !item.attrs.is_empty(),
+            use_span_with_attributes: item.span_with_attributes(),
+            use_span: item.span,
+            root_span: item.span,
+            span: item.span,
+            module_path: Vec::new(),
+            vis: Cell::new(vis),
+            used: Cell::new(used),
+        });
+        self.r.potentially_unused_imports.push(import);
+        let imported_binding = self.r.import(binding, import);
+        if ptr::eq(parent, self.r.graph_root) {
+            if let Some(entry) = self.r.extern_prelude.get(&ident.normalize_to_macros_2_0()) {
+                if expansion != LocalExpnId::ROOT
+                    && orig_name.is_some()
+                    && entry.extern_crate_item.is_none()
+                {
+                    let msg = "macro-expanded `extern crate` items cannot \
+                                       shadow names passed with `--extern`";
+                    self.r.session.span_err(item.span, msg);
+                }
+            }
+            let entry = self.r.extern_prelude.entry(ident.normalize_to_macros_2_0()).or_insert(
+                ExternPreludeEntry { extern_crate_item: None, introduced_by_item: true },
+            );
+            entry.extern_crate_item = Some(imported_binding);
+            if orig_name.is_some() {
+                entry.introduced_by_item = true;
+            }
+        }
+        self.r.define(parent, ident, TypeNS, imported_binding);
+    }
+
     /// Constructs the reduced graph for one foreign item.
     fn build_reduced_graph_for_foreign_item(&mut self, item: &ForeignItem) {
         let local_def_id = self.r.local_def_id(item.id);

compiler/rustc_resolve/src/lib.rs

@@ -13,7 +13,6 @@
 #![feature(drain_filter)]
 #![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(iter_zip)]
 #![feature(let_else)]
 #![feature(never_type)]
@@ -3285,7 +3284,9 @@ impl<'a> Resolver<'a> {
                 Some(binding)
             } else {
                 let crate_id = if !speculative {
-                    self.crate_loader.process_path_extern(ident.name, ident.span)
+                    let Some(crate_id) =
+                        self.crate_loader.process_path_extern(ident.name, ident.span) else { return Some(self.dummy_binding); };
+                    crate_id
                 } else {
                     self.crate_loader.maybe_process_path_extern(ident.name)?
                 };

compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs

@@ -2026,9 +2026,7 @@ impl<'a, 'tcx> InferCtxtPrivExt<'tcx> for InferCtxt<'a, 'tcx> {
         debug!("maybe_suggest_unsized_generics: param={:?}", param);
         match node {
             hir::Node::Item(
-                item
-                @
-                hir::Item {
+                item @ hir::Item {
                     // Only suggest indirection for uses of type parameters in ADTs.
                     kind:
                         hir::ItemKind::Enum(..) | hir::ItemKind::Struct(..) | hir::ItemKind::Union(..),

compiler/rustc_typeck/src/check/coercion.rs

@@ -1126,8 +1126,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         for expr in exprs {
             let expr = expr.as_coercion_site();
             let noop = match self.typeck_results.borrow().expr_adjustments(expr) {
-                &[Adjustment { kind: Adjust::Deref(_), .. }, Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(_, mutbl_adj)), .. }] =>
-                {
+                &[
+                    Adjustment { kind: Adjust::Deref(_), .. },
+                    Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(_, mutbl_adj)), .. },
+                ] => {
                     match *self.node_ty(expr.hir_id).kind() {
                         ty::Ref(_, _, mt_orig) => {
                             let mutbl_adj: hir::Mutability = mutbl_adj.into();

compiler/rustc_typeck/src/check/fn_ctxt/_impl.rs

@@ -304,20 +304,26 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     // is a valid NeverToAny adjustment, because it can't
                     // be reached.
                     (&[Adjustment { kind: Adjust::NeverToAny, .. }], _) => return,
-                    (&[
-                        Adjustment { kind: Adjust::Deref(_), .. },
-                        Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(..)), .. },
-                    ], &[
-                        Adjustment { kind: Adjust::Deref(_), .. },
-                        .. // Any following adjustments are allowed.
-                    ]) => {
+                    (
+                        &[
+                            Adjustment { kind: Adjust::Deref(_), .. },
+                            Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(..)), .. },
+                        ],
+                        &[
+                            Adjustment { kind: Adjust::Deref(_), .. },
+                            .., // Any following adjustments are allowed.
+                        ],
+                    ) => {
                         // A reborrow has no effect before a dereference.
                     }
                     // FIXME: currently we never try to compose autoderefs
                     // and ReifyFnPointer/UnsafeFnPointer, but we could.
-                    _ =>
-                        bug!("while adjusting {:?}, can't compose {:?} and {:?}",
-                             expr, entry.get(), adj)
+                    _ => bug!(
+                        "while adjusting {:?}, can't compose {:?} and {:?}",
+                        expr,
+                        entry.get(),
+                        adj
+                    ),
                 };
                 *entry.get_mut() = adj;
             }

compiler/rustc_typeck/src/check/place_op.rs

@@ -440,8 +440,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             }
 
             // If we have an autoref followed by unsizing at the end, fix the unsize target.
-            if let [.., Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(..)), .. }, Adjustment { kind: Adjust::Pointer(PointerCast::Unsize), ref mut target }] =
-                adjustments[..]
+            if let [
+                ..,
+                Adjustment { kind: Adjust::Borrow(AutoBorrow::Ref(..)), .. },
+                Adjustment { kind: Adjust::Pointer(PointerCast::Unsize), ref mut target },
+            ] = adjustments[..]
             {
                 *target = method.sig.inputs()[0];
             }

compiler/rustc_typeck/src/check/upvar.rs

@@ -687,15 +687,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             r
                         ),
                         (
-                            l
-                            @
-                            (ProjectionKind::Index
+                            l @ (ProjectionKind::Index
                             | ProjectionKind::Subslice
                             | ProjectionKind::Deref
                             | ProjectionKind::Field(..)),
-                            r
-                            @
-                            (ProjectionKind::Index
+                            r @ (ProjectionKind::Index
                             | ProjectionKind::Subslice
                             | ProjectionKind::Deref
                             | ProjectionKind::Field(..)),

compiler/rustc_typeck/src/lib.rs

@@ -58,7 +58,6 @@ This API is completely unstable and subject to change.
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(if_let_guard)]
 #![feature(in_band_lifetimes)]
 #![feature(is_sorted)]

library/alloc/src/lib.rs

@@ -105,7 +105,6 @@
 #![feature(fmt_internals)]
 #![feature(fn_traits)]
 #![feature(inherent_ascii_escape)]
-#![cfg_attr(bootstrap, feature(format_args_capture))]
 #![feature(inplace_iteration)]
 #![feature(iter_advance_by)]
 #![feature(iter_zip)]

library/core/src/array/mod.rs

@@ -330,11 +330,9 @@ impl<T: Ord, const N: usize> Ord for [T; N] {
     }
 }
 
-#[cfg(not(bootstrap))]
 #[stable(feature = "copy_clone_array_lib", since = "1.58.0")]
 impl<T: Copy, const N: usize> Copy for [T; N] {}
 
-#[cfg(not(bootstrap))]
 #[stable(feature = "copy_clone_array_lib", since = "1.58.0")]
 impl<T: Clone, const N: usize> Clone for [T; N] {
     #[inline]
@@ -348,12 +346,10 @@ impl<T: Clone, const N: usize> Clone for [T; N] {
     }
 }
 
-#[cfg(not(bootstrap))]
 trait SpecArrayClone: Clone {
     fn clone<const N: usize>(array: &[Self; N]) -> [Self; N];
 }
 
-#[cfg(not(bootstrap))]
 impl<T: Clone> SpecArrayClone for T {
     #[inline]
     default fn clone<const N: usize>(array: &[T; N]) -> [T; N] {
@@ -363,7 +359,6 @@ impl<T: Clone> SpecArrayClone for T {
     }
 }
 
-#[cfg(not(bootstrap))]
 impl<T: Copy> SpecArrayClone for T {
     #[inline]
     fn clone<const N: usize>(array: &[T; N]) -> [T; N] {

library/core/src/lib.rs

@@ -159,14 +159,12 @@
 #![feature(const_impl_trait)]
 #![feature(const_mut_refs)]
 #![feature(const_precise_live_drops)]
-#![cfg_attr(bootstrap, feature(const_raw_ptr_deref))]
 #![feature(const_refs_to_cell)]
 #![feature(decl_macro)]
 #![feature(derive_default_enum)]
 #![feature(doc_cfg)]
 #![feature(doc_notable_trait)]
-#![cfg_attr(bootstrap, feature(doc_primitive))]
-#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]
+#![feature(rustdoc_internals)]
 #![feature(exhaustive_patterns)]
 #![feature(doc_cfg_hide)]
 #![feature(extern_types)]
@@ -198,7 +196,7 @@
 #![feature(try_blocks)]
 #![feature(unboxed_closures)]
 #![feature(unsized_fn_params)]
-#![cfg_attr(not(bootstrap), feature(asm_const))]
+#![feature(asm_const)]
 //
 // Target features:
 #![feature(aarch64_target_feature)]
@@ -408,13 +406,11 @@ pub mod arch {
 #[allow(rustdoc::bare_urls)]
 #[unstable(feature = "portable_simd", issue = "86656")]
 #[cfg(not(all(miri, doctest)))] // Miri does not support all SIMD intrinsics
-#[cfg(not(bootstrap))]
 mod core_simd;
 
 #[doc = include_str!("../../portable-simd/crates/core_simd/src/core_simd_docs.md")]
 #[unstable(feature = "portable_simd", issue = "86656")]
 #[cfg(not(all(miri, doctest)))] // Miri does not support all SIMD intrinsics
-#[cfg(not(bootstrap))]
 pub mod simd {
     #[unstable(feature = "portable_simd", issue = "86656")]
     pub use crate::core_simd::simd::*;

library/core/src/mem/maybe_uninit.rs

@@ -789,7 +789,6 @@ impl<T> MaybeUninit<T> {
     /// ```
     #[stable(feature = "maybe_uninit_ref", since = "1.55.0")]
     #[rustc_const_stable(feature = "const_maybe_uninit_assume_init", since = "1.59.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_raw_ptr_deref))]
     #[inline(always)]
     pub const unsafe fn assume_init_ref(&self) -> &T {
         // SAFETY: the caller must guarantee that `self` is initialized.

library/core/src/ops/generator.rs

@@ -82,7 +82,7 @@ pub trait Generator<R = ()> {
     /// `return` statement or implicitly as the last expression of a generator
     /// literal. For example futures would use this as `Result<T, E>` as it
     /// represents a completed future.
-    #[cfg_attr(not(bootstrap), lang = "generator_return")]
+    #[lang = "generator_return"]
     type Return;
 
     /// Resumes the execution of this generator.

library/core/src/slice/raw.rs

@@ -131,7 +131,7 @@ pub const unsafe fn from_raw_parts_mut<'a, T>(data: *mut T, len: usize) -> &'a m
 }
 
 // In debug builds checks that `data` pointer is aligned and non-null and that slice with given `len` would cover less than half the address space
-#[cfg(all(not(bootstrap), debug_assertions))]
+#[cfg(debug_assertions)]
 #[unstable(feature = "const_slice_from_raw_parts", issue = "67456")]
 #[rustc_const_unstable(feature = "const_slice_from_raw_parts", issue = "67456")]
 const fn debug_check_data_len<T>(data: *const T, len: usize) {
@@ -161,7 +161,7 @@ const fn debug_check_data_len<T>(data: *const T, len: usize) {
     );
 }
 
-#[cfg(not(all(not(bootstrap), debug_assertions)))]
+#[cfg(not(debug_assertions))]
 const fn debug_check_data_len<T>(_data: *const T, _len: usize) {}
 
 /// Converts a reference to T into a slice of length 1 (without copying).

library/core/src/time.rs

@@ -182,7 +182,6 @@ impl Duration {
     #[inline]
     #[must_use]
     #[rustc_const_stable(feature = "duration_consts_2", since = "1.58.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_panic))]
     pub const fn new(secs: u64, nanos: u32) -> Duration {
         let secs = match secs.checked_add((nanos / NANOS_PER_SEC) as u64) {
             Some(secs) => secs,
@@ -482,7 +481,6 @@ impl Duration {
                   without modifying the original"]
     #[inline]
     #[rustc_const_stable(feature = "duration_consts_2", since = "1.58.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_panic))]
     pub const fn checked_add(self, rhs: Duration) -> Option<Duration> {
         if let Some(mut secs) = self.secs.checked_add(rhs.secs) {
             let mut nanos = self.nanos + rhs.nanos;
@@ -543,7 +541,6 @@ impl Duration {
                   without modifying the original"]
     #[inline]
     #[rustc_const_stable(feature = "duration_consts_2", since = "1.58.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_panic))]
     pub const fn checked_sub(self, rhs: Duration) -> Option<Duration> {
         if let Some(mut secs) = self.secs.checked_sub(rhs.secs) {
             let nanos = if self.nanos >= rhs.nanos {
@@ -602,7 +599,6 @@ impl Duration {
                   without modifying the original"]
     #[inline]
     #[rustc_const_stable(feature = "duration_consts_2", since = "1.58.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_panic))]
     pub const fn checked_mul(self, rhs: u32) -> Option<Duration> {
         // Multiply nanoseconds as u64, because it cannot overflow that way.
         let total_nanos = self.nanos as u64 * rhs as u64;
@@ -660,7 +656,6 @@ impl Duration {
                   without modifying the original"]
     #[inline]
     #[rustc_const_stable(feature = "duration_consts_2", since = "1.58.0")]
-    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_panic))]
     pub const fn checked_div(self, rhs: u32) -> Option<Duration> {
         if rhs != 0 {
             let secs = self.secs / (rhs as u64);

library/core/tests/lib.rs

@@ -59,11 +59,10 @@
 #![feature(const_mut_refs)]
 #![feature(const_pin)]
 #![feature(const_slice_from_raw_parts)]
-#![cfg_attr(bootstrap, feature(const_raw_ptr_deref))]
 #![feature(never_type)]
 #![feature(unwrap_infallible)]
 #![feature(result_into_ok_or_err)]
-#![cfg_attr(not(bootstrap), feature(portable_simd))]
+#![feature(portable_simd)]
 #![feature(ptr_metadata)]
 #![feature(once_cell)]
 #![feature(unsized_tuple_coercion)]
@@ -109,7 +108,6 @@ mod pattern;
 mod pin;
 mod ptr;
 mod result;
-#[cfg(not(bootstrap))]
 mod simd;
 mod slice;
 mod str;

library/std/src/lib.rs

@@ -264,8 +264,7 @@
 #![feature(const_ipv4)]
 #![feature(const_ipv6)]
 #![feature(const_option)]
-#![cfg_attr(bootstrap, feature(const_raw_ptr_deref))]
-#![cfg_attr(not(bootstrap), feature(const_mut_refs))]
+#![feature(const_mut_refs)]
 #![feature(const_socketaddr)]
 #![feature(const_trait_impl)]
 #![feature(container_error_extra)]
@@ -275,9 +274,7 @@
 #![feature(decl_macro)]
 #![feature(doc_cfg)]
 #![feature(doc_cfg_hide)]
-#![cfg_attr(bootstrap, feature(doc_primitive))]
-#![cfg_attr(bootstrap, feature(doc_keyword))]
-#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]
+#![feature(rustdoc_internals)]
 #![feature(doc_masked)]
 #![feature(doc_notable_trait)]
 #![feature(dropck_eyepatch)]
@@ -323,7 +320,7 @@
 #![feature(panic_internals)]
 #![feature(panic_unwind)]
 #![feature(pin_static_ref)]
-#![cfg_attr(not(bootstrap), feature(portable_simd))]
+#![feature(portable_simd)]
 #![feature(prelude_import)]
 #![feature(ptr_internals)]
 #![feature(rustc_attrs)]
@@ -476,7 +473,6 @@ pub use core::ptr;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::result;
 #[unstable(feature = "portable_simd", issue = "86656")]
-#[cfg(not(bootstrap))]
 pub use core::simd;
 #[unstable(feature = "async_stream", issue = "79024")]
 pub use core::stream;

src/librustdoc/clean/utils.rs

@@ -395,9 +395,7 @@ crate fn register_res(cx: &mut DocContext<'_>, res: Res) -> DefId {
     let (did, kind) = match res {
         // These should be added to the cache using `record_extern_fqn`.
         Res::Def(
-            kind
-            @
-            (AssocTy | AssocFn | AssocConst | Variant | Fn | TyAlias | Enum | Trait | Struct
+            kind @ (AssocTy | AssocFn | AssocConst | Variant | Fn | TyAlias | Enum | Trait | Struct
             | Union | Mod | ForeignTy | Const | Static | Macro(..) | TraitAlias),
             i,
         ) => (i, kind.into()),

src/stage0.json

@@ -2,347 +2,347 @@
   "__comment": "Generated by `./x.py run src/tools/bump-stage0`. Run that command again to update the bootstrap compiler.",
   "dist_server": "https://static.rust-lang.org",
   "compiler": {
-    "date": "2021-10-22",
+    "date": "2021-11-30",
     "version": "beta"
   },
   "rustfmt": {
-    "date": "2021-10-23",
+    "date": "2021-11-30",
     "version": "nightly"
   },
   "checksums_sha256": {
-    "dist/2021-10-22/cargo-beta-aarch64-apple-darwin.tar.gz": "b81ef641492ff2f03a93c8fbfbcfa78db2f6574d1998569d68dd2ba0e08ee186",
-    "dist/2021-10-22/cargo-beta-aarch64-apple-darwin.tar.xz": "925090782ad982202ca554a84e9d4a7b190f94b0b220c23e73235383d6ca367d",
-    "dist/2021-10-22/cargo-beta-aarch64-pc-windows-msvc.tar.gz": "eba42edfebc85c744f4c6874337847748df65e430915f47238a93b1b7e96840a",
-    "dist/2021-10-22/cargo-beta-aarch64-pc-windows-msvc.tar.xz": "fd04a8c4058ff287ea0256fd9f33a4b04b4f098d6911e8d827525cdeda6f169e",
-    "dist/2021-10-22/cargo-beta-aarch64-unknown-linux-gnu.tar.gz": "c7abbf1f265435cc9f6f0773d30321fc99353e0ddbf0004d00f47433eb3aaab1",
-    "dist/2021-10-22/cargo-beta-aarch64-unknown-linux-gnu.tar.xz": "3363dfdcd7106841edbd9029676ac339ff54c142921d71d92e308bee2ee33066",
-    "dist/2021-10-22/cargo-beta-aarch64-unknown-linux-musl.tar.gz": "fbc5d5f70a36fc73f4d34d101aef4be78e38b5009ebf690fe46ba32eff6c1fce",
-    "dist/2021-10-22/cargo-beta-aarch64-unknown-linux-musl.tar.xz": "220f23f50645532df4e5a4b1d6d894ce66a6ee2e5576fdf552081644a74a1c8f",
-    "dist/2021-10-22/cargo-beta-arm-unknown-linux-gnueabi.tar.gz": "94b42b8639ce541c1a355991f20d9934c72e766b6200d742d2d5b3b2f499f782",
-    "dist/2021-10-22/cargo-beta-arm-unknown-linux-gnueabi.tar.xz": "e32e9df3ab261fe20c363406d655fdaeeefc9dbb3d69da4551cdf9c22c418eb2",
-    "dist/2021-10-22/cargo-beta-arm-unknown-linux-gnueabihf.tar.gz": "301c303ec0db0e342ecce4e259e79810e082766bac8f9907c353bdf490177863",
-    "dist/2021-10-22/cargo-beta-arm-unknown-linux-gnueabihf.tar.xz": "d6f9409076ab4e2dac5ac5c07bac6be30e83e281df9efe2fa68386928e2e6faf",
-    "dist/2021-10-22/cargo-beta-armv7-unknown-linux-gnueabihf.tar.gz": "a4a82d48b2b1e6a49c0a765f9ee4d01e7ce4b0543128745d13cf4684c56eca8c",
-    "dist/2021-10-22/cargo-beta-armv7-unknown-linux-gnueabihf.tar.xz": "c9ca524ba0e76d9fe38f0e4af337d14b97fd97dcd83d80ebf4725b5b03bea3ac",
-    "dist/2021-10-22/cargo-beta-i686-pc-windows-gnu.tar.gz": "973eabda91963d58a9cdd1491bcea15834874fbca018287fb7f5c8bdcdf323d1",
-    "dist/2021-10-22/cargo-beta-i686-pc-windows-gnu.tar.xz": "cbbc14d1ef0e4579167fce4a5fac43b22c87882049a3d0edfbace9fc5c103ad3",
-    "dist/2021-10-22/cargo-beta-i686-pc-windows-msvc.tar.gz": "ef090943f6c90bb3327225e0256e73762ca2f73ae5d0d07b2c828709077e1132",
-    "dist/2021-10-22/cargo-beta-i686-pc-windows-msvc.tar.xz": "42708683ba5ad855880ec69d92192bd9f99ebf102beaf6c53680cb8733fba9e7",
-    "dist/2021-10-22/cargo-beta-i686-unknown-linux-gnu.tar.gz": "b6c260ba19734482439bf6d12b8e87e82f269f1bec447ec85e59372ef6489eec",
-    "dist/2021-10-22/cargo-beta-i686-unknown-linux-gnu.tar.xz": "fb6036ff910d075fb5e483000af641328e6d7d01c33255c099ed1b0302239918",
-    "dist/2021-10-22/cargo-beta-mips-unknown-linux-gnu.tar.gz": "71e4e5fcf055251089ac0d37b5ad873eaee6aa0380438cd68f140a16d3a37cd1",
-    "dist/2021-10-22/cargo-beta-mips-unknown-linux-gnu.tar.xz": "b89acabf106b10c5c3421574bea83d8baf1f29d040c40d5522f85e2e6afa6373",
-    "dist/2021-10-22/cargo-beta-mips64-unknown-linux-gnuabi64.tar.gz": "f544ea08d2f6086dc49c4d635116f3b4b804e5b68251e5fad433d538ae5e8226",
-    "dist/2021-10-22/cargo-beta-mips64-unknown-linux-gnuabi64.tar.xz": "54b0cbb4292cc4733a704017775e5cd4a9be34d53a4c666d6fc556472b508e1c",
-    "dist/2021-10-22/cargo-beta-mips64el-unknown-linux-gnuabi64.tar.gz": "5e81253ec483f096e23ed98f939220b029814c041b4b72b93e994cead3dc4f4c",
-    "dist/2021-10-22/cargo-beta-mips64el-unknown-linux-gnuabi64.tar.xz": "1a66beee5ccfd8b0fb4de52bccd11a0057248ac7fe8daf4f4d6fe0c0088044ea",
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   }
 }

src/test/ui/cast/issue-88621.rs

@@ -0,0 +1,13 @@
+#![feature(arbitrary_enum_discriminant)]
+
+#[repr(u8)]
+enum Kind2 {
+    Foo() = 1,
+    Bar{} = 2,
+    Baz = 3,
+}
+
+fn main() {
+    let _ = Kind2::Foo() as u8;
+    //~^ ERROR non-primitive cast
+}

src/test/ui/cast/issue-88621.stderr

@@ -0,0 +1,9 @@
+error[E0605]: non-primitive cast: `Kind2` as `u8`
+  --> $DIR/issue-88621.rs:11:13
+   |
+LL |     let _ = Kind2::Foo() as u8;
+   |             ^^^^^^^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0605`.

src/test/ui/crate-loading/invalid-rlib.rs

@@ -6,3 +6,5 @@
 #![no_std]
 use ::foo; //~ ERROR invalid metadata files for crate `foo`
 //~| NOTE failed to mmap file
+//~^^ ERROR invalid metadata files for crate `foo`
+//~| NOTE failed to mmap file

src/test/ui/crate-loading/invalid-rlib.stderr

@@ -6,6 +6,14 @@ LL | use ::foo;
    |
    = note: failed to mmap file 'auxiliary/libfoo.rlib'
 
-error: aborting due to previous error
+error[E0786]: found invalid metadata files for crate `foo`
+  --> $DIR/invalid-rlib.rs:7:7
+   |
+LL | use ::foo;
+   |       ^^^
+   |
+   = note: failed to mmap file 'auxiliary/libfoo.rlib'
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0786`.

src/test/ui/crate-loading/missing-std.rs

@@ -1,6 +1,7 @@
 // compile-flags: --target x86_64-unknown-uefi
 // needs-llvm-components: x86
 // rustc-env:CARGO=/usr/bin/cargo
+#![feature(no_core)]
 #![no_core]
 extern crate core;
 //~^ ERROR can't find crate for `core`

src/test/ui/crate-loading/missing-std.stderr

@@ -1,5 +1,5 @@
 error[E0463]: can't find crate for `core`
-  --> $DIR/missing-std.rs:5:1
+  --> $DIR/missing-std.rs:6:1
    |
 LL | extern crate core;
    | ^^^^^^^^^^^^^^^^^^ can't find crate
@@ -8,6 +8,8 @@ LL | extern crate core;
    = help: consider downloading the target with `rustup target add x86_64-unknown-uefi`
    = help: consider building the standard library from source with `cargo build -Zbuild-std`
 
-error: aborting due to previous error
+error: requires `sized` lang_item
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0463`.

src/test/ui/enum-discriminant/arbitrary_enum_discriminant.rs

@@ -22,14 +22,6 @@ impl Enum {
     }
 }
 
-#[allow(dead_code)]
-#[repr(u8)]
-enum FieldlessEnum {
-    Unit = 3,
-    Tuple() = 2,
-    Struct {} = 1,
-}
-
 fn main() {
     const UNIT: Enum = Enum::Unit;
     const TUPLE: Enum = Enum::Tuple(5);
@@ -48,9 +40,4 @@ fn main() {
     assert_eq!(3, UNIT_TAG);
     assert_eq!(2, TUPLE_TAG);
     assert_eq!(1, STRUCT_TAG);
-
-    // Ensure `as` conversions are correct
-    assert_eq!(3, FieldlessEnum::Unit as u8);
-    assert_eq!(2, FieldlessEnum::Tuple() as u8);
-    assert_eq!(1, FieldlessEnum::Struct{} as u8);
 }

src/test/ui/extern-flag/empty-extern-arg.rs

@@ -1,4 +1,6 @@
 // compile-flags: --extern std=
 // error-pattern: extern location for std does not exist
+// needs-unwind since it affects the error output
+// ignore-emscripten compiled with panic=abort, personality not required
 
 fn main() {}

src/test/ui/extern-flag/empty-extern-arg.stderr

@@ -1,4 +1,8 @@
 error: extern location for std does not exist: 
 
-error: aborting due to previous error
+error: language item required, but not found: `eh_personality`
+
+error: `#[panic_handler]` function required, but not found
+
+error: aborting due to 3 previous errors
 

src/test/ui/extern/extern-crate-multiple-missing.rs

@@ -0,0 +1,10 @@
+// If multiple `extern crate` resolutions fail each of them should produce an error
+extern crate bar; //~ ERROR can't find crate for `bar`
+extern crate foo; //~ ERROR can't find crate for `foo`
+
+fn main() {
+    // If the crate name introduced by `extern crate` failed to resolve then subsequent
+    // derived paths do not emit additional errors
+    foo::something();
+    bar::something();
+}

src/test/ui/extern/extern-crate-multiple-missing.stderr

@@ -0,0 +1,15 @@
+error[E0463]: can't find crate for `bar`
+  --> $DIR/extern-crate-multiple-missing.rs:2:1
+   |
+LL | extern crate bar;
+   | ^^^^^^^^^^^^^^^^^ can't find crate
+
+error[E0463]: can't find crate for `foo`
+  --> $DIR/extern-crate-multiple-missing.rs:3:1
+   |
+LL | extern crate foo;
+   | ^^^^^^^^^^^^^^^^^ can't find crate
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0463`.

src/test/ui/imports/extern-crate-self/extern-crate-self-fail.stderr

@@ -2,7 +2,12 @@ error: `extern crate self;` requires renaming
   --> $DIR/extern-crate-self-fail.rs:1:1
    |
 LL | extern crate self;
-   | ^^^^^^^^^^^^^^^^^^ help: try: `extern crate self as name;`
+   | ^^^^^^^^^^^^^^^^^^
+   |
+help: rename the `self` crate to be able to import it
+   |
+LL | extern crate self as name;
+   | ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 error: `#[macro_use]` is not supported on `extern crate self`
   --> $DIR/extern-crate-self-fail.rs:3:1

src/test/ui/issues/issue-37131.stderr

@@ -4,6 +4,8 @@ error[E0463]: can't find crate for `std`
    = help: consider downloading the target with `rustup target add thumbv6m-none-eabi`
    = help: consider building the standard library from source with `cargo build -Zbuild-std`
 
-error: aborting due to previous error
+error: requires `sized` lang_item
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0463`.

src/test/ui/issues/issue-49851/compiler-builtins-error.rs

@@ -1,4 +1,5 @@
-//~ ERROR 1:1: 1:1: can't find crate for `core` [E0463]
+//~ ERROR can't find crate for `core`
+//~^ ERROR can't find crate for `compiler_builtins`
 
 // compile-flags: --target thumbv7em-none-eabihf
 // needs-llvm-components: arm
@@ -7,3 +8,6 @@
 #![no_std]
 
 extern crate cortex_m;
+//~^ ERROR can't find crate for `cortex_m`
+
+fn main() {}

src/test/ui/issues/issue-49851/compiler-builtins-error.stderr

@@ -4,6 +4,16 @@ error[E0463]: can't find crate for `core`
    = help: consider downloading the target with `rustup target add thumbv7em-none-eabihf`
    = help: consider building the standard library from source with `cargo build -Zbuild-std`
 
-error: aborting due to previous error
+error[E0463]: can't find crate for `compiler_builtins`
+
+error[E0463]: can't find crate for `cortex_m`
+  --> $DIR/compiler-builtins-error.rs:10:1
+   |
+LL | extern crate cortex_m;
+   | ^^^^^^^^^^^^^^^^^^^^^^ can't find crate
+
+error: requires `sized` lang_item
+
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0463`.

src/test/ui/rust-2018/uniform-paths/deadlock.rs

@@ -1,7 +1,8 @@
 // edition:2018
 // compile-flags:--extern foo --extern bar
 
+use bar::foo; //~ ERROR can't find crate for `bar`
 use foo::bar; //~ ERROR can't find crate for `foo`
-use bar::foo;
+//~^^ ERROR unresolved imports `bar::foo`, `foo::bar`
 
 fn main() {}

src/test/ui/rust-2018/uniform-paths/deadlock.stderr

@@ -1,9 +1,24 @@
-error[E0463]: can't find crate for `foo`
+error[E0463]: can't find crate for `bar`
   --> $DIR/deadlock.rs:4:5
    |
+LL | use bar::foo;
+   |     ^^^ can't find crate
+
+error[E0463]: can't find crate for `foo`
+  --> $DIR/deadlock.rs:5:5
+   |
 LL | use foo::bar;
    |     ^^^ can't find crate
 
-error: aborting due to previous error
+error[E0432]: unresolved imports `bar::foo`, `foo::bar`
+  --> $DIR/deadlock.rs:4:5
+   |
+LL | use bar::foo;
+   |     ^^^^^^^^
+LL | use foo::bar;
+   |     ^^^^^^^^
 
-For more information about this error, try `rustc --explain E0463`.
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0432, E0463.
+For more information about an error, try `rustc --explain E0432`.

src/test/ui/svh/changing-crates.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:changing-crates-a1.rs
 // aux-build:changing-crates-b.rs

src/test/ui/svh/changing-crates.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/changing-crates.rs:10:1
+  --> $DIR/changing-crates.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-lit.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-lit.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-lit.rs:10:1
+  --> $DIR/svh-change-lit.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-significant-cfg.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-significant-cfg.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-significant-cfg.rs:10:1
+  --> $DIR/svh-change-significant-cfg.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-trait-bound.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-trait-bound.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-trait-bound.rs:10:1
+  --> $DIR/svh-change-trait-bound.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-type-arg.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-type-arg.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-type-arg.rs:10:1
+  --> $DIR/svh-change-type-arg.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-type-ret.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-type-ret.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-type-ret.rs:10:1
+  --> $DIR/svh-change-type-ret.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-change-type-static.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-a-base.rs
 // aux-build:svh-b.rs

src/test/ui/svh/svh-change-type-static.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `a` which `b` depends on
-  --> $DIR/svh-change-type-static.rs:10:1
+  --> $DIR/svh-change-type-static.rs:8:1
    |
 LL | extern crate b;
    | ^^^^^^^^^^^^^^^

src/test/ui/svh/svh-use-trait.rs

@@ -1,5 +1,3 @@
-// ignore-msvc FIXME #31306
-
 // note that these aux-build directives must be in this order
 // aux-build:svh-uta-base.rs
 // aux-build:svh-utb.rs

src/test/ui/svh/svh-use-trait.stderr

@@ -1,5 +1,5 @@
 error[E0460]: found possibly newer version of crate `uta` which `utb` depends on
-  --> $DIR/svh-use-trait.rs:15:1
+  --> $DIR/svh-use-trait.rs:13:1
    |
 LL | extern crate utb;
    | ^^^^^^^^^^^^^^^^^