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Auto merge of #129841 - matthiaskrgr:rollup-pkavdtl, r=matthiaskrgr

Browse Source 
Rollup of 8 pull requests

Successful merges:

 - #128495 (core: use `compare_bytes` for more slice element types)
 - #128641 (refactor: standardize duplicate processes in parser)
 - #129207 (Lint that warns when an elided lifetime ends up being a named lifetime)
 - #129493 (Create opaque definitions in resolver.)
 - #129619 (Update stacker to 0.1.17)
 - #129672 (Make option-like-enum.rs UB-free and portable)
 - #129780 (add crashtests for several old unfixed ICEs)
 - #129832 (Remove stray dot in `std::char::from_u32_unchecked` documentation)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2024-09-01 04:21:26 +00:00
commit 78d5c04d9c
77 changed files with 875 additions and 233 deletions
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6
Cargo.lock
View File

@ -4978,15 +4978,15 @@ dependencies = [
[[package]]
name = "stacker"
version = "0.1.15"
version = "0.1.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c886bd4480155fd3ef527d45e9ac8dd7118a898a46530b7b94c3e21866259fce"
checksum = "799c883d55abdb5e98af1a7b3f23b9b6de8ecada0ecac058672d7635eb48ca7b"
dependencies = [
"cc",
"cfg-if",
"libc",
"psm",
"winapi",
"windows-sys 0.59.0",
]
[[package]]

16
compiler/rustc_ast/src/visit.rs
View File

@ -69,14 +69,14 @@ pub enum FnKind<'a> {
Fn(FnCtxt, Ident, &'a FnSig, &'a Visibility, &'a Generics, Option<&'a Block>),
/// E.g., `|x, y| body`.
Closure(&'a ClosureBinder, &'a FnDecl, &'a Expr),
Closure(&'a ClosureBinder, &'a Option<CoroutineKind>, &'a FnDecl, &'a Expr),
}
impl<'a> FnKind<'a> {
pub fn header(&self) -> Option<&'a FnHeader> {
match *self {
FnKind::Fn(_, _, sig, _, _, _) => Some(&sig.header),
FnKind::Closure(_, _, _) => None,
FnKind::Closure(..) => None,
}
}
@ -90,7 +90,7 @@ impl<'a> FnKind<'a> {
pub fn decl(&self) -> &'a FnDecl {
match self {
FnKind::Fn(_, _, sig, _, _, _) => &sig.decl,
FnKind::Closure(_, decl, _) => decl,
FnKind::Closure(_, _, decl, _) => decl,
}
}
@ -839,7 +839,7 @@ pub fn walk_fn<'a, V: Visitor<'a>>(visitor: &mut V, kind: FnKind<'a>) -> V::Resu
try_visit!(walk_fn_decl(visitor, decl));
visit_opt!(visitor, visit_block, body);
}
FnKind::Closure(binder, decl, body) => {
FnKind::Closure(binder, _coroutine_kind, decl, body) => {
try_visit!(visitor.visit_closure_binder(binder));
try_visit!(walk_fn_decl(visitor, decl));
try_visit!(visitor.visit_expr(body));
@ -1107,7 +1107,7 @@ pub fn walk_expr<'a, V: Visitor<'a>>(visitor: &mut V, expression: &'a Expr) -> V
ExprKind::Closure(box Closure {
binder,
capture_clause,
coroutine_kind: _,
coroutine_kind,
constness: _,
movability: _,
fn_decl,
@ -1116,7 +1116,11 @@ pub fn walk_expr<'a, V: Visitor<'a>>(visitor: &mut V, expression: &'a Expr) -> V
fn_arg_span: _,
}) => {
try_visit!(visitor.visit_capture_by(capture_clause));
try_visit!(visitor.visit_fn(FnKind::Closure(binder, fn_decl, body), *span, *id))
try_visit!(visitor.visit_fn(
FnKind::Closure(binder, coroutine_kind, fn_decl, body),
*span,
*id
))
}
ExprKind::Block(block, opt_label) => {
visit_opt!(visitor, visit_label, opt_label);

36
compiler/rustc_ast_lowering/src/lib.rs
View File

@ -45,7 +45,6 @@ use std::collections::hash_map::Entry;
use rustc_ast::node_id::NodeMap;
use rustc_ast::ptr::P;
use rustc_ast::{self as ast, *};
use rustc_ast_pretty::pprust;
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::FxIndexSet;
@ -837,7 +836,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
(hir::ParamName::Fresh, hir::LifetimeParamKind::Elided(kind))
}
LifetimeRes::Static | LifetimeRes::Error => return None,
LifetimeRes::Static { .. } | LifetimeRes::Error => return None,
res => panic!(
"Unexpected lifetime resolution {:?} for {:?} at {:?}",
res, ident, ident.span
@ -1399,24 +1398,9 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
self.tcx.dcx().emit_err(errors::NoPreciseCapturesOnApit { span });
}
let span = t.span;
// HACK: pprust breaks strings with newlines when the type
// gets too long. We don't want these to show up in compiler
// output or built artifacts, so replace them here...
// Perhaps we should instead format APITs more robustly.
let ident = Ident::from_str_and_span(
&pprust::ty_to_string(t).replace('\n', " "),
span,
);
self.create_def(
self.current_hir_id_owner.def_id, // FIXME: should this use self.current_def_id_parent?
*def_node_id,
ident.name,
DefKind::TyParam,
span,
);
let def_id = self.local_def_id(*def_node_id);
let name = self.tcx.item_name(def_id.to_def_id());
let ident = Ident::new(name, span);
let (param, bounds, path) = self.lower_universal_param_and_bounds(
*def_node_id,
span,
@ -1618,13 +1602,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
opaque_ty_span: Span,
lower_item_bounds: impl FnOnce(&mut Self) -> &'hir [hir::GenericBound<'hir>],
) -> hir::TyKind<'hir> {
let opaque_ty_def_id = self.create_def(
self.current_hir_id_owner.def_id, // FIXME: should this use self.current_def_id_parent?
opaque_ty_node_id,
kw::Empty,
DefKind::OpaqueTy,
opaque_ty_span,
);
let opaque_ty_def_id = self.local_def_id(opaque_ty_node_id);
debug!(?opaque_ty_def_id);
// Map from captured (old) lifetime to synthetic (new) lifetime.
@ -1656,7 +1634,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
// Opaques do not capture `'static`
LifetimeRes::Static | LifetimeRes::Error => {
LifetimeRes::Static { .. } | LifetimeRes::Error => {
continue;
}
@ -2069,7 +2047,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
hir::LifetimeName::Param(param)
}
LifetimeRes::Infer => hir::LifetimeName::Infer,
LifetimeRes::Static => hir::LifetimeName::Static,
LifetimeRes::Static { .. } => hir::LifetimeName::Static,
LifetimeRes::Error => hir::LifetimeName::Error,
res => panic!(
"Unexpected lifetime resolution {:?} for {:?} at {:?}",

2
compiler/rustc_ast_lowering/src/lifetime_collector.rs
View File

@ -27,7 +27,7 @@ impl<'ast> LifetimeCollectVisitor<'ast> {
self.collected_lifetimes.insert(lifetime);
}
}
LifetimeRes::Static | LifetimeRes::Error => {
LifetimeRes::Static { .. } | LifetimeRes::Error => {
self.collected_lifetimes.insert(lifetime);
}
LifetimeRes::Infer => {}

2
compiler/rustc_ast_passes/src/ast_validation.rs
View File

@ -1485,7 +1485,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
let disallowed = (!tilde_const_allowed).then(|| match fk {
FnKind::Fn(_, ident, _, _, _, _) => TildeConstReason::Function { ident: ident.span },
FnKind::Closure(_, _, _) => TildeConstReason::Closure,
FnKind::Closure(..) => TildeConstReason::Closure,
});
self.with_tilde_const(disallowed, |this| visit::walk_fn(this, fk));
}

2
compiler/rustc_data_structures/Cargo.toml
View File

@ -22,7 +22,7 @@ rustc_index = { path = "../rustc_index", package = "rustc_index" }
rustc_macros = { path = "../rustc_macros" }
rustc_serialize = { path = "../rustc_serialize" }
smallvec = { version = "1.8.1", features = ["const_generics", "union", "may_dangle"] }
stacker = "0.1.15"
stacker = "0.1.17"
tempfile = "3.2"
thin-vec = "0.2.12"
tracing = "0.1"

9
compiler/rustc_hir/src/def.rs
View File

@ -863,8 +863,13 @@ pub enum LifetimeRes {
/// This variant is used for anonymous lifetimes that we did not resolve during
/// late resolution. Those lifetimes will be inferred by typechecking.
Infer,
/// Explicit `'static` lifetime.
Static,
/// `'static` lifetime.
Static {
/// We do not want to emit `elided_named_lifetimes`
/// when we are inside of a const item or a static,
/// because it would get too annoying.
suppress_elision_warning: bool,
},
/// Resolution failure.
Error,
/// HACK: This is used to recover the NodeId of an elided lifetime.

4
compiler/rustc_lint/messages.ftl
View File

@ -252,6 +252,10 @@ lint_duplicate_macro_attribute =
lint_duplicate_matcher_binding = duplicate matcher binding
lint_elided_named_lifetime = elided lifetime has a name
.label_elided = this elided lifetime gets resolved as `{$name}`
.label_named = lifetime `{$name}` declared here
lint_enum_intrinsics_mem_discriminant =
the return value of `mem::discriminant` is unspecified when called with a non-enum type
.note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum

13
compiler/rustc_lint/src/context/diagnostics.rs
View File

@ -10,6 +10,7 @@ use rustc_errors::{
use rustc_middle::middle::stability;
use rustc_session::lint::BuiltinLintDiag;
use rustc_session::Session;
use rustc_span::symbol::kw;
use rustc_span::BytePos;
use tracing::debug;
@ -441,5 +442,17 @@ pub(super) fn decorate_lint(sess: &Session, diagnostic: BuiltinLintDiag, diag: &
BuiltinLintDiag::UnexpectedBuiltinCfg { cfg, cfg_name, controlled_by } => {
lints::UnexpectedBuiltinCfg { cfg, cfg_name, controlled_by }.decorate_lint(diag)
}
BuiltinLintDiag::ElidedIsStatic { elided } => {
lints::ElidedNamedLifetime { elided, name: kw::StaticLifetime, named_declaration: None }
.decorate_lint(diag)
}
BuiltinLintDiag::ElidedIsParam { elided, param: (param_name, param_span) } => {
lints::ElidedNamedLifetime {
elided,
name: param_name,
named_declaration: Some(param_span),
}
.decorate_lint(diag)
}
}
}

10
compiler/rustc_lint/src/lints.rs
View File

@ -2611,6 +2611,16 @@ pub(crate) struct ElidedLifetimesInPaths {
pub subdiag: ElidedLifetimeInPathSubdiag,
}
#[derive(LintDiagnostic)]
#[diag(lint_elided_named_lifetime)]
pub(crate) struct ElidedNamedLifetime {
#[label(lint_label_elided)]
pub elided: Span,
pub name: Symbol,
#[label(lint_label_named)]
pub named_declaration: Option<Span>,
}
#[derive(LintDiagnostic)]
#[diag(lint_invalid_crate_type_value)]
pub(crate) struct UnknownCrateTypes {

33
compiler/rustc_lint_defs/src/builtin.rs
View File

@ -42,6 +42,7 @@ declare_lint_pass! {
DUPLICATE_MACRO_ATTRIBUTES,
ELIDED_LIFETIMES_IN_ASSOCIATED_CONSTANT,
ELIDED_LIFETIMES_IN_PATHS,
ELIDED_NAMED_LIFETIMES,
EXPLICIT_BUILTIN_CFGS_IN_FLAGS,
EXPORTED_PRIVATE_DEPENDENCIES,
FFI_UNWIND_CALLS,
@ -1862,6 +1863,38 @@ declare_lint! {
"hidden lifetime parameters in types are deprecated"
}
declare_lint! {
/// The `elided_named_lifetimes` lint detects when an elided
/// lifetime ends up being a named lifetime, such as `'static`
/// or some lifetime parameter `'a`.
///
/// ### Example
///
/// ```rust,compile_fail
/// #![deny(elided_named_lifetimes)]
/// struct Foo;
/// impl Foo {
/// pub fn get_mut(&'static self, x: &mut u8) -> &mut u8 {
/// unsafe { &mut *(x as *mut _) }
/// }
/// }
/// ```
///
/// {{produces}}
///
/// ### Explanation
///
/// Lifetime elision is quite useful, because it frees you from having
/// to give each lifetime its own name, but sometimes it can produce
/// somewhat surprising resolutions. In safe code, it is mostly okay,
/// because the borrow checker prevents any unsoundness, so the worst
/// case scenario is you get a confusing error message in some other place.
/// But with `unsafe` code, such unexpected resolutions may lead to unsound code.
pub ELIDED_NAMED_LIFETIMES,
Warn,
"detects when an elided lifetime gets resolved to be `'static` or some named parameter"
}
declare_lint! {
/// The `bare_trait_objects` lint suggests using `dyn Trait` for trait
/// objects.

7
compiler/rustc_lint_defs/src/lib.rs
View File

@ -589,6 +589,13 @@ pub enum BuiltinLintDiag {
},
MacroExpandedMacroExportsAccessedByAbsolutePaths(Span),
ElidedLifetimesInPaths(usize, Span, bool, Span),
ElidedIsStatic {
elided: Span,
},
ElidedIsParam {
elided: Span,
param: (Symbol, Span),
},
UnknownCrateTypes {
span: Span,
candidate: Option<Symbol>,

116
compiler/rustc_resolve/src/def_collector.rs
View File

@ -2,6 +2,7 @@ use std::mem;
use rustc_ast::visit::FnKind;
use rustc_ast::*;
use rustc_ast_pretty::pprust;
use rustc_expand::expand::AstFragment;
use rustc_hir as hir;
use rustc_hir::def::{CtorKind, CtorOf, DefKind};
@ -120,8 +121,6 @@ impl<'a, 'b, 'tcx> DefCollector<'a, 'b, 'tcx> {
impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
fn visit_item(&mut self, i: &'a Item) {
debug!("visit_item: {:?}", i);
// Pick the def data. This need not be unique, but the more
// information we encapsulate into, the better
let mut opt_macro_data = None;
@ -183,38 +182,51 @@ impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
}
fn visit_fn(&mut self, fn_kind: FnKind<'a>, span: Span, _: NodeId) {
if let FnKind::Fn(_, _, sig, _, generics, body) = fn_kind {
match sig.header.coroutine_kind {
Some(coroutine_kind) => {
self.visit_generics(generics);
match fn_kind {
FnKind::Fn(_ctxt, _ident, FnSig { header, decl, span: _ }, _vis, generics, body)
if let Some(coroutine_kind) = header.coroutine_kind =>
{
self.visit_fn_header(header);
self.visit_generics(generics);
// For async functions, we need to create their inner defs inside of a
// closure to match their desugared representation. Besides that,
// we must mirror everything that `visit::walk_fn` below does.
self.visit_fn_header(&sig.header);
for param in &sig.decl.inputs {
self.visit_param(param);
}
self.visit_fn_ret_ty(&sig.decl.output);
// If this async fn has no body (i.e. it's an async fn signature in a trait)
// then the closure_def will never be used, and we should avoid generating a
// def-id for it.
if let Some(body) = body {
let closure_def = self.create_def(
coroutine_kind.closure_id(),
kw::Empty,
DefKind::Closure,
span,
);
self.with_parent(closure_def, |this| this.visit_block(body));
}
return;
// For async functions, we need to create their inner defs inside of a
// closure to match their desugared representation. Besides that,
// we must mirror everything that `visit::walk_fn` below does.
let FnDecl { inputs, output } = &**decl;
for param in inputs {
self.visit_param(param);
}
None => {}
}
}
visit::walk_fn(self, fn_kind);
let (return_id, return_span) = coroutine_kind.return_id();
let return_def =
self.create_def(return_id, kw::Empty, DefKind::OpaqueTy, return_span);
self.with_parent(return_def, |this| this.visit_fn_ret_ty(output));
// If this async fn has no body (i.e. it's an async fn signature in a trait)
// then the closure_def will never be used, and we should avoid generating a
// def-id for it.
if let Some(body) = body {
let closure_def = self.create_def(
coroutine_kind.closure_id(),
kw::Empty,
DefKind::Closure,
span,
);
self.with_parent(closure_def, |this| this.visit_block(body));
}
}
FnKind::Closure(binder, Some(coroutine_kind), decl, body) => {
self.visit_closure_binder(binder);
visit::walk_fn_decl(self, decl);
// Async closures desugar to closures inside of closures, so
// we must create two defs.
let coroutine_def =
self.create_def(coroutine_kind.closure_id(), kw::Empty, DefKind::Closure, span);
self.with_parent(coroutine_def, |this| visit::walk_expr(this, body));
}
_ => visit::walk_fn(self, fn_kind),
}
}
fn visit_use_tree(&mut self, use_tree: &'a UseTree, id: NodeId, _nested: bool) {
@ -334,27 +346,7 @@ impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
fn visit_expr(&mut self, expr: &'a Expr) {
let parent_def = match expr.kind {
ExprKind::MacCall(..) => return self.visit_macro_invoc(expr.id),
ExprKind::Closure(ref closure) => {
// Async closures desugar to closures inside of closures, so
// we must create two defs.
let closure_def = self.create_def(expr.id, kw::Empty, DefKind::Closure, expr.span);
match closure.coroutine_kind {
Some(coroutine_kind) => {
self.with_parent(closure_def, |this| {
let coroutine_def = this.create_def(
coroutine_kind.closure_id(),
kw::Empty,
DefKind::Closure,
expr.span,
);
this.with_parent(coroutine_def, |this| visit::walk_expr(this, expr));
});
return;
}
None => closure_def,
}
}
ExprKind::Gen(_, _, _, _) => {
ExprKind::Closure(..) | ExprKind::Gen(..) => {
self.create_def(expr.id, kw::Empty, DefKind::Closure, expr.span)
}
ExprKind::ConstBlock(ref constant) => {
@ -381,6 +373,26 @@ impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
TyKind::MacCall(..) => self.visit_macro_invoc(ty.id),
// Anonymous structs or unions are visited later after defined.
TyKind::AnonStruct(..) | TyKind::AnonUnion(..) => {}
TyKind::ImplTrait(id, _) => {
// HACK: pprust breaks strings with newlines when the type
// gets too long. We don't want these to show up in compiler
// output or built artifacts, so replace them here...
// Perhaps we should instead format APITs more robustly.
let name = Symbol::intern(&pprust::ty_to_string(ty).replace('\n', " "));
let kind = match self.impl_trait_context {
ImplTraitContext::Universal => DefKind::TyParam,
ImplTraitContext::Existential => DefKind::OpaqueTy,
};
let id = self.create_def(*id, name, kind, ty.span);
match self.impl_trait_context {
// Do not nest APIT, as we desugar them as `impl_trait: bounds`,
// so the `impl_trait` node is not a parent to `bounds`.
ImplTraitContext::Universal => visit::walk_ty(self, ty),
ImplTraitContext::Existential => {
self.with_parent(id, |this| visit::walk_ty(this, ty))
}
};
}
_ => visit::walk_ty(self, ty),
}
}

81
compiler/rustc_resolve/src/late.rs
View File

@ -1010,7 +1010,7 @@ impl<'a: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'a, '_, 'ast,
this.in_func_body = previous_state;
}
}
FnKind::Closure(binder, declaration, body) => {
FnKind::Closure(binder, _, declaration, body) => {
this.visit_closure_binder(binder);
this.with_lifetime_rib(
@ -1557,14 +1557,14 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
if ident.name == kw::StaticLifetime {
self.record_lifetime_res(
lifetime.id,
LifetimeRes::Static,
LifetimeRes::Static { suppress_elision_warning: false },
LifetimeElisionCandidate::Named,
);
return;
}
if ident.name == kw::UnderscoreLifetime {
return self.resolve_anonymous_lifetime(lifetime, false);
return self.resolve_anonymous_lifetime(lifetime, lifetime.id, false);
}
let mut lifetime_rib_iter = self.lifetime_ribs.iter().rev();
@ -1667,13 +1667,23 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
}
#[instrument(level = "debug", skip(self))]
fn resolve_anonymous_lifetime(&mut self, lifetime: &Lifetime, elided: bool) {
fn resolve_anonymous_lifetime(
&mut self,
lifetime: &Lifetime,
id_for_lint: NodeId,
elided: bool,
) {
debug_assert_eq!(lifetime.ident.name, kw::UnderscoreLifetime);
let kind =
if elided { MissingLifetimeKind::Ampersand } else { MissingLifetimeKind::Underscore };
let missing_lifetime =
MissingLifetime { id: lifetime.id, span: lifetime.ident.span, kind, count: 1 };
let missing_lifetime = MissingLifetime {
id: lifetime.id,
span: lifetime.ident.span,
kind,
count: 1,
id_for_lint,
};
let elision_candidate = LifetimeElisionCandidate::Missing(missing_lifetime);
for (i, rib) in self.lifetime_ribs.iter().enumerate().rev() {
debug!(?rib.kind);
@ -1697,7 +1707,8 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
if lifetimes_in_scope.is_empty() {
self.record_lifetime_res(
lifetime.id,
LifetimeRes::Static,
// We are inside a const item, so do not warn.
LifetimeRes::Static { suppress_elision_warning: true },
elision_candidate,
);
return;
@ -1800,7 +1811,7 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
LifetimeRes::ElidedAnchor { start: id, end: NodeId::from_u32(id.as_u32() + 1) },
LifetimeElisionCandidate::Ignore,
);
self.resolve_anonymous_lifetime(&lt, true);
self.resolve_anonymous_lifetime(&lt, anchor_id, true);
}
#[instrument(level = "debug", skip(self))]
@ -1916,6 +1927,7 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
};
let missing_lifetime = MissingLifetime {
id: node_ids.start,
id_for_lint: segment_id,
span: elided_lifetime_span,
kind,
count: expected_lifetimes,
@ -2039,8 +2051,44 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
if let Some(prev_res) = self.r.lifetimes_res_map.insert(id, res) {
panic!("lifetime {id:?} resolved multiple times ({prev_res:?} before, {res:?} now)")
}
match candidate {
LifetimeElisionCandidate::Missing(missing @ MissingLifetime { .. }) => {
debug_assert_eq!(id, missing.id);
match res {
LifetimeRes::Static { suppress_elision_warning } => {
if !suppress_elision_warning {
self.r.lint_buffer.buffer_lint(
lint::builtin::ELIDED_NAMED_LIFETIMES,
missing.id_for_lint,
missing.span,
BuiltinLintDiag::ElidedIsStatic { elided: missing.span },
);
}
}
LifetimeRes::Param { param, binder: _ } => {
let tcx = self.r.tcx();
self.r.lint_buffer.buffer_lint(
lint::builtin::ELIDED_NAMED_LIFETIMES,
missing.id_for_lint,
missing.span,
BuiltinLintDiag::ElidedIsParam {
elided: missing.span,
param: (tcx.item_name(param.into()), tcx.source_span(param)),
},
);
}
LifetimeRes::Fresh { .. }
| LifetimeRes::Infer
| LifetimeRes::Error
| LifetimeRes::ElidedAnchor { .. } => {}
}
}
LifetimeElisionCandidate::Ignore | LifetimeElisionCandidate::Named => {}
}
match res {
LifetimeRes::Param { .. } | LifetimeRes::Fresh { .. } | LifetimeRes::Static => {
LifetimeRes::Param { .. } | LifetimeRes::Fresh { .. } | LifetimeRes::Static { .. } => {
if let Some(ref mut candidates) = self.lifetime_elision_candidates {
candidates.push((res, candidate));
}
@ -2558,9 +2606,14 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
ItemKind::Static(box ast::StaticItem { ref ty, ref expr, .. }) => {
self.with_static_rib(def_kind, |this| {
this.with_lifetime_rib(LifetimeRibKind::Elided(LifetimeRes::Static), |this| {
this.visit_ty(ty);
});
this.with_lifetime_rib(
LifetimeRibKind::Elided(LifetimeRes::Static {
suppress_elision_warning: true,
}),
|this| {
this.visit_ty(ty);
},
);
if let Some(expr) = expr {
// We already forbid generic params because of the above item rib,
// so it doesn't matter whether this is a trivial constant.
@ -2589,7 +2642,9 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
this.visit_generics(generics);
this.with_lifetime_rib(
LifetimeRibKind::Elided(LifetimeRes::Static),
LifetimeRibKind::Elided(LifetimeRes::Static {
suppress_elision_warning: true,
}),
|this| this.visit_ty(ty),
);

11
compiler/rustc_resolve/src/late/diagnostics.rs
View File

@ -102,6 +102,13 @@ fn import_candidate_to_enum_paths(suggestion: &ImportSuggestion) -> (String, Str
pub(super) struct MissingLifetime {
/// Used to overwrite the resolution with the suggestion, to avoid cascading errors.
pub id: NodeId,
/// As we cannot yet emit lints in this crate and have to buffer them instead,
/// we need to associate each lint with some `NodeId`,
/// however for some `MissingLifetime`s their `NodeId`s are "fake",
/// in a sense that they are temporary and not get preserved down the line,
/// which means that the lints for those nodes will not get emitted.
/// To combat this, we can try to use some other `NodeId`s as a fallback option.
pub id_for_lint: NodeId,
/// Where to suggest adding the lifetime.
pub span: Span,
/// How the lifetime was introduced, to have the correct space and comma.
@ -3028,7 +3035,7 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> {
maybe_static = true;
in_scope_lifetimes = vec![(
Ident::with_dummy_span(kw::StaticLifetime),
(DUMMY_NODE_ID, LifetimeRes::Static),
(DUMMY_NODE_ID, LifetimeRes::Static { suppress_elision_warning: false }),
)];
}
} else if elided_len == 0 {
@ -3040,7 +3047,7 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> {
maybe_static = true;
in_scope_lifetimes = vec![(
Ident::with_dummy_span(kw::StaticLifetime),
(DUMMY_NODE_ID, LifetimeRes::Static),
(DUMMY_NODE_ID, LifetimeRes::Static { suppress_elision_warning: false }),
)];
}
} else if num_params == 1 {

2
library/alloc/src/string.rs
View File

@ -2313,7 +2313,7 @@ impl<'b> Pattern for &'b String {
}
#[inline]
fn strip_suffix_of<'a>(self, haystack: &'a str) -> Option<&str>
fn strip_suffix_of<'a>(self, haystack: &'a str) -> Option<&'a str>
where
Self::Searcher<'a>: core::str::pattern::ReverseSearcher<'a>,
{

2
library/core/src/char/mod.rs
View File

@ -122,7 +122,7 @@ pub const fn from_u32(i: u32) -> Option<char> {
self::convert::from_u32(i)
}
/// Converts a `u32` to a `char`, ignoring validity. Use [`char::from_u32_unchecked`].
/// Converts a `u32` to a `char`, ignoring validity. Use [`char::from_u32_unchecked`]
/// instead.
#[stable(feature = "char_from_unchecked", since = "1.5.0")]
#[rustc_const_stable(feature = "const_char_from_u32_unchecked", since = "1.81.0")]

20
library/core/src/fmt/rt.rs
View File

@ -110,43 +110,43 @@ impl<'a> Argument<'a> {
}
#[inline(always)]
pub fn new_display<'b, T: Display>(x: &'b T) -> Argument<'_> {
pub fn new_display<'b, T: Display>(x: &'b T) -> Argument<'b> {
Self::new(x, Display::fmt)
}
#[inline(always)]
pub fn new_debug<'b, T: Debug>(x: &'b T) -> Argument<'_> {
pub fn new_debug<'b, T: Debug>(x: &'b T) -> Argument<'b> {
Self::new(x, Debug::fmt)
}
#[inline(always)]
pub fn new_debug_noop<'b, T: Debug>(x: &'b T) -> Argument<'_> {
pub fn new_debug_noop<'b, T: Debug>(x: &'b T) -> Argument<'b> {
Self::new(x, |_, _| Ok(()))
}
#[inline(always)]
pub fn new_octal<'b, T: Octal>(x: &'b T) -> Argument<'_> {
pub fn new_octal<'b, T: Octal>(x: &'b T) -> Argument<'b> {
Self::new(x, Octal::fmt)
}
#[inline(always)]
pub fn new_lower_hex<'b, T: LowerHex>(x: &'b T) -> Argument<'_> {
pub fn new_lower_hex<'b, T: LowerHex>(x: &'b T) -> Argument<'b> {
Self::new(x, LowerHex::fmt)
}
#[inline(always)]
pub fn new_upper_hex<'b, T: UpperHex>(x: &'b T) -> Argument<'_> {
pub fn new_upper_hex<'b, T: UpperHex>(x: &'b T) -> Argument<'b> {
Self::new(x, UpperHex::fmt)
}
#[inline(always)]
pub fn new_pointer<'b, T: Pointer>(x: &'b T) -> Argument<'_> {
pub fn new_pointer<'b, T: Pointer>(x: &'b T) -> Argument<'b> {
Self::new(x, Pointer::fmt)
}
#[inline(always)]
pub fn new_binary<'b, T: Binary>(x: &'b T) -> Argument<'_> {
pub fn new_binary<'b, T: Binary>(x: &'b T) -> Argument<'b> {
Self::new(x, Binary::fmt)
}
#[inline(always)]
pub fn new_lower_exp<'b, T: LowerExp>(x: &'b T) -> Argument<'_> {
pub fn new_lower_exp<'b, T: LowerExp>(x: &'b T) -> Argument<'b> {
Self::new(x, LowerExp::fmt)
}
#[inline(always)]
pub fn new_upper_exp<'b, T: UpperExp>(x: &'b T) -> Argument<'_> {
pub fn new_upper_exp<'b, T: UpperExp>(x: &'b T) -> Argument<'b> {
Self::new(x, UpperExp::fmt)
}
#[inline(always)]

54
library/core/src/net/parser.rs
View File

@ -112,18 +112,18 @@ impl<'a> Parser<'a> {
max_digits: Option<usize>,
allow_zero_prefix: bool,
) -> Option<T> {
// If max_digits.is_some(), then we are parsing a `u8` or `u16` and
// don't need to use checked arithmetic since it fits within a `u32`.
if let Some(max_digits) = max_digits {
// u32::MAX = 4_294_967_295u32, which is 10 digits long.
// `max_digits` must be less than 10 to not overflow a `u32`.
debug_assert!(max_digits < 10);
self.read_atomically(move |p| {
let mut digit_count = 0;
let has_leading_zero = p.peek_char() == Some('0');
// If max_digits.is_some(), then we are parsing a `u8` or `u16` and
// don't need to use checked arithmetic since it fits within a `u32`.
let result = if let Some(max_digits) = max_digits {
// u32::MAX = 4_294_967_295u32, which is 10 digits long.
// `max_digits` must be less than 10 to not overflow a `u32`.
debug_assert!(max_digits < 10);
self.read_atomically(move |p| {
let mut result = 0_u32;
let mut digit_count = 0;
let has_leading_zero = p.peek_char() == Some('0');
while let Some(digit) = p.read_atomically(|p| p.read_char()?.to_digit(radix)) {
result *= radix;
result += digit;
@ -134,19 +134,9 @@ impl<'a> Parser<'a> {
}
}
if digit_count == 0 {
None
} else if !allow_zero_prefix && has_leading_zero && digit_count > 1 {
None
} else {
result.try_into().ok()
}
})
} else {
self.read_atomically(move |p| {
result.try_into().ok()
} else {
let mut result = T::ZERO;
let mut digit_count = 0;
let has_leading_zero = p.peek_char() == Some('0');
while let Some(digit) = p.read_atomically(|p| p.read_char()?.to_digit(radix)) {
result = result.checked_mul(radix)?;
@ -154,15 +144,17 @@ impl<'a> Parser<'a> {
digit_count += 1;
}
if digit_count == 0 {
None
} else if !allow_zero_prefix && has_leading_zero && digit_count > 1 {
None
} else {
Some(result)
}
})
}
Some(result)
};
if digit_count == 0 {
None
} else if !allow_zero_prefix && has_leading_zero && digit_count > 1 {
None
} else {
result
}
})
}
/// Reads an IPv4 address.

43
library/core/src/slice/cmp.rs
View File

@ -3,7 +3,8 @@
use super::{from_raw_parts, memchr};
use crate::cmp::{self, BytewiseEq, Ordering};
use crate::intrinsics::compare_bytes;
use crate::mem;
use crate::num::NonZero;
use crate::{ascii, mem};
#[stable(feature = "rust1", since = "1.0.0")]
impl<T, U> PartialEq<[U]> for [T]
@ -182,19 +183,41 @@ impl<A: Ord> SliceOrd for A {
}
}
// `compare_bytes` compares a sequence of unsigned bytes lexicographically.
// this matches the order we want for [u8], but no others (not even [i8]).
impl SliceOrd for u8 {
/// Marks that a type should be treated as an unsigned byte for comparisons.
///
/// # Safety
/// * The type must be readable as an `u8`, meaning it has to have the same
/// layout as `u8` and always be initialized.
/// * For every `x` and `y` of this type, `Ord(x, y)` must return the same
/// value as `Ord::cmp(transmute::<_, u8>(x), transmute::<_, u8>(y))`.
#[rustc_specialization_trait]
unsafe trait UnsignedBytewiseOrd {}
unsafe impl UnsignedBytewiseOrd for bool {}
unsafe impl UnsignedBytewiseOrd for u8 {}
unsafe impl UnsignedBytewiseOrd for NonZero<u8> {}
unsafe impl UnsignedBytewiseOrd for Option<NonZero<u8>> {}
unsafe impl UnsignedBytewiseOrd for ascii::Char {}
// `compare_bytes` compares a sequence of unsigned bytes lexicographically, so
// use it if the requirements for `UnsignedBytewiseOrd` are fulfilled.
impl<A: Ord + UnsignedBytewiseOrd> SliceOrd for A {
#[inline]
fn compare(left: &[Self], right: &[Self]) -> Ordering {
// Since the length of a slice is always less than or equal to isize::MAX, this never underflows.
// Since the length of a slice is always less than or equal to
// isize::MAX, this never underflows.
let diff = left.len() as isize - right.len() as isize;
// This comparison gets optimized away (on x86_64 and ARM) because the subtraction updates flags.
// This comparison gets optimized away (on x86_64 and ARM) because the
// subtraction updates flags.
let len = if left.len() < right.len() { left.len() } else { right.len() };
// SAFETY: `left` and `right` are references and are thus guaranteed to be valid.
// We use the minimum of both lengths which guarantees that both regions are
// valid for reads in that interval.
let mut order = unsafe { compare_bytes(left.as_ptr(), right.as_ptr(), len) as isize };
let left = left.as_ptr().cast();
let right = right.as_ptr().cast();
// SAFETY: `left` and `right` are references and are thus guaranteed to
// be valid. `UnsignedBytewiseOrd` is only implemented for types that
// are valid u8s and can be compared the same way. We use the minimum
// of both lengths which guarantees that both regions are valid for
// reads in that interval.
let mut order = unsafe { compare_bytes(left, right, len) as isize };
if order == 0 {
order = diff;
}

13
src/tools/clippy/tests/ui/needless_lifetimes.stderr
View File

@ -1,3 +1,14 @@
error: elided lifetime has a name
--> tests/ui/needless_lifetimes.rs:266:52
|
LL | fn named_input_elided_output<'a>(_arg: &'a str) -> &str {
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
= note: `-D elided-named-lifetimes` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(elided_named_lifetimes)]`
error: the following explicit lifetimes could be elided: 'a, 'b
--> tests/ui/needless_lifetimes.rs:17:23
|
@ -553,5 +564,5 @@ LL - fn one_input<'a>(x: &'a u8) -> &'a u8 {
LL + fn one_input(x: &u8) -> &u8 {
|
error: aborting due to 46 previous errors
error: aborting due to 47 previous errors

11
src/tools/clippy/tests/ui/ptr_arg.stderr
View File

@ -1,3 +1,12 @@
error: elided lifetime has a name
--> tests/ui/ptr_arg.rs:295:56
|
LL | fn cow_good_ret_ty<'a>(input: &'a Cow<'a, str>) -> &str {
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `-D elided-named-lifetimes` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(elided_named_lifetimes)]`
error: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
--> tests/ui/ptr_arg.rs:13:14
|
@ -212,5 +221,5 @@ error: using a reference to `Cow` is not recommended
LL | fn cow_bad_ret_ty_2<'a, 'b>(input: &'a Cow<'a, str>) -> &'b str {
| ^^^^^^^^^^^^^^^^ help: change this to: `&str`
error: aborting due to 24 previous errors
error: aborting due to 25 previous errors

4
src/tools/miri/tests/fail/uninit/uninit_alloc_diagnostic.stderr
View File

@ -1,8 +1,8 @@
error: Undefined Behavior: reading memory at ALLOC[0x0..0x10], but memory is uninitialized at [0x4..0x10], and this operation requires initialized memory
--> RUSTLIB/core/src/slice/cmp.rs:LL:CC
|
LL | let mut order = unsafe { compare_bytes(left.as_ptr(), right.as_ptr(), len) as isize };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reading memory at ALLOC[0x0..0x10], but memory is uninitialized at [0x4..0x10], and this operation requires initialized memory
LL | let mut order = unsafe { compare_bytes(left, right, len) as isize };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reading memory at ALLOC[0x0..0x10], but memory is uninitialized at [0x4..0x10], and this operation requires initialized memory
|
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information

4
src/tools/miri/tests/fail/uninit/uninit_alloc_diagnostic_with_provenance.stderr
View File

@ -1,8 +1,8 @@
error: Undefined Behavior: reading memory at ALLOC[0x0..0x8], but memory is uninitialized at [0x4..0x8], and this operation requires initialized memory
--> RUSTLIB/core/src/slice/cmp.rs:LL:CC
|
LL | let mut order = unsafe { compare_bytes(left.as_ptr(), right.as_ptr(), len) as isize };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reading memory at ALLOC[0x0..0x8], but memory is uninitialized at [0x4..0x8], and this operation requires initialized memory
LL | let mut order = unsafe { compare_bytes(left, right, len) as isize };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reading memory at ALLOC[0x0..0x8], but memory is uninitialized at [0x4..0x8], and this operation requires initialized memory
|
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information

4
src/tools/rust-analyzer/crates/hir-def/src/attr.rs
View File

@ -117,7 +117,7 @@ impl Attrs {
}
impl Attrs {
pub fn by_key<'attrs>(&'attrs self, key: &'attrs Symbol) -> AttrQuery<'_> {
pub fn by_key<'attrs>(&'attrs self, key: &'attrs Symbol) -> AttrQuery<'attrs> {
AttrQuery { attrs: self, key }
}
@ -594,7 +594,7 @@ impl<'attr> AttrQuery<'attr> {
/// #[doc(html_root_url = "url")]
/// ^^^^^^^^^^^^^ key
/// ```
pub fn find_string_value_in_tt(self, key: &'attr Symbol) -> Option<&str> {
pub fn find_string_value_in_tt(self, key: &'attr Symbol) -> Option<&'attr str> {
self.tt_values().find_map(|tt| {
let name = tt.token_trees.iter()
.skip_while(|tt| !matches!(tt, tt::TokenTree::Leaf(tt::Leaf::Ident(tt::Ident { sym, ..} )) if *sym == *key))

2
src/tools/rust-analyzer/crates/hir-def/src/body.rs
View File

@ -197,7 +197,7 @@ impl Body {
pub fn blocks<'a>(
&'a self,
db: &'a dyn DefDatabase,
) -> impl Iterator<Item = (BlockId, Arc<DefMap>)> + '_ {
) -> impl Iterator<Item = (BlockId, Arc<DefMap>)> + 'a {
self.block_scopes.iter().map(move |&block| (block, db.block_def_map(block)))
}

8
tests/crashes/117460.rs Normal file
View File

@ -0,0 +1,8 @@
//@ known-bug: #117460
#![feature(generic_const_exprs)]
struct Matrix<D = [(); 2 + 2]> {
d: D,
}
impl Matrix {}

48
tests/crashes/119095.rs Normal file
View File

@ -0,0 +1,48 @@
//@ known-bug: #119095
//@ compile-flags: --edition=2021
fn any<T>() -> T {
loop {}
}
trait Acquire {
type Connection;
}
impl Acquire for &'static () {
type Connection = ();
}
trait Unit {}
impl Unit for () {}
fn get_connection<T>() -> impl Unit
where
T: Acquire,
T::Connection: Unit,
{
any::<T::Connection>()
}
fn main() {
let future = async { async { get_connection::<&'static ()>() }.await };
future.resolve_me();
}
trait ResolveMe {
fn resolve_me(self);
}
impl<S> ResolveMe for S
where
(): CheckSend<S>,
{
fn resolve_me(self) {}
}
trait CheckSend<F> {}
impl<F> CheckSend<F> for () where F: Send {}
trait NeverImplemented {}
impl<E, F> CheckSend<F> for E where E: NeverImplemented {}

15
tests/crashes/126443.rs Normal file
View File

@ -0,0 +1,15 @@
//@ known-bug: #126443
//@ compile-flags: -Copt-level=0
#![feature(generic_const_exprs)]
fn double_up<const M: usize>() -> [(); M * 2] {
todo!()
}
fn quadruple_up<const N: usize>() -> [(); N * 2 * 2] {
double_up()
}
fn main() {
quadruple_up::<0>();
}

6
tests/crashes/128097.rs Normal file
View File

@ -0,0 +1,6 @@
//@ known-bug: #128097
#![feature(explicit_tail_calls)]
fn f(x: &mut ()) {
let _y: String;
become f(x);
}

39
tests/debuginfo/option-like-enum.rs
View File

@ -8,22 +8,22 @@
// gdb-command:run
// gdb-command:print some
// gdb-check:$1 = core::option::Option<&u32>::Some(0x12345678)
// gdb-check:$1 = core::option::Option<&u32>::Some(0x[...])
// gdb-command:print none
// gdb-check:$2 = core::option::Option<&u32>::None
// gdb-command:print full
// gdb-check:$3 = option_like_enum::MoreFields::Full(454545, 0x87654321, 9988)
// gdb-check:$3 = option_like_enum::MoreFields::Full(454545, 0x[...], 9988)
// gdb-command:print empty_gdb.discr
// gdb-check:$4 = (*mut isize) 0x1
// gdb-command:print empty
// gdb-check:$4 = option_like_enum::MoreFields::Empty
// gdb-command:print droid
// gdb-check:$5 = option_like_enum::NamedFields::Droid{id: 675675, range: 10000001, internals: 0x43218765}
// gdb-check:$5 = option_like_enum::NamedFields::Droid{id: 675675, range: 10000001, internals: 0x[...]}
// gdb-command:print void_droid_gdb.internals
// gdb-check:$6 = (*mut isize) 0x1
// gdb-command:print void_droid
// gdb-check:$6 = option_like_enum::NamedFields::Void
// gdb-command:print nested_non_zero_yep
// gdb-check:$7 = option_like_enum::NestedNonZero::Yep(10.5, option_like_enum::NestedNonZeroField {a: 10, b: 20, c: 0x[...]})
@ -39,19 +39,19 @@
// lldb-command:run
// lldb-command:v some
// lldb-check:[...] Some(&0x12345678)
// lldb-check:[...] Some(&0x[...])
// lldb-command:v none
// lldb-check:[...] None
// lldb-command:v full
// lldb-check:[...] Full(454545, &0x87654321, 9988)
// lldb-check:[...] Full(454545, &0x[...], 9988)
// lldb-command:v empty
// lldb-check:[...] Empty
// lldb-command:v droid
// lldb-check:[...] Droid { id: 675675, range: 10000001, internals: &0x43218765 }
// lldb-check:[...] Droid { id: 675675, range: 10000001, internals: &0x[...] }
// lldb-command:v void_droid
// lldb-check:[...] Void
@ -76,11 +76,6 @@
// contains a non-nullable pointer, then this value is used as the discriminator.
// The test cases in this file make sure that something readable is generated for
// this kind of types.
// If the non-empty variant contains a single non-nullable pointer than the whole
// item is represented as just a pointer and not wrapped in a struct.
// Unfortunately (for these test cases) the content of the non-discriminant fields
// in the null-case is not defined. So we just read the discriminator field in
// this case (by casting the value to a memory-equivalent struct).
enum MoreFields<'a> {
Full(u32, &'a isize, i16),
@ -120,32 +115,26 @@ fn main() {
let some_str: Option<&'static str> = Some("abc");
let none_str: Option<&'static str> = None;
let some: Option<&u32> = Some(unsafe { std::mem::transmute(0x12345678_usize) });
let some: Option<&u32> = Some(&1234);
let none: Option<&u32> = None;
let full = MoreFields::Full(454545, unsafe { std::mem::transmute(0x87654321_usize) }, 9988);
let full = MoreFields::Full(454545, &1234, 9988);
let empty = MoreFields::Empty;
let empty_gdb: &MoreFieldsRepr = unsafe { std::mem::transmute(&MoreFields::Empty) };
let droid = NamedFields::Droid {
id: 675675,
range: 10000001,
internals: unsafe { std::mem::transmute(0x43218765_usize) }
internals: &1234,
};
let void_droid = NamedFields::Void;
let void_droid_gdb: &NamedFieldsRepr = unsafe { std::mem::transmute(&NamedFields::Void) };
let x = 'x';
let nested_non_zero_yep = NestedNonZero::Yep(
10.5,
NestedNonZeroField {
a: 10,
b: 20,
c: &x
c: &'x',
});
let nested_non_zero_nope = NestedNonZero::Nope;
zzz(); // #break

8
tests/mir-opt/building/async_await.b-{closure#0}.coroutine_resume.0.mir
View File

@ -3,14 +3,14 @@
field_tys: {
_0: CoroutineSavedTy {
ty: Coroutine(
DefId(0:4 ~ async_await[ccf8]::a::{closure#0}),
DefId(0:5 ~ async_await[ccf8]::a::{closure#0}),
[
(),
std::future::ResumeTy,
(),
(),
CoroutineWitness(
DefId(0:4 ~ async_await[ccf8]::a::{closure#0}),
DefId(0:5 ~ async_await[ccf8]::a::{closure#0}),
[],
),
(),
@ -24,14 +24,14 @@
},
_1: CoroutineSavedTy {
ty: Coroutine(
DefId(0:4 ~ async_await[ccf8]::a::{closure#0}),
DefId(0:5 ~ async_await[ccf8]::a::{closure#0}),
[
(),
std::future::ResumeTy,
(),
(),
CoroutineWitness(
DefId(0:4 ~ async_await[ccf8]::a::{closure#0}),
DefId(0:5 ~ async_await[ccf8]::a::{closure#0}),
[],
),
(),

2
tests/ui/async-await/issues/issue-63388-1.rs
View File

@ -9,7 +9,7 @@ trait Foo {}
impl Xyz {
async fn do_sth<'a>(
&'a self, foo: &dyn Foo
) -> &dyn Foo
) -> &dyn Foo //~ WARNING elided lifetime has a name
{
//~^ ERROR explicit lifetime required in the type of `foo` [E0621]
foo

13
tests/ui/async-await/issues/issue-63388-1.stderr
View File

@ -1,3 +1,14 @@
warning: elided lifetime has a name
--> $DIR/issue-63388-1.rs:12:10
|
LL | async fn do_sth<'a>(
| -- lifetime `'a` declared here
LL | &'a self, foo: &dyn Foo
LL | ) -> &dyn Foo
| ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0621]: explicit lifetime required in the type of `foo`
--> $DIR/issue-63388-1.rs:13:5
|
@ -10,6 +21,6 @@ LL | | foo
LL | | }
| |_____^ lifetime `'a` required
error: aborting due to 1 previous error
error: aborting due to 1 previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0621`.

10
tests/ui/const-generics/type-dependent/issue-71348.full.stderr Normal file
View File

@ -0,0 +1,10 @@
warning: elided lifetime has a name
--> $DIR/issue-71348.rs:18:68
|
LL | fn ask<'a, const N: &'static str>(&'a self) -> &'a <Self as Get<N>>::Target
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: 1 warning emitted

10
tests/ui/const-generics/type-dependent/issue-71348.min.stderr
View File

@ -1,3 +1,11 @@
warning: elided lifetime has a name
--> $DIR/issue-71348.rs:18:68
|
LL | fn ask<'a, const N: &'static str>(&'a self) -> &'a <Self as Get<N>>::Target
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error: `&'static str` is forbidden as the type of a const generic parameter
--> $DIR/issue-71348.rs:10:24
|
@ -30,5 +38,5 @@ help: add `#![feature(unsized_const_params)]` to the crate attributes to enable
LL + #![feature(unsized_const_params)]
|
error: aborting due to 2 previous errors
error: aborting due to 2 previous errors; 1 warning emitted

1
tests/ui/const-generics/type-dependent/issue-71348.rs
View File

@ -17,6 +17,7 @@ trait Get<'a, const N: &'static str> {
impl Foo {
fn ask<'a, const N: &'static str>(&'a self) -> &'a <Self as Get<N>>::Target
//[min]~^ ERROR `&'static str` is forbidden as the type of a const generic parameter
//~^^ WARNING elided lifetime has a name
where
Self: Get<'a, N>,
{

4
tests/ui/consts/min_const_fn/min_const_fn.rs
View File

@ -44,8 +44,8 @@ impl<T> Foo<T> {
impl<'a, T> Foo<T> {
const fn new_lt(t: T) -> Self { Foo(t) }
const fn into_inner_lt(self) -> T { self.0 } //~ destructor of
const fn get_lt(&'a self) -> &T { &self.0 }
const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
const fn get_lt(&'a self) -> &T { &self.0 } //~ WARNING elided lifetime has a name
const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 } //~ WARNING elided lifetime has a name
//~^ mutable references
//~| mutable references
//~| mutable references

22
tests/ui/consts/min_const_fn/min_const_fn.stderr
View File

@ -1,3 +1,23 @@
warning: elided lifetime has a name
--> $DIR/min_const_fn.rs:47:34
|
LL | impl<'a, T> Foo<T> {
| -- lifetime `'a` declared here
...
LL | const fn get_lt(&'a self) -> &T { &self.0 }
| ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: elided lifetime has a name
--> $DIR/min_const_fn.rs:48:42
|
LL | impl<'a, T> Foo<T> {
| -- lifetime `'a` declared here
...
LL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
| ^ this elided lifetime gets resolved as `'a`
error[E0493]: destructor of `Foo<T>` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:37:25
|
@ -228,7 +248,7 @@ LL | const fn no_apit(_x: impl std::fmt::Debug) {}
| |
| the destructor for this type cannot be evaluated in constant functions
error: aborting due to 24 previous errors
error: aborting due to 24 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0493, E0658.
For more information about an error, try `rustc --explain E0493`.

6
tests/ui/coroutine/print/coroutine-print-verbose-1.stderr
View File

@ -10,7 +10,7 @@ note: coroutine is not `Send` as this value is used across a yield
--> $DIR/coroutine-print-verbose-1.rs:35:9
|
LL | let _non_send_gen = make_non_send_coroutine();
| ------------- has type `Opaque(DefId(0:34 ~ coroutine_print_verbose_1[75fb]::make_non_send_coroutine::{opaque#0}), [])` which is not `Send`
| ------------- has type `Opaque(DefId(0:24 ~ coroutine_print_verbose_1[75fb]::make_non_send_coroutine::{opaque#0}), [])` which is not `Send`
LL | yield;
| ^^^^^ yield occurs here, with `_non_send_gen` maybe used later
note: required by a bound in `require_send`
@ -33,12 +33,12 @@ note: required because it's used within this coroutine
|
LL | #[coroutine] || {
| ^^
note: required because it appears within the type `Opaque(DefId(0:35 ~ coroutine_print_verbose_1[75fb]::make_gen2::{opaque#0}), [Arc<RefCell<i32>>])`
note: required because it appears within the type `Opaque(DefId(0:29 ~ coroutine_print_verbose_1[75fb]::make_gen2::{opaque#0}), [Arc<RefCell<i32>>])`
--> $DIR/coroutine-print-verbose-1.rs:41:30
|
LL | pub fn make_gen2<T>(t: T) -> impl Coroutine<Return = T> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
note: required because it appears within the type `Opaque(DefId(0:36 ~ coroutine_print_verbose_1[75fb]::make_non_send_coroutine2::{opaque#0}), [])`
note: required because it appears within the type `Opaque(DefId(0:32 ~ coroutine_print_verbose_1[75fb]::make_non_send_coroutine2::{opaque#0}), [])`
--> $DIR/coroutine-print-verbose-1.rs:47:34
|
LL | fn make_non_send_coroutine2() -> impl Coroutine<Return = Arc<RefCell<i32>>> {

2
tests/ui/generics/generic-no-mangle.fixed
View File

@ -1,5 +1,5 @@
//@ run-rustfix
#![allow(dead_code)]
#![allow(dead_code, elided_named_lifetimes)]
#![deny(no_mangle_generic_items)]
pub fn foo<T>() {} //~ ERROR functions generic over types or consts must be mangled

2
tests/ui/generics/generic-no-mangle.rs
View File

@ -1,5 +1,5 @@
//@ run-rustfix
#![allow(dead_code)]
#![allow(dead_code, elided_named_lifetimes)]
#![deny(no_mangle_generic_items)]
#[no_mangle]

1
tests/ui/impl-trait/impl-fn-hrtb-bounds.rs
View File

@ -13,6 +13,7 @@ fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
//~^ ERROR `impl Trait` cannot capture higher-ranked lifetime from outer `impl Trait`
//~| WARNING elided lifetime has a name
|x| x
}

12
tests/ui/impl-trait/impl-fn-hrtb-bounds.stderr
View File

@ -1,5 +1,5 @@
error[E0106]: missing lifetime specifier
--> $DIR/impl-fn-hrtb-bounds.rs:19:38
--> $DIR/impl-fn-hrtb-bounds.rs:20:38
|
LL | fn d() -> impl Fn() -> (impl Debug + '_) {
| ^^ expected named lifetime parameter
@ -10,6 +10,14 @@ help: consider using the `'static` lifetime, but this is uncommon unless you're
LL | fn d() -> impl Fn() -> (impl Debug + 'static) {
| ~~~~~~~
warning: elided lifetime has a name
--> $DIR/impl-fn-hrtb-bounds.rs:14:52
|
LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
| -- lifetime `'a` declared here ^^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0657]: `impl Trait` cannot capture higher-ranked lifetime from outer `impl Trait`
--> $DIR/impl-fn-hrtb-bounds.rs:4:41
|
@ -46,7 +54,7 @@ note: lifetime declared here
LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
| ^^
error: aborting due to 4 previous errors
error: aborting due to 4 previous errors; 1 warning emitted
Some errors have detailed explanations: E0106, E0657.
For more information about an error, try `rustc --explain E0106`.

1
tests/ui/impl-trait/impl-fn-predefined-lifetimes.rs
View File

@ -3,6 +3,7 @@ use std::fmt::Debug;
fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) {
//~^ ERROR cannot resolve opaque type
//~| WARNING elided lifetime has a name
|x| x
//~^ ERROR expected generic lifetime parameter, found `'_`
}

14
tests/ui/impl-trait/impl-fn-predefined-lifetimes.stderr
View File

@ -1,9 +1,17 @@
warning: elided lifetime has a name
--> $DIR/impl-fn-predefined-lifetimes.rs:4:48
|
LL | fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) {
| -- lifetime `'a` declared here ^^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0792]: expected generic lifetime parameter, found `'_`
--> $DIR/impl-fn-predefined-lifetimes.rs:6:9
--> $DIR/impl-fn-predefined-lifetimes.rs:7:9
|
LL | fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) {
| -- this generic parameter must be used with a generic lifetime parameter
LL |
...
LL | |x| x
| ^
@ -13,7 +21,7 @@ error[E0720]: cannot resolve opaque type
LL | fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) {
| ^^^^^^^^^^^^^^^ cannot resolve opaque type
error: aborting due to 2 previous errors
error: aborting due to 2 previous errors; 1 warning emitted
Some errors have detailed explanations: E0720, E0792.
For more information about an error, try `rustc --explain E0720`.

1
tests/ui/impl-trait/rpit-assoc-pair-with-lifetime.rs
View File

@ -1,6 +1,7 @@
//@ check-pass
pub fn iter<'a>(v: Vec<(u32, &'a u32)>) -> impl DoubleEndedIterator<Item = (u32, &u32)> {
//~^ WARNING elided lifetime has a name
v.into_iter()
}

10
tests/ui/impl-trait/rpit-assoc-pair-with-lifetime.stderr Normal file
View File

@ -0,0 +1,10 @@
warning: elided lifetime has a name
--> $DIR/rpit-assoc-pair-with-lifetime.rs:3:82
|
LL | pub fn iter<'a>(v: Vec<(u32, &'a u32)>) -> impl DoubleEndedIterator<Item = (u32, &u32)> {
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: 1 warning emitted

1
tests/ui/lifetimes/lifetime-elision-return-type-requires-explicit-lifetime.rs
View File

@ -47,5 +47,6 @@ fn l<'a>(_: &'a str, _: &'a str) -> &str { "" }
// This is ok because both `'a` are for the same parameter.
fn m<'a>(_: &'a Foo<'a>) -> &str { "" }
//~^ WARNING elided lifetime has a name
fn main() {}

12
tests/ui/lifetimes/lifetime-elision-return-type-requires-explicit-lifetime.stderr
View File

@ -105,6 +105,16 @@ help: consider using the `'a` lifetime
LL | fn l<'a>(_: &'a str, _: &'a str) -> &'a str { "" }
| ++
error: aborting due to 7 previous errors
warning: elided lifetime has a name
--> $DIR/lifetime-elision-return-type-requires-explicit-lifetime.rs:49:29
|
LL | fn m<'a>(_: &'a Foo<'a>) -> &str { "" }
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error: aborting due to 7 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0106`.

1
tests/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl-3.rs
View File

@ -4,6 +4,7 @@ struct Foo {
impl Foo {
fn foo<'a>(&'a self, x: &i32) -> &i32 {
//~^ WARNING elided lifetime has a name
if true { &self.field } else { x } //~ ERROR explicit lifetime

16
tests/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl-3.stderr
View File

@ -1,12 +1,22 @@
warning: elided lifetime has a name
--> $DIR/ex1-return-one-existing-name-if-else-using-impl-3.rs:6:36
|
LL | fn foo<'a>(&'a self, x: &i32) -> &i32 {
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0621]: explicit lifetime required in the type of `x`
--> $DIR/ex1-return-one-existing-name-if-else-using-impl-3.rs:8:36
--> $DIR/ex1-return-one-existing-name-if-else-using-impl-3.rs:9:36
|
LL | fn foo<'a>(&'a self, x: &i32) -> &i32 {
| ---- help: add explicit lifetime `'a` to the type of `x`: `&'a i32`
LL |
...
LL | if true { &self.field } else { x }
| ^ lifetime `'a` required
error: aborting due to 1 previous error
error: aborting due to 1 previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0621`.

12
tests/ui/lint/elided-named-lifetimes/example-from-issue48686.rs Normal file
View File

@ -0,0 +1,12 @@
#![deny(elided_named_lifetimes)]
struct Foo;
impl Foo {
pub fn get_mut(&'static self, x: &mut u8) -> &mut u8 {
//~^ ERROR elided lifetime has a name
unsafe { &mut *(x as *mut _) }
}
}
fn main() {}

14
tests/ui/lint/elided-named-lifetimes/example-from-issue48686.stderr Normal file
View File

@ -0,0 +1,14 @@
error: elided lifetime has a name
--> $DIR/example-from-issue48686.rs:6:50
|
LL | pub fn get_mut(&'static self, x: &mut u8) -> &mut u8 {
| ^ this elided lifetime gets resolved as `'static`
|
note: the lint level is defined here
--> $DIR/example-from-issue48686.rs:1:9
|
LL | #![deny(elided_named_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error

27
tests/ui/lint/elided-named-lifetimes/missing-lifetime-kind.rs Normal file
View File

@ -0,0 +1,27 @@
#![deny(elided_named_lifetimes)]
fn ampersand<'a>(x: &'a u8) -> &u8 {
//~^ ERROR elided lifetime has a name
x
}
struct Brackets<'a>(&'a u8);
fn brackets<'a>(x: &'a u8) -> Brackets {
//~^ ERROR elided lifetime has a name
Brackets(x)
}
struct Comma<'a, T>(&'a T);
fn comma<'a>(x: &'a u8) -> Comma<u8> {
//~^ ERROR elided lifetime has a name
Comma(x)
}
fn underscore<'a>(x: &'a u8) -> &'_ u8 {
//~^ ERROR elided lifetime has a name
x
}
fn main() {}

40
tests/ui/lint/elided-named-lifetimes/missing-lifetime-kind.stderr Normal file
View File

@ -0,0 +1,40 @@
error: elided lifetime has a name
--> $DIR/missing-lifetime-kind.rs:3:32
|
LL | fn ampersand<'a>(x: &'a u8) -> &u8 {
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
note: the lint level is defined here
--> $DIR/missing-lifetime-kind.rs:1:9
|
LL | #![deny(elided_named_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^^^
error: elided lifetime has a name
--> $DIR/missing-lifetime-kind.rs:10:31
|
LL | fn brackets<'a>(x: &'a u8) -> Brackets {
| -- ^^^^^^^^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
error: elided lifetime has a name
--> $DIR/missing-lifetime-kind.rs:17:33
|
LL | fn comma<'a>(x: &'a u8) -> Comma<u8> {
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
error: elided lifetime has a name
--> $DIR/missing-lifetime-kind.rs:22:34
|
LL | fn underscore<'a>(x: &'a u8) -> &'_ u8 {
| -- ^^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
error: aborting due to 4 previous errors

17
tests/ui/lint/elided-named-lifetimes/not-tied-to-crate.rs Normal file
View File

@ -0,0 +1,17 @@
#![allow(elided_named_lifetimes)]
#[warn(elided_named_lifetimes)]
mod foo {
fn bar(x: &'static u8) -> &u8 {
//~^ WARNING elided lifetime has a name
x
}
#[deny(elided_named_lifetimes)]
fn baz(x: &'static u8) -> &u8 {
//~^ ERROR elided lifetime has a name
x
}
}
fn main() {}

26
tests/ui/lint/elided-named-lifetimes/not-tied-to-crate.stderr Normal file
View File

@ -0,0 +1,26 @@
warning: elided lifetime has a name
--> $DIR/not-tied-to-crate.rs:5:31
|
LL | fn bar(x: &'static u8) -> &u8 {
| ^ this elided lifetime gets resolved as `'static`
|
note: the lint level is defined here
--> $DIR/not-tied-to-crate.rs:3:8
|
LL | #[warn(elided_named_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^^^
error: elided lifetime has a name
--> $DIR/not-tied-to-crate.rs:11:31
|
LL | fn baz(x: &'static u8) -> &u8 {
| ^ this elided lifetime gets resolved as `'static`
|
note: the lint level is defined here
--> $DIR/not-tied-to-crate.rs:10:12
|
LL | #[deny(elided_named_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error; 1 warning emitted

46
tests/ui/lint/elided-named-lifetimes/static.rs Normal file
View File

@ -0,0 +1,46 @@
#![deny(elided_named_lifetimes)]
use std::borrow::Cow;
const A: &[u8] = &[];
static B: &str = "hello";
trait Trait {
const C: &u8 = &0;
}
impl Trait for () {
const C: &u8 = &1;
}
fn ampersand(x: &'static u8) -> &u8 {
//~^ ERROR elided lifetime has a name
x
}
struct Brackets<'a>(&'a u8);
fn brackets(x: &'static u8) -> Brackets {
//~^ ERROR elided lifetime has a name
Brackets(x)
}
struct Comma<'a, T>(&'a T);
fn comma(x: &'static u8) -> Comma<u8> {
//~^ ERROR elided lifetime has a name
Comma(x)
}
fn underscore(x: &'static u8) -> &'_ u8 {
//~^ ERROR elided lifetime has a name
x
}
const NESTED: &Vec<&Box<Cow<str>>> = &vec![];
fn main() {
const HELLO: &str = "Hello";
static WORLD: &str = "world";
println!("{HELLO}, {WORLD}!")
}

32
tests/ui/lint/elided-named-lifetimes/static.stderr Normal file
View File

@ -0,0 +1,32 @@
error: elided lifetime has a name
--> $DIR/static.rs:16:33
|
LL | fn ampersand(x: &'static u8) -> &u8 {
| ^ this elided lifetime gets resolved as `'static`
|
note: the lint level is defined here
--> $DIR/static.rs:1:9
|
LL | #![deny(elided_named_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^^^
error: elided lifetime has a name
--> $DIR/static.rs:23:32
|
LL | fn brackets(x: &'static u8) -> Brackets {
| ^^^^^^^^ this elided lifetime gets resolved as `'static`
error: elided lifetime has a name
--> $DIR/static.rs:30:34
|
LL | fn comma(x: &'static u8) -> Comma<u8> {
| ^ this elided lifetime gets resolved as `'static`
error: elided lifetime has a name
--> $DIR/static.rs:35:35
|
LL | fn underscore(x: &'static u8) -> &'_ u8 {
| ^^ this elided lifetime gets resolved as `'static`
error: aborting due to 4 previous errors

8
tests/ui/nll/ty-outlives/impl-trait-captures.stderr
View File

@ -1,16 +1,16 @@
error[E0700]: hidden type for `Opaque(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), ['a/#0, T, 'a/#0])` captures lifetime that does not appear in bounds
error[E0700]: hidden type for `Opaque(DefId(0:11 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), ['a/#0, T, 'a/#0])` captures lifetime that does not appear in bounds
--> $DIR/impl-trait-captures.rs:11:5
|
LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> {
| -- ------------ opaque type defined here
| |
| hidden type `&ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_)) T` captures the anonymous lifetime defined here
| hidden type `&ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_)) T` captures the anonymous lifetime defined here
LL | x
| ^
|
help: add a `use<...>` bound to explicitly capture `ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_))`
help: add a `use<...>` bound to explicitly capture `ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_))`
|
LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> + use<'a, ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_)), T> {
LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> + use<'a, ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_)), T> {
| +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
error: aborting due to 1 previous error

2
tests/ui/object-lifetime/object-lifetime-default-elision.rs
View File

@ -46,6 +46,8 @@ fn load1(ss: &dyn SomeTrait) -> &dyn SomeTrait {
}
fn load2<'a>(ss: &'a dyn SomeTrait) -> &dyn SomeTrait {
//~^ WARNING elided lifetime has a name
// Same as `load1` but with an explicit name thrown in for fun.
ss

14
tests/ui/object-lifetime/object-lifetime-default-elision.stderr
View File

@ -1,5 +1,15 @@
warning: elided lifetime has a name
--> $DIR/object-lifetime-default-elision.rs:48:40
|
LL | fn load2<'a>(ss: &'a dyn SomeTrait) -> &dyn SomeTrait {
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error: lifetime may not live long enough
--> $DIR/object-lifetime-default-elision.rs:71:5
--> $DIR/object-lifetime-default-elision.rs:73:5
|
LL | fn load3<'a,'b>(ss: &'a dyn SomeTrait) -> &'b dyn SomeTrait {
| -- -- lifetime `'b` defined here
@ -11,5 +21,5 @@ LL | ss
|
= help: consider adding the following bound: `'a: 'b`
error: aborting due to 1 previous error
error: aborting due to 1 previous error; 1 warning emitted

2
tests/ui/self/elision/ignore-non-reference-lifetimes.rs
View File

@ -4,9 +4,11 @@ struct Foo<'a>(&'a str);
impl<'b> Foo<'b> {
fn a<'a>(self: Self, a: &'a str) -> &str {
//~^ WARNING elided lifetime has a name
a
}
fn b<'a>(self: Foo<'b>, a: &'a str) -> &str {
//~^ WARNING elided lifetime has a name
a
}
}

16
tests/ui/self/elision/ignore-non-reference-lifetimes.stderr Normal file
View File

@ -0,0 +1,16 @@
warning: elided lifetime has a name
--> $DIR/ignore-non-reference-lifetimes.rs:6:41
|
LL | fn a<'a>(self: Self, a: &'a str) -> &str {
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: elided lifetime has a name
--> $DIR/ignore-non-reference-lifetimes.rs:10:44
|
LL | fn b<'a>(self: Foo<'b>, a: &'a str) -> &str {
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
warning: 2 warnings emitted

2
tests/ui/self/elision/lt-ref-self-async.fixed
View File

@ -1,6 +1,6 @@
//@ edition:2018
//@ run-rustfix
#![allow(non_snake_case, dead_code)]
#![allow(non_snake_case, dead_code, elided_named_lifetimes)]
use std::pin::Pin;

2
tests/ui/self/elision/lt-ref-self-async.rs
View File

@ -1,6 +1,6 @@
//@ edition:2018
//@ run-rustfix
#![allow(non_snake_case, dead_code)]
#![allow(non_snake_case, dead_code, elided_named_lifetimes)]
use std::pin::Pin;

2
tests/ui/self/self_lifetime-async.rs
View File

@ -4,11 +4,13 @@
struct Foo<'a>(&'a ());
impl<'a> Foo<'a> {
async fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 }
//~^ WARNING elided lifetime has a name
}
type Alias = Foo<'static>;
impl Alias {
async fn bar<'a>(self: &Alias, arg: &'a ()) -> &() { arg }
//~^ WARNING elided lifetime has a name
}
fn main() {}

18
tests/ui/self/self_lifetime-async.stderr Normal file
View File

@ -0,0 +1,18 @@
warning: elided lifetime has a name
--> $DIR/self_lifetime-async.rs:6:44
|
LL | async fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 }
| -- ^ this elided lifetime gets resolved as `'b`
| |
| lifetime `'b` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: elided lifetime has a name
--> $DIR/self_lifetime-async.rs:12:52
|
LL | async fn bar<'a>(self: &Alias, arg: &'a ()) -> &() { arg }
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
warning: 2 warnings emitted

2
tests/ui/self/self_lifetime.rs
View File

@ -5,11 +5,13 @@
struct Foo<'a>(&'a ());
impl<'a> Foo<'a> {
fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 }
//~^ WARNING elided lifetime has a name
}
type Alias = Foo<'static>;
impl Alias {
fn bar<'a>(self: &Alias, arg: &'a ()) -> &() { arg }
//~^ WARNING elided lifetime has a name
}
fn main() {}

18
tests/ui/self/self_lifetime.stderr Normal file
View File

@ -0,0 +1,18 @@
warning: elided lifetime has a name
--> $DIR/self_lifetime.rs:7:38
|
LL | fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 }
| -- ^ this elided lifetime gets resolved as `'b`
| |
| lifetime `'b` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: elided lifetime has a name
--> $DIR/self_lifetime.rs:13:46
|
LL | fn bar<'a>(self: &Alias, arg: &'a ()) -> &() { arg }
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
warning: 2 warnings emitted

1
tests/ui/suggestions/impl-trait-missing-lifetime-gated.rs
View File

@ -64,6 +64,7 @@ mod in_path {
// This must not err, as the `&` actually resolves to `'a`.
fn resolved_anonymous<'a, T: 'a>(f: impl Fn(&'a str) -> &T) {
//~^ WARNING elided lifetime has a name
f("f");
}

10
tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr
View File

@ -124,6 +124,14 @@ LL - fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
LL + fn g(mut x: impl Foo<()>) -> Option<()> { x.next() }
|
warning: elided lifetime has a name
--> $DIR/impl-trait-missing-lifetime-gated.rs:66:57
|
LL | fn resolved_anonymous<'a, T: 'a>(f: impl Fn(&'a str) -> &T) {
| -- lifetime `'a` declared here ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0658]: anonymous lifetimes in `impl Trait` are unstable
--> $DIR/impl-trait-missing-lifetime-gated.rs:6:35
|
@ -244,7 +252,7 @@ help: consider introducing a named lifetime parameter
LL | fn g<'a>(mut x: impl Foo<'a, ()>) -> Option<&()> { x.next() }
| ++++ +++
error: aborting due to 16 previous errors
error: aborting due to 16 previous errors; 1 warning emitted
Some errors have detailed explanations: E0106, E0658.
For more information about an error, try `rustc --explain E0106`.

1
tests/ui/suggestions/lifetimes/missing-lifetimes-in-signature.rs
View File

@ -100,6 +100,7 @@ where
// This also works. The `'_` isn't necessary but it's where we arrive to following the suggestions:
fn ok2<'a, G: 'a, T>(g: G, dest: &'a mut T) -> impl FnOnce() + '_ + 'a
//~^ WARNING elided lifetime has a name
where
G: Get<T>,
{

10
tests/ui/suggestions/lifetimes/missing-lifetimes-in-signature.stderr
View File

@ -6,6 +6,14 @@ LL | fn baz<G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| |
| help: consider introducing lifetime `'a` here: `'a,`
warning: elided lifetime has a name
--> $DIR/missing-lifetimes-in-signature.rs:102:64
|
LL | fn ok2<'a, G: 'a, T>(g: G, dest: &'a mut T) -> impl FnOnce() + '_ + 'a
| -- lifetime `'a` declared here ^^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0700]: hidden type for `impl FnOnce()` captures lifetime that does not appear in bounds
--> $DIR/missing-lifetimes-in-signature.rs:19:5
|
@ -125,7 +133,7 @@ help: consider adding an explicit lifetime bound
LL | G: Get<T> + 'a,
| ++++
error: aborting due to 8 previous errors
error: aborting due to 8 previous errors; 1 warning emitted
Some errors have detailed explanations: E0261, E0309, E0311, E0621, E0700.
For more information about an error, try `rustc --explain E0261`.

2
tests/ui/type-alias-impl-trait/missing_lifetime_bound.rs
View File

@ -2,7 +2,7 @@
type Opaque2<T> = impl Sized;
type Opaque<'a, T> = Opaque2<T>;
fn defining<'a, T>(x: &'a i32) -> Opaque<T> { x }
fn defining<'a, T>(x: &'a i32) -> Opaque<T> { x } //~ WARNING elided lifetime has a name
//~^ ERROR: hidden type for `Opaque2<T>` captures lifetime that does not appear in bounds
fn main() {}

12
tests/ui/type-alias-impl-trait/missing_lifetime_bound.stderr
View File

@ -1,3 +1,13 @@
warning: elided lifetime has a name
--> $DIR/missing_lifetime_bound.rs:5:41
|
LL | fn defining<'a, T>(x: &'a i32) -> Opaque<T> { x }
| -- ^ this elided lifetime gets resolved as `'a`
| |
| lifetime `'a` declared here
|
= note: `#[warn(elided_named_lifetimes)]` on by default
error[E0700]: hidden type for `Opaque2<T>` captures lifetime that does not appear in bounds
--> $DIR/missing_lifetime_bound.rs:5:47
|
@ -9,6 +19,6 @@ LL | fn defining<'a, T>(x: &'a i32) -> Opaque<T> { x }
| |
| hidden type `&'a i32` captures the lifetime `'a` as defined here
error: aborting due to 1 previous error
error: aborting due to 1 previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0700`.