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Rollup merge of #82370 - 0yoyoyo:update-issue-81650-point-anonymous-lifetime, r=estebank

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Improve anonymous lifetime note to indicate the target span

Improvement for  #81650
Cc #81995

Message after this improvement:
(Improve note in the middle)

```
error[E0311]: the parameter type `T` may not live long enough
  --> src/main.rs:25:11
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |              -- help: consider adding an explicit lifetime bound...: `T: 'a +`
25 |     scope.spawn(move |_| {
   |           ^^^^^
   |
note: the parameter type `T` must be valid for the anonymous lifetime defined on the function body at 24:40...
  --> src/main.rs:24:40
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |                                        ^^^^^
note: ...so that the type `[closure@src/main.rs:25:17: 27:6]` will meet its required lifetime bounds
  --> src/main.rs:25:11
   |
25 |     scope.spawn(move |_| {
   |           ^^^^^
```

r? ``````@estebank``````
This commit is contained in:
Dylan DPC 2021-02-27 02:34:22 +01:00 • committed by GitHub
commit f0c98b15cc
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GPG key ID: 4AEE18F83AFDEB23
20 changed files with 157 additions and 166 deletions
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10
compiler/rustc_infer/src/infer/error_reporting/mod.rs
View file

@ -50,6 +50,7 @@ use super::region_constraints::GenericKind;
use super::{InferCtxt, RegionVariableOrigin, SubregionOrigin, TypeTrace, ValuePairs};
use crate::infer;
use crate::infer::error_reporting::nice_region_error::find_anon_type::find_anon_type;
use crate::traits::error_reporting::report_object_safety_error;
use crate::traits::{
IfExpressionCause, MatchExpressionArmCause, ObligationCause, ObligationCauseCode,
@ -179,7 +180,14 @@ fn msg_span_from_early_bound_and_free_regions(
}
ty::ReFree(ref fr) => match fr.bound_region {
ty::BrAnon(idx) => {
(format!("the anonymous lifetime #{} defined on", idx + 1), tcx.hir().span(node))
if let Some((ty, _)) = find_anon_type(tcx, region, &fr.bound_region) {
("the anonymous lifetime defined on".to_string(), ty.span)
} else {
(
format!("the anonymous lifetime #{} defined on", idx + 1),
tcx.hir().span(node),
)
}
}
_ => (
format!("the lifetime `{}` as defined on", region),

5
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/different_lifetimes.rs
View file

@ -1,6 +1,7 @@
//! Error Reporting for Anonymous Region Lifetime Errors
//! where both the regions are anonymous.
use crate::infer::error_reporting::nice_region_error::find_anon_type::find_anon_type;
use crate::infer::error_reporting::nice_region_error::util::AnonymousParamInfo;
use crate::infer::error_reporting::nice_region_error::NiceRegionError;
use crate::infer::lexical_region_resolve::RegionResolutionError;
@ -66,9 +67,9 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
let scope_def_id_sub = anon_reg_sub.def_id;
let bregion_sub = anon_reg_sub.boundregion;
let ty_sup = self.find_anon_type(sup, &bregion_sup)?;
let ty_sup = find_anon_type(self.tcx(), sup, &bregion_sup)?;
let ty_sub = self.find_anon_type(sub, &bregion_sub)?;
let ty_sub = find_anon_type(self.tcx(), sub, &bregion_sub)?;
debug!(
"try_report_anon_anon_conflict: found_param1={:?} sup={:?} br1={:?}",

30
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/find_anon_type.rs
View file

@ -1,4 +1,3 @@
use crate::infer::error_reporting::nice_region_error::NiceRegionError;
use rustc_hir as hir;
use rustc_hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc_hir::Node;
@ -6,7 +5,6 @@ use rustc_middle::hir::map::Map;
use rustc_middle::middle::resolve_lifetime as rl;
use rustc_middle::ty::{self, Region, TyCtxt};
impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
/// This function calls the `visit_ty` method for the parameters
/// corresponding to the anonymous regions. The `nested_visitor.found_type`
/// contains the anonymous type.
@ -22,29 +20,28 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
/// ```
/// The function returns the nested type corresponding to the anonymous region
/// for e.g., `&u8` and Vec<`&u8`.
pub(super) fn find_anon_type(
&self,
pub(crate) fn find_anon_type(
tcx: TyCtxt<'tcx>,
region: Region<'tcx>,
br: &ty::BoundRegionKind,
) -> Option<(&hir::Ty<'tcx>, &hir::FnDecl<'tcx>)> {
if let Some(anon_reg) = self.tcx().is_suitable_region(region) {
let hir_id = self.tcx().hir().local_def_id_to_hir_id(anon_reg.def_id);
let fndecl = match self.tcx().hir().get(hir_id) {
) -> Option<(&'tcx hir::Ty<'tcx>, &'tcx hir::FnDecl<'tcx>)> {
if let Some(anon_reg) = tcx.is_suitable_region(region) {
let hir_id = tcx.hir().local_def_id_to_hir_id(anon_reg.def_id);
let fndecl = match tcx.hir().get(hir_id) {
Node::Item(&hir::Item { kind: hir::ItemKind::Fn(ref m, ..), .. })
| Node::TraitItem(&hir::TraitItem {
kind: hir::TraitItemKind::Fn(ref m, ..),
..
kind: hir::TraitItemKind::Fn(ref m, ..), ..
})
| Node::ImplItem(&hir::ImplItem {
kind: hir::ImplItemKind::Fn(ref m, ..), ..
}) => &m.decl,
| Node::ImplItem(&hir::ImplItem { kind: hir::ImplItemKind::Fn(ref m, ..), .. }) => {
&m.decl
}
_ => return None,
};
fndecl
.inputs
.iter()
.find_map(|arg| self.find_component_for_bound_region(arg, br))
.find_map(|arg| find_component_for_bound_region(tcx, arg, br))
.map(|ty| (ty, &**fndecl))
} else {
None
@ -54,12 +51,12 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
// This method creates a FindNestedTypeVisitor which returns the type corresponding
// to the anonymous region.
fn find_component_for_bound_region(
&self,
tcx: TyCtxt<'tcx>,
arg: &'tcx hir::Ty<'tcx>,
br: &ty::BoundRegionKind,
) -> Option<&'tcx hir::Ty<'tcx>> {
let mut nested_visitor = FindNestedTypeVisitor {
tcx: self.tcx(),
tcx,
bound_region: *br,
found_type: None,
current_index: ty::INNERMOST,
@ -67,7 +64,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
nested_visitor.visit_ty(arg);
nested_visitor.found_type
}
}
// The FindNestedTypeVisitor captures the corresponding `hir::Ty` of the
// anonymous region. The example above would lead to a conflict between

2
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mod.rs
View file

@ -6,7 +6,7 @@ use rustc_middle::ty::{self, TyCtxt};
use rustc_span::source_map::Span;
mod different_lifetimes;
mod find_anon_type;
pub mod find_anon_type;
mod named_anon_conflict;
mod placeholder_error;
mod static_impl_trait;

3
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/named_anon_conflict.rs
View file

@ -1,5 +1,6 @@
//! Error Reporting for Anonymous Region Lifetime Errors
//! where one region is named and the other is anonymous.
use crate::infer::error_reporting::nice_region_error::find_anon_type::find_anon_type;
use crate::infer::error_reporting::nice_region_error::NiceRegionError;
use rustc_errors::{struct_span_err, Applicability, DiagnosticBuilder};
use rustc_hir::intravisit::Visitor;
@ -74,7 +75,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
return None;
}
if let Some((_, fndecl)) = self.find_anon_type(anon, &br) {
if let Some((_, fndecl)) = find_anon_type(self.tcx(), anon, &br) {
if self.is_self_anon(is_first, scope_def_id) {
return None;
}

6
src/test/ui/issues/issue-16683.stderr
View file

@ -4,11 +4,11 @@ error[E0495]: cannot infer an appropriate lifetime for autoref due to conflictin
LL | self.a();
| ^
|
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 3:5...
--> $DIR/issue-16683.rs:3:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 3:10...
--> $DIR/issue-16683.rs:3:10
|
LL | fn b(&self) {
| ^^^^^^^^^^^
| ^^^^^
note: ...so that reference does not outlive borrowed content
--> $DIR/issue-16683.rs:4:9
|

12
src/test/ui/issues/issue-17740.stderr
View file

@ -6,11 +6,11 @@ LL | fn bar(self: &mut Foo) {
|
= note: expected struct `Foo<'a>`
found struct `Foo<'_>`
note: the anonymous lifetime #2 defined on the method body at 6:5...
--> $DIR/issue-17740.rs:6:5
note: the anonymous lifetime defined on the method body at 6:23...
--> $DIR/issue-17740.rs:6:23
|
LL | fn bar(self: &mut Foo) {
| ^^^^^^^^^^^^^^^^^^^^^^
| ^^^
note: ...does not necessarily outlive the lifetime `'a` as defined on the impl at 5:7
--> $DIR/issue-17740.rs:5:7
|
@ -30,11 +30,11 @@ note: the lifetime `'a` as defined on the impl at 5:7...
|
LL | impl <'a> Foo<'a>{
| ^^
note: ...does not necessarily outlive the anonymous lifetime #2 defined on the method body at 6:5
--> $DIR/issue-17740.rs:6:5
note: ...does not necessarily outlive the anonymous lifetime defined on the method body at 6:23
--> $DIR/issue-17740.rs:6:23
|
LL | fn bar(self: &mut Foo) {
| ^^^^^^^^^^^^^^^^^^^^^^
| ^^^
error: aborting due to 2 previous errors

6
src/test/ui/issues/issue-17758.stderr
View file

@ -4,11 +4,11 @@ error[E0495]: cannot infer an appropriate lifetime for autoref due to conflictin
LL | self.foo();
| ^^^
|
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 6:5...
--> $DIR/issue-17758.rs:6:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 6:12...
--> $DIR/issue-17758.rs:6:12
|
LL | fn bar(&self) {
| ^^^^^^^^^^^^^
| ^^^^^
note: ...so that reference does not outlive borrowed content
--> $DIR/issue-17758.rs:7:9
|

12
src/test/ui/issues/issue-17905-2.stderr
View file

@ -6,11 +6,11 @@ LL | fn say(self: &Pair<&str, isize>) {
|
= note: expected struct `Pair<&str, _>`
found struct `Pair<&str, _>`
note: the anonymous lifetime #2 defined on the method body at 8:5...
--> $DIR/issue-17905-2.rs:8:5
note: the anonymous lifetime defined on the method body at 8:24...
--> $DIR/issue-17905-2.rs:8:24
|
LL | fn say(self: &Pair<&str, isize>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^
note: ...does not necessarily outlive the lifetime `'_` as defined on the impl at 5:5
--> $DIR/issue-17905-2.rs:5:5
|
@ -30,11 +30,11 @@ note: the lifetime `'_` as defined on the impl at 5:5...
|
LL | &str,
| ^
note: ...does not necessarily outlive the anonymous lifetime #2 defined on the method body at 8:5
--> $DIR/issue-17905-2.rs:8:5
note: ...does not necessarily outlive the anonymous lifetime defined on the method body at 8:24
--> $DIR/issue-17905-2.rs:8:24
|
LL | fn say(self: &Pair<&str, isize>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^
error: aborting due to 2 previous errors

6
src/test/ui/issues/issue-20831-debruijn.stderr
View file

@ -4,11 +4,11 @@ error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` d
LL | fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: first, the lifetime cannot outlive the anonymous lifetime #2 defined on the method body at 28:5...
--> $DIR/issue-20831-debruijn.rs:28:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 28:58...
--> $DIR/issue-20831-debruijn.rs:28:58
|
LL | fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...but the lifetime must also be valid for the lifetime `'a` as defined on the impl at 26:6...
--> $DIR/issue-20831-debruijn.rs:26:6
|

12
src/test/ui/issues/issue-27942.stderr
View file

@ -6,11 +6,11 @@ LL | fn select(&self) -> BufferViewHandle<R>;
|
= note: expected type `Resources<'_>`
found type `Resources<'a>`
note: the anonymous lifetime #1 defined on the method body at 5:5...
--> $DIR/issue-27942.rs:5:5
note: the anonymous lifetime defined on the method body at 5:15...
--> $DIR/issue-27942.rs:5:15
|
LL | fn select(&self) -> BufferViewHandle<R>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^
note: ...does not necessarily outlive the lifetime `'a` as defined on the trait at 3:18
--> $DIR/issue-27942.rs:3:18
|
@ -30,11 +30,11 @@ note: the lifetime `'a` as defined on the trait at 3:18...
|
LL | pub trait Buffer<'a, R: Resources<'a>> {
| ^^
note: ...does not necessarily outlive the anonymous lifetime #1 defined on the method body at 5:5
--> $DIR/issue-27942.rs:5:5
note: ...does not necessarily outlive the anonymous lifetime defined on the method body at 5:15
--> $DIR/issue-27942.rs:5:15
|
LL | fn select(&self) -> BufferViewHandle<R>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^
error: aborting due to 2 previous errors

6
src/test/ui/nll/issue-52742.stderr
View file

@ -9,11 +9,11 @@ note: ...the reference is valid for the lifetime `'_` as defined on the impl at
|
LL | impl Foo<'_, '_> {
| ^^
note: ...but the borrowed content is only valid for the anonymous lifetime #2 defined on the method body at 13:5
--> $DIR/issue-52742.rs:13:5
note: ...but the borrowed content is only valid for the anonymous lifetime defined on the method body at 13:31
--> $DIR/issue-52742.rs:13:31
|
LL | fn take_bar(&mut self, b: Bar<'_>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^
error: aborting due to previous error

6
src/test/ui/nll/issue-55394.stderr
View file

@ -4,11 +4,11 @@ error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'s` d
LL | Foo { bar }
| ^^^
|
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 8:5...
--> $DIR/issue-55394.rs:8:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 8:17...
--> $DIR/issue-55394.rs:8:17
|
LL | fn new(bar: &mut Bar) -> Self {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^
note: ...so that reference does not outlive borrowed content
--> $DIR/issue-55394.rs:9:15
|

12
src/test/ui/nll/type-alias-free-regions.stderr
View file

@ -4,11 +4,11 @@ error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` d
LL | C { f: b }
| ^
|
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 16:5...
--> $DIR/type-alias-free-regions.rs:16:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 16:24...
--> $DIR/type-alias-free-regions.rs:16:24
|
LL | fn from_box(b: Box<B>) -> Self {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^
note: ...so that the expression is assignable
--> $DIR/type-alias-free-regions.rs:17:16
|
@ -35,11 +35,11 @@ error[E0495]: cannot infer an appropriate lifetime due to conflicting requiremen
LL | C { f: Box::new(b.0) }
| ^^^^^^^^^^^^^
|
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 26:5...
--> $DIR/type-alias-free-regions.rs:26:5
note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 26:23...
--> $DIR/type-alias-free-regions.rs:26:23
|
LL | fn from_tuple(b: (B,)) -> Self {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^
note: ...so that the expression is assignable
--> $DIR/type-alias-free-regions.rs:27:25
|

6
src/test/ui/regions/regions-infer-paramd-indirect.stderr
View file

@ -6,11 +6,11 @@ LL | self.f = b;
|
= note: expected struct `Box<Box<&'a isize>>`
found struct `Box<Box<&isize>>`
note: the anonymous lifetime #2 defined on the method body at 21:5...
--> $DIR/regions-infer-paramd-indirect.rs:21:5
note: the anonymous lifetime defined on the method body at 21:36...
--> $DIR/regions-infer-paramd-indirect.rs:21:36
|
LL | fn set_f_bad(&mut self, b: Box<B>) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^
note: ...does not necessarily outlive the lifetime `'a` as defined on the impl at 16:6
--> $DIR/regions-infer-paramd-indirect.rs:16:6
|

6
src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature-2.nll.stderr
View file

@ -7,11 +7,11 @@ LL | | t.test();
LL | | });
| |______^
|
note: the parameter type `T` must be valid for the anonymous lifetime #2 defined on the function body at 19:1...
--> $DIR/missing-lifetimes-in-signature-2.rs:19:1
note: the parameter type `T` must be valid for the anonymous lifetime defined on the function body at 19:24...
--> $DIR/missing-lifetimes-in-signature-2.rs:19:24
|
LL | fn func<T: Test>(foo: &Foo, t: T) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^
error: aborting due to previous error

6
src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature-2.stderr
View file

@ -6,11 +6,11 @@ LL | fn func<T: Test>(foo: &Foo, t: T) {
LL | foo.bar(move |_| {
| ^^^
|
note: the parameter type `T` must be valid for the anonymous lifetime #2 defined on the function body at 19:1...
--> $DIR/missing-lifetimes-in-signature-2.rs:19:1
note: the parameter type `T` must be valid for the anonymous lifetime defined on the function body at 19:24...
--> $DIR/missing-lifetimes-in-signature-2.rs:19:24
|
LL | fn func<T: Test>(foo: &Foo, t: T) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^
note: ...so that the type `[closure@$DIR/missing-lifetimes-in-signature-2.rs:20:13: 23:6]` will meet its required lifetime bounds
--> $DIR/missing-lifetimes-in-signature-2.rs:20:9
|

39
src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature.nll.stderr
View file

@ -25,14 +25,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the function body at 25:1...
--> $DIR/missing-lifetimes-in-signature.rs:25:1
note: the parameter type `G` must be valid for the anonymous lifetime defined on the function body at 25:26...
--> $DIR/missing-lifetimes-in-signature.rs:25:26
|
LL | / fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
LL | |
LL | | where
LL | | G: Get<T>
| |_____________^
LL | fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^
error[E0311]: the parameter type `G` may not live long enough
--> $DIR/missing-lifetimes-in-signature.rs:47:45
@ -40,14 +37,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the function body at 47:1...
--> $DIR/missing-lifetimes-in-signature.rs:47:1
note: the parameter type `G` must be valid for the anonymous lifetime defined on the function body at 47:34...
--> $DIR/missing-lifetimes-in-signature.rs:47:34
|
LL | / fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
LL | |
LL | | where
LL | | G: Get<T>
| |_____________^
LL | fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^
error[E0311]: the parameter type `G` may not live long enough
--> $DIR/missing-lifetimes-in-signature.rs:59:58
@ -55,11 +49,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn qux<'b, G: Get<T> + 'b, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ {
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the method body at 59:5...
--> $DIR/missing-lifetimes-in-signature.rs:59:5
note: the parameter type `G` must be valid for the anonymous lifetime defined on the method body at 59:47...
--> $DIR/missing-lifetimes-in-signature.rs:59:47
|
LL | fn qux<'b, G: Get<T> + 'b, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^
error[E0311]: the parameter type `G` may not live long enough
--> $DIR/missing-lifetimes-in-signature.rs:68:45
@ -67,14 +61,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn bat<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ + 'a
| ^^^^^^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the function body at 68:1...
--> $DIR/missing-lifetimes-in-signature.rs:68:1
note: the parameter type `G` must be valid for the anonymous lifetime defined on the function body at 68:34...
--> $DIR/missing-lifetimes-in-signature.rs:68:34
|
LL | / fn bat<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ + 'a
LL | |
LL | | where
LL | | G: Get<T>
| |_____________^
LL | fn bat<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ + 'a
| ^^^^^^
error[E0621]: explicit lifetime required in the type of `dest`
--> $DIR/missing-lifetimes-in-signature.rs:73:5

28
src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature.stderr
View file

@ -33,14 +33,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the function body at 25:1...
--> $DIR/missing-lifetimes-in-signature.rs:25:1
note: the parameter type `G` must be valid for the anonymous lifetime defined on the function body at 25:26...
--> $DIR/missing-lifetimes-in-signature.rs:25:26
|
LL | / fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
LL | |
LL | | where
LL | | G: Get<T>
| |_____________^
LL | fn bar<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^
note: ...so that the type `[closure@$DIR/missing-lifetimes-in-signature.rs:30:5: 32:6]` will meet its required lifetime bounds
--> $DIR/missing-lifetimes-in-signature.rs:25:37
|
@ -57,14 +54,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the function body at 47:1...
--> $DIR/missing-lifetimes-in-signature.rs:47:1
note: the parameter type `G` must be valid for the anonymous lifetime defined on the function body at 47:34...
--> $DIR/missing-lifetimes-in-signature.rs:47:34
|
LL | / fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
LL | |
LL | | where
LL | | G: Get<T>
| |_____________^
LL | fn qux<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
| ^^^^^^
note: ...so that the type `[closure@$DIR/missing-lifetimes-in-signature.rs:52:5: 54:6]` will meet its required lifetime bounds
--> $DIR/missing-lifetimes-in-signature.rs:47:45
|
@ -81,11 +75,11 @@ error[E0311]: the parameter type `G` may not live long enough
LL | fn qux<'b, G: Get<T> + 'b, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ {
| ^^^^^^^^^^^^^^^^^^
|
note: the parameter type `G` must be valid for the anonymous lifetime #1 defined on the method body at 59:5...
--> $DIR/missing-lifetimes-in-signature.rs:59:5
note: the parameter type `G` must be valid for the anonymous lifetime defined on the method body at 59:47...
--> $DIR/missing-lifetimes-in-signature.rs:59:47
|
LL | fn qux<'b, G: Get<T> + 'b, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^
note: ...so that the type `[closure@$DIR/missing-lifetimes-in-signature.rs:61:9: 63:10]` will meet its required lifetime bounds
--> $DIR/missing-lifetimes-in-signature.rs:59:58
|

24
src/test/ui/ufcs/ufcs-explicit-self-bad.stderr
View file

@ -33,11 +33,11 @@ LL | fn dummy2(self: &Bar<T>) {}
|
= note: expected reference `&'a Bar<T>`
found reference `&Bar<T>`
note: the anonymous lifetime #1 defined on the method body at 37:5...
--> $DIR/ufcs-explicit-self-bad.rs:37:5
note: the anonymous lifetime defined on the method body at 37:21...
--> $DIR/ufcs-explicit-self-bad.rs:37:21
|
LL | fn dummy2(self: &Bar<T>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^
note: ...does not necessarily outlive the lifetime `'a` as defined on the impl at 35:6
--> $DIR/ufcs-explicit-self-bad.rs:35:6
|
@ -57,11 +57,11 @@ note: the lifetime `'a` as defined on the impl at 35:6...
|
LL | impl<'a, T> SomeTrait for &'a Bar<T> {
| ^^
note: ...does not necessarily outlive the anonymous lifetime #1 defined on the method body at 37:5
--> $DIR/ufcs-explicit-self-bad.rs:37:5
note: ...does not necessarily outlive the anonymous lifetime defined on the method body at 37:21
--> $DIR/ufcs-explicit-self-bad.rs:37:21
|
LL | fn dummy2(self: &Bar<T>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^
error[E0308]: mismatched `self` parameter type
--> $DIR/ufcs-explicit-self-bad.rs:39:21
@ -71,11 +71,11 @@ LL | fn dummy3(self: &&Bar<T>) {}
|
= note: expected reference `&'a Bar<T>`
found reference `&Bar<T>`
note: the anonymous lifetime #2 defined on the method body at 39:5...
--> $DIR/ufcs-explicit-self-bad.rs:39:5
note: the anonymous lifetime defined on the method body at 39:22...
--> $DIR/ufcs-explicit-self-bad.rs:39:22
|
LL | fn dummy3(self: &&Bar<T>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^
note: ...does not necessarily outlive the lifetime `'a` as defined on the impl at 35:6
--> $DIR/ufcs-explicit-self-bad.rs:35:6
|
@ -95,11 +95,11 @@ note: the lifetime `'a` as defined on the impl at 35:6...
|
LL | impl<'a, T> SomeTrait for &'a Bar<T> {
| ^^
note: ...does not necessarily outlive the anonymous lifetime #2 defined on the method body at 39:5
--> $DIR/ufcs-explicit-self-bad.rs:39:5
note: ...does not necessarily outlive the anonymous lifetime defined on the method body at 39:22
--> $DIR/ufcs-explicit-self-bad.rs:39:22
|
LL | fn dummy3(self: &&Bar<T>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^
error: aborting due to 7 previous errors