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Rollup merge of #89914 - jackh726:gat_genericboundfailure, r=estebank

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Emit impl difference error for GenericBoundFailure too

Fixes #86787

r? ````@estebank````
This commit is contained in:
Matthias Krüger 2021-10-16 08:02:24 +02:00 committed by GitHub
commit e8efe0931a
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 22 additions and 17 deletions
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4
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/trait_impl_difference.rs
View File

@ -46,7 +46,9 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
}
}
}
if let RegionResolutionError::ConcreteFailure(origin, _, _) = error.clone() {
if let RegionResolutionError::ConcreteFailure(origin, _, _)
| RegionResolutionError::GenericBoundFailure(origin, _, _) = error.clone()
{
if let SubregionOrigin::CompareImplTypeObligation {
span,
item_name,

2
src/test/ui/generic-associated-types/impl_bounds.rs
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@ -13,7 +13,7 @@ struct Fooy<T>(T);
impl<T> Foo for Fooy<T> {
type A<'a> where Self: 'static = (&'a ());
//~^ ERROR the parameter type `T` may not live long enough
//~^ ERROR `impl` associated type
type B<'a, 'b> where 'b: 'a = (&'a(), &'b ());
//~^ ERROR `impl` associated type
//~| ERROR lifetime bound not satisfied

12
src/test/ui/generic-associated-types/impl_bounds.stderr
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@ -1,11 +1,11 @@
error[E0310]: the parameter type `T` may not live long enough
error: `impl` associated type signature for `A` doesn't match `trait` associated type signature
--> $DIR/impl_bounds.rs:15:5
|
LL | type A<'a> where Self: 'a;
| -------------------------- expected
...
LL | type A<'a> where Self: 'static = (&'a ());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: consider adding an explicit lifetime bound `T: 'static`...
= note: ...so that the definition in impl matches the definition from the trait
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found
error: `impl` associated type signature for `B` doesn't match `trait` associated type signature
--> $DIR/impl_bounds.rs:17:5
@ -85,5 +85,5 @@ LL | impl<T: std::marker::Copy> Foo for Fooy<T> {
error: aborting due to 5 previous errors
Some errors have detailed explanations: E0277, E0310, E0478.
Some errors have detailed explanations: E0277, E0478.
For more information about an error, try `rustc --explain E0277`.

4
src/test/ui/generic-associated-types/issue-86787.rs
View File

@ -21,8 +21,8 @@ where
{
type T = Either<Left::T, Right::T>;
type TRef<'a>
//~^ the associated type
//~^^ the associated type
//~^ `impl` associated type signature
//~^^ `impl` associated type signature
where
<Left as HasChildrenOf>::T: 'a,
<Right as HasChildrenOf>::T: 'a

17
src/test/ui/generic-associated-types/issue-86787.stderr
View File

@ -1,29 +1,32 @@
error[E0309]: the associated type `<Left as HasChildrenOf>::T` may not live long enough
error: `impl` associated type signature for `TRef` doesn't match `trait` associated type signature
--> $DIR/issue-86787.rs:23:5
|
LL | type TRef<'a>;
| -------------- expected
...
LL | / type TRef<'a>
LL | |
LL | |
LL | | where
LL | | <Left as HasChildrenOf>::T: 'a,
LL | | <Right as HasChildrenOf>::T: 'a
| | - help: consider adding a where clause: `, <Left as HasChildrenOf>::T: 'a`
LL | | = Either<&'a Left::T, &'a Right::T>;
| |________________________________________^ ...so that the definition in impl matches the definition from the trait
| |________________________________________^ found
error[E0309]: the associated type `<Right as HasChildrenOf>::T` may not live long enough
error: `impl` associated type signature for `TRef` doesn't match `trait` associated type signature
--> $DIR/issue-86787.rs:23:5
|
LL | type TRef<'a>;
| -------------- expected
...
LL | / type TRef<'a>
LL | |
LL | |
LL | | where
LL | | <Left as HasChildrenOf>::T: 'a,
LL | | <Right as HasChildrenOf>::T: 'a
| | - help: consider adding a where clause: `, <Right as HasChildrenOf>::T: 'a`
LL | | = Either<&'a Left::T, &'a Right::T>;
| |________________________________________^ ...so that the definition in impl matches the definition from the trait
| |________________________________________^ found
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0309`.