Rollup merge of #136559 - compiler-errors:resolve-regions-for-type-test-failure, r=BoxyUwU
Resolve named regions when reporting type test failures in NLL Just a improvement tweak to an error message that I broke out of a bigger PR that I had to close lol
This commit is contained in:
Jacob Pratt
GitHub
commit
4e6605fb0d
5 changed files with 38 additions and 19 deletions
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@ -316,13 +316,16 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
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let type_test_span = type_test.span;
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if let Some(lower_bound_region) = lower_bound_region {
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let generic_ty = type_test.generic_kind.to_ty(self.infcx.tcx);
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let generic_ty = self.regioncx.name_regions(
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self.infcx.tcx,
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type_test.generic_kind.to_ty(self.infcx.tcx),
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);
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let origin = RelateParamBound(type_test_span, generic_ty, None);
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self.buffer_error(self.infcx.err_ctxt().construct_generic_bound_failure(
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self.body.source.def_id().expect_local(),
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type_test_span,
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Some(origin),
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type_test.generic_kind,
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self.regioncx.name_regions(self.infcx.tcx, type_test.generic_kind),
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lower_bound_region,
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));
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} else {
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@ -23,16 +23,20 @@ LL | | T: Anything<'b, 'c>,
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= note: defining type: no_relationships_late::<'?1, '?2, T>
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error[E0309]: the associated type `<T as Anything<'?5, '?6>>::AssocType` may not live long enough
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error[E0309]: the associated type `<T as Anything<'b/#0, 'c/#1>>::AssocType` may not live long enough
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--> $DIR/projection-two-region-trait-bound-closure.rs:38:39
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LL | fn no_relationships_late<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
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| -- the associated type `<T as Anything<'?5, '?6>>::AssocType` must be valid for the lifetime `'a` as defined here...
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| -- the associated type `<T as Anything<'b/#0, 'c/#1>>::AssocType` must be valid for the lifetime `'a` as defined here...
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...
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LL | with_signature(cell, t, |cell, t| require(cell, t));
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as Anything<'?5, '?6>>::AssocType` will meet its required lifetime bounds
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as Anything<'b/#0, 'c/#1>>::AssocType` will meet its required lifetime bounds
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help: consider adding an explicit lifetime bound
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LL - T: Anything<'b, 'c>,
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LL + T: Anything<'b, 'c>, <T as Anything<'b/#0, 'c/#1>>::AssocType: 'a
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= help: consider adding an explicit lifetime bound `<T as Anything<'?5, '?6>>::AssocType: 'a`...
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note: external requirements
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--> $DIR/projection-two-region-trait-bound-closure.rs:48:29
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@ -59,16 +63,20 @@ LL | | 'a: 'a,
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= note: defining type: no_relationships_early::<'?1, '?2, '?3, T>
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error[E0309]: the associated type `<T as Anything<'?6, '?7>>::AssocType` may not live long enough
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error[E0309]: the associated type `<T as Anything<'b/#1, 'c/#2>>::AssocType` may not live long enough
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--> $DIR/projection-two-region-trait-bound-closure.rs:48:39
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LL | fn no_relationships_early<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
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| -- the associated type `<T as Anything<'?6, '?7>>::AssocType` must be valid for the lifetime `'a` as defined here...
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| -- the associated type `<T as Anything<'b/#1, 'c/#2>>::AssocType` must be valid for the lifetime `'a` as defined here...
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...
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LL | with_signature(cell, t, |cell, t| require(cell, t));
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as Anything<'?6, '?7>>::AssocType` will meet its required lifetime bounds
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as Anything<'b/#1, 'c/#2>>::AssocType` will meet its required lifetime bounds
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help: consider adding an explicit lifetime bound
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LL - 'a: 'a,
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LL + 'a: 'a, <T as Anything<'b/#1, 'c/#2>>::AssocType: 'a
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= help: consider adding an explicit lifetime bound `<T as Anything<'?6, '?7>>::AssocType: 'a`...
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note: external requirements
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--> $DIR/projection-two-region-trait-bound-closure.rs:61:29
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@ -1,13 +1,17 @@
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error[E0309]: the associated type `<T as MyTrait<'_>>::Output` may not live long enough
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error[E0309]: the associated type `<T as MyTrait<'a>>::Output` may not live long enough
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--> $DIR/projection-where-clause-env-wrong-bound.rs:15:5
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LL | fn foo1<'a, 'b, T>() -> &'a ()
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| -- the associated type `<T as MyTrait<'_>>::Output` must be valid for the lifetime `'a` as defined here...
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| -- the associated type `<T as MyTrait<'a>>::Output` must be valid for the lifetime `'a` as defined here...
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...
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LL | bar::<T::Output>()
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as MyTrait<'_>>::Output` will meet its required lifetime bounds
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| ^^^^^^^^^^^^^^^^ ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds
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help: consider adding an explicit lifetime bound
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LL - <T as MyTrait<'a>>::Output: 'b,
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LL + <T as MyTrait<'a>>::Output: 'b, <T as MyTrait<'a>>::Output: 'a
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= help: consider adding an explicit lifetime bound `<T as MyTrait<'_>>::Output: 'a`...
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error: aborting due to 1 previous error
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@ -12,7 +12,7 @@ where
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<T as MyTrait<'b>>::Output: 'a,
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{
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bar::<<T as MyTrait<'a>>::Output>()
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//~^ ERROR the associated type `<T as MyTrait<'_>>::Output` may not live long enough
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//~^ ERROR the associated type `<T as MyTrait<'a>>::Output` may not live long enough
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}
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fn bar<'a, T>() -> &'a ()
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@ -1,13 +1,17 @@
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error[E0309]: the associated type `<T as MyTrait<'_>>::Output` may not live long enough
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error[E0309]: the associated type `<T as MyTrait<'a>>::Output` may not live long enough
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--> $DIR/projection-where-clause-env-wrong-lifetime.rs:14:5
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LL | fn foo1<'a, 'b, T>() -> &'a ()
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| -- the associated type `<T as MyTrait<'_>>::Output` must be valid for the lifetime `'a` as defined here...
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| -- the associated type `<T as MyTrait<'a>>::Output` must be valid for the lifetime `'a` as defined here...
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...
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LL | bar::<<T as MyTrait<'a>>::Output>()
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `<T as MyTrait<'_>>::Output` will meet its required lifetime bounds
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds
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help: consider adding an explicit lifetime bound
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LL - <T as MyTrait<'b>>::Output: 'a,
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LL + <T as MyTrait<'b>>::Output: 'a, <T as MyTrait<'a>>::Output: 'a
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= help: consider adding an explicit lifetime bound `<T as MyTrait<'_>>::Output: 'a`...
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error: aborting due to 1 previous error
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