diff options
49 files changed, 389 insertions, 395 deletions
diff --git a/compiler/rustc_middle/src/traits/mod.rs b/compiler/rustc_middle/src/traits/mod.rs index aea58653351..a04bd636622 100644 --- a/compiler/rustc_middle/src/traits/mod.rs +++ b/compiler/rustc_middle/src/traits/mod.rs @@ -618,6 +618,7 @@ pub enum SelectionError<'tcx> { OpaqueTypeAutoTraitLeakageUnknown(DefId), } +// FIXME(@lcnr): The `Binder` here should be unnecessary. Just use `TraitRef` instead. #[derive(Clone, Debug, TypeVisitable)] pub struct SignatureMismatchData<'tcx> { pub found_trait_ref: ty::PolyTraitRef<'tcx>, diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs index d18acb8c864..b85a05c774f 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs @@ -3409,6 +3409,8 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { self.dcx().try_steal_replace_and_emit_err(self.tcx.def_span(def_id), StashKey::Cycle, err) } + // FIXME(@lcnr): This function could be changed to trait `TraitRef` directly + // instead of using a `Binder`. fn report_signature_mismatch_error( &self, obligation: &PredicateObligation<'tcx>, diff --git a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs index 89654ed61ae..49091e53be7 100644 --- a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs +++ b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs @@ -165,7 +165,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { let poly_trait_predicate = self.infcx.resolve_vars_if_possible(obligation.predicate); let placeholder_trait_predicate = self.infcx.enter_forall_and_leak_universe(poly_trait_predicate); - debug!(?placeholder_trait_predicate); // The bounds returned by `item_bounds` may contain duplicates after // normalization, so try to deduplicate when possible to avoid @@ -184,8 +183,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { selcx.infcx.probe(|_| { match selcx.match_normalize_trait_ref( obligation, - bound.to_poly_trait_ref(), placeholder_trait_predicate.trait_ref, + bound.to_poly_trait_ref(), ) { Ok(None) => { candidates.vec.push(ProjectionCandidate(idx)); @@ -881,8 +880,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { self.infcx.probe(|_| { self.match_normalize_trait_ref( obligation, - upcast_trait_ref, placeholder_trait_predicate.trait_ref, + upcast_trait_ref, ) .is_ok() }) diff --git a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs index 70f6b240ab7..51fc223a5d1 100644 --- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs +++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs @@ -9,7 +9,7 @@ use rustc_ast::Mutability; use rustc_data_structures::stack::ensure_sufficient_stack; use rustc_hir::lang_items::LangItem; -use rustc_infer::infer::BoundRegionConversionTime::HigherRankedType; +use rustc_infer::infer::HigherRankedType; use rustc_infer::infer::{DefineOpaqueTypes, InferOk}; use rustc_middle::traits::{BuiltinImplSource, SignatureMismatchData}; use rustc_middle::ty::{ @@ -161,8 +161,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { let placeholder_trait_predicate = self.infcx.enter_forall_and_leak_universe(trait_predicate).trait_ref; let placeholder_self_ty = placeholder_trait_predicate.self_ty(); - let placeholder_trait_predicate = ty::Binder::dummy(placeholder_trait_predicate); - let candidate_predicate = self .for_each_item_bound( placeholder_self_ty, @@ -182,6 +180,11 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { .expect("projection candidate is not a trait predicate") .map_bound(|t| t.trait_ref); + let candidate = self.infcx.instantiate_binder_with_fresh_vars( + obligation.cause.span, + HigherRankedType, + candidate, + ); let mut obligations = Vec::new(); let candidate = normalize_with_depth_to( self, @@ -195,7 +198,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { obligations.extend( self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, placeholder_trait_predicate, candidate) + .eq(DefineOpaqueTypes::No, placeholder_trait_predicate, candidate) .map(|InferOk { obligations, .. }| obligations) .map_err(|_| Unimplemented)?, ); @@ -499,7 +502,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { let trait_predicate = self.infcx.enter_forall_and_leak_universe(obligation.predicate); let self_ty = self.infcx.shallow_resolve(trait_predicate.self_ty()); - let obligation_trait_ref = ty::Binder::dummy(trait_predicate.trait_ref); let ty::Dynamic(data, ..) = *self_ty.kind() else { span_bug!(obligation.cause.span, "object candidate with non-object"); }; @@ -520,19 +522,24 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { let unnormalized_upcast_trait_ref = supertraits.nth(index).expect("supertraits iterator no longer has as many elements"); + let upcast_trait_ref = self.infcx.instantiate_binder_with_fresh_vars( + obligation.cause.span, + HigherRankedType, + unnormalized_upcast_trait_ref, + ); let upcast_trait_ref = normalize_with_depth_to( self, obligation.param_env, obligation.cause.clone(), obligation.recursion_depth + 1, - unnormalized_upcast_trait_ref, + upcast_trait_ref, &mut nested, ); nested.extend( self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, obligation_trait_ref, upcast_trait_ref) + .eq(DefineOpaqueTypes::No, trait_predicate.trait_ref, upcast_trait_ref) .map(|InferOk { obligations, .. }| obligations) .map_err(|_| Unimplemented)?, ); @@ -1021,7 +1028,13 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { obligation: &PolyTraitObligation<'tcx>, self_ty_trait_ref: ty::PolyTraitRef<'tcx>, ) -> Result<Vec<PredicateObligation<'tcx>>, SelectionError<'tcx>> { - let obligation_trait_ref = obligation.predicate.to_poly_trait_ref(); + let obligation_trait_ref = + self.infcx.enter_forall_and_leak_universe(obligation.predicate.to_poly_trait_ref()); + let self_ty_trait_ref = self.infcx.instantiate_binder_with_fresh_vars( + obligation.cause.span, + HigherRankedType, + self_ty_trait_ref, + ); // Normalize the obligation and expected trait refs together, because why not let Normalized { obligations: nested, value: (obligation_trait_ref, expected_trait_ref) } = ensure_sufficient_stack(|| { @@ -1037,15 +1050,15 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { // needed to define opaque types for tests/ui/type-alias-impl-trait/assoc-projection-ice.rs self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::Yes, obligation_trait_ref, expected_trait_ref) + .eq(DefineOpaqueTypes::Yes, obligation_trait_ref, expected_trait_ref) .map(|InferOk { mut obligations, .. }| { obligations.extend(nested); obligations }) .map_err(|terr| { SignatureMismatch(Box::new(SignatureMismatchData { - expected_trait_ref: obligation_trait_ref, - found_trait_ref: expected_trait_ref, + expected_trait_ref: ty::Binder::dummy(obligation_trait_ref), + found_trait_ref: ty::Binder::dummy(expected_trait_ref), terr, })) }) diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index a6bd1ba9c3f..be748de1b17 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -33,6 +33,7 @@ use rustc_errors::{Diag, EmissionGuarantee}; use rustc_hir as hir; use rustc_hir::def_id::DefId; use rustc_infer::infer::BoundRegionConversionTime; +use rustc_infer::infer::BoundRegionConversionTime::HigherRankedType; use rustc_infer::infer::DefineOpaqueTypes; use rustc_infer::traits::TraitObligation; use rustc_middle::dep_graph::dep_kinds; @@ -1651,15 +1652,20 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { fn match_normalize_trait_ref( &mut self, obligation: &PolyTraitObligation<'tcx>, - trait_bound: ty::PolyTraitRef<'tcx>, placeholder_trait_ref: ty::TraitRef<'tcx>, - ) -> Result<Option<ty::PolyTraitRef<'tcx>>, ()> { + trait_bound: ty::PolyTraitRef<'tcx>, + ) -> Result<Option<ty::TraitRef<'tcx>>, ()> { debug_assert!(!placeholder_trait_ref.has_escaping_bound_vars()); if placeholder_trait_ref.def_id != trait_bound.def_id() { // Avoid unnecessary normalization return Err(()); } + let trait_bound = self.infcx.instantiate_binder_with_fresh_vars( + obligation.cause.span, + HigherRankedType, + trait_bound, + ); let Normalized { value: trait_bound, obligations: _ } = ensure_sufficient_stack(|| { normalize_with_depth( self, @@ -1671,7 +1677,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { }); self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, ty::Binder::dummy(placeholder_trait_ref), trait_bound) + .eq(DefineOpaqueTypes::No, placeholder_trait_ref, trait_bound) .map(|InferOk { obligations: _, value: () }| { // This method is called within a probe, so we can't have // inference variables and placeholders escape. @@ -1683,7 +1689,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { }) .map_err(|_| ()) } - fn where_clause_may_apply<'o>( &mut self, stack: &TraitObligationStack<'o, 'tcx>, @@ -1733,7 +1738,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { let is_match = self .infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, obligation.predicate, infer_projection) + .eq(DefineOpaqueTypes::No, obligation.predicate, infer_projection) .is_ok_and(|InferOk { obligations, value: () }| { self.evaluate_predicates_recursively( TraitObligationStackList::empty(&ProvisionalEvaluationCache::default()), @@ -2533,7 +2538,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> { nested.extend( self.infcx .at(&obligation.cause, obligation.param_env) - .sup( + .eq( DefineOpaqueTypes::No, upcast_principal.map_bound(|trait_ref| { ty::ExistentialTraitRef::erase_self_ty(tcx, trait_ref) @@ -2571,7 +2576,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> { nested.extend( self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, source_projection, target_projection) + .eq(DefineOpaqueTypes::No, source_projection, target_projection) .map_err(|_| SelectionError::Unimplemented)? .into_obligations(), ); @@ -2615,9 +2620,15 @@ impl<'tcx> SelectionContext<'_, 'tcx> { obligation: &PolyTraitObligation<'tcx>, poly_trait_ref: ty::PolyTraitRef<'tcx>, ) -> Result<Vec<PredicateObligation<'tcx>>, ()> { + let predicate = self.infcx.enter_forall_and_leak_universe(obligation.predicate); + let trait_ref = self.infcx.instantiate_binder_with_fresh_vars( + obligation.cause.span, + HigherRankedType, + poly_trait_ref, + ); self.infcx .at(&obligation.cause, obligation.param_env) - .sup(DefineOpaqueTypes::No, obligation.predicate.to_poly_trait_ref(), poly_trait_ref) + .eq(DefineOpaqueTypes::No, predicate.trait_ref, trait_ref) .map(|InferOk { obligations, .. }| obligations) .map_err(|_| ()) } diff --git a/compiler/rustc_trait_selection/src/traits/vtable.rs b/compiler/rustc_trait_selection/src/traits/vtable.rs index 3c0316fce17..46a68508753 100644 --- a/compiler/rustc_trait_selection/src/traits/vtable.rs +++ b/compiler/rustc_trait_selection/src/traits/vtable.rs @@ -320,6 +320,7 @@ fn vtable_entries<'tcx>( } /// Find slot base for trait methods within vtable entries of another trait +// FIXME(@lcnr): This isn't a query, so why does it take a tuple as its argument. pub(super) fn vtable_trait_first_method_offset<'tcx>( tcx: TyCtxt<'tcx>, key: ( diff --git a/tests/ui/associated-type-bounds/dedup-normalized-1.rs b/tests/ui/associated-type-bounds/dedup-normalized-1.rs new file mode 100644 index 00000000000..5329018e79f --- /dev/null +++ b/tests/ui/associated-type-bounds/dedup-normalized-1.rs @@ -0,0 +1,24 @@ +//@ check-pass + +// We try to prove `T::Rigid: Into<?0>` and have 2 candidates from where-clauses: +// +// - `Into<String>` +// - `Into<<T::Rigid as Elaborate>::Assoc>` +// +// This causes ambiguity unless we normalize the alias in the second candidate +// to detect that they actually result in the same constraints. +trait Trait { + type Rigid: Elaborate<Assoc = String> + Into<String>; +} + +trait Elaborate: Into<Self::Assoc> { + type Assoc; +} + +fn impls<T: Into<U>, U>(_: T) {} + +fn test<P: Trait>(rigid: P::Rigid) { + impls(rigid); +} + +fn main() {} diff --git a/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.rs b/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.rs new file mode 100644 index 00000000000..9224d47d30f --- /dev/null +++ b/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.rs @@ -0,0 +1,27 @@ +// We try to prove `for<'b> T::Rigid: Bound<'b, ?0>` and have 2 candidates from where-clauses: +// +// - `for<'a> Bound<'a, String>` +// - `for<'a> Bound<'a, <T::Rigid as Elaborate>::Assoc>` +// +// This causes ambiguity unless we normalize the alias in the second candidate +// to detect that they actually result in the same constraints. We currently +// fail to detect that the constraints from these bounds are equal and error +// with ambiguity. +trait Bound<'a, U> {} + +trait Trait { + type Rigid: Elaborate<Assoc = String> + for<'a> Bound<'a, String>; +} + +trait Elaborate: for<'a> Bound<'a, Self::Assoc> { + type Assoc; +} + +fn impls<T: for<'b> Bound<'b, U>, U>(_: T) {} + +fn test<P: Trait>(rigid: P::Rigid) { + impls(rigid); + //~^ ERROR type annotations needed +} + +fn main() {} diff --git a/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.stderr b/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.stderr new file mode 100644 index 00000000000..372d379de5a --- /dev/null +++ b/tests/ui/associated-type-bounds/dedup-normalized-2-higher-ranked.stderr @@ -0,0 +1,20 @@ +error[E0283]: type annotations needed + --> $DIR/dedup-normalized-2-higher-ranked.rs:23:5 + | +LL | impls(rigid); + | ^^^^^ cannot infer type of the type parameter `U` declared on the function `impls` + | + = note: cannot satisfy `for<'b> <P as Trait>::Rigid: Bound<'b, _>` +note: required by a bound in `impls` + --> $DIR/dedup-normalized-2-higher-ranked.rs:20:13 + | +LL | fn impls<T: for<'b> Bound<'b, U>, U>(_: T) {} + | ^^^^^^^^^^^^^^^^^^^^ required by this bound in `impls` +help: consider specifying the generic arguments + | +LL | impls::<<P as Trait>::Rigid, U>(rigid); + | ++++++++++++++++++++++++++ + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0283`. diff --git a/tests/ui/async-await/return-type-notation/issue-110963-early.stderr b/tests/ui/async-await/return-type-notation/issue-110963-early.stderr index feae2698e8f..23ede089b5a 100644 --- a/tests/ui/async-await/return-type-notation/issue-110963-early.stderr +++ b/tests/ui/async-await/return-type-notation/issue-110963-early.stderr @@ -7,7 +7,7 @@ LL | #![feature(return_type_notation)] = note: see issue #109417 <https://github.com/rust-lang/rust/issues/109417> for more information = note: `#[warn(incomplete_features)]` on by default -error[E0308]: mismatched types +error: implementation of `Send` is not general enough --> $DIR/issue-110963-early.rs:14:5 | LL | / spawn(async move { @@ -16,17 +16,12 @@ LL | | if !hc.check().await { LL | | log_health_check_failure().await; LL | | } LL | | }); - | |______^ one type is more general than the other + | |______^ implementation of `Send` is not general enough | - = note: expected trait `Send` - found trait `for<'a> Send` -note: the lifetime requirement is introduced here - --> $DIR/issue-110963-early.rs:34:17 - | -LL | F: Future + Send + 'static, - | ^^^^ + = note: `Send` would have to be implemented for the type `impl Future<Output = bool> { <HC as HealthCheck>::check<'0>() }`, for any two lifetimes `'0` and `'1`... + = note: ...but `Send` is actually implemented for the type `impl Future<Output = bool> { <HC as HealthCheck>::check<'2>() }`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `Send` is not general enough --> $DIR/issue-110963-early.rs:14:5 | LL | / spawn(async move { @@ -35,17 +30,11 @@ LL | | if !hc.check().await { LL | | log_health_check_failure().await; LL | | } LL | | }); - | |______^ one type is more general than the other - | - = note: expected trait `Send` - found trait `for<'a> Send` -note: the lifetime requirement is introduced here - --> $DIR/issue-110963-early.rs:34:17 + | |______^ implementation of `Send` is not general enough | -LL | F: Future + Send + 'static, - | ^^^^ + = note: `Send` would have to be implemented for the type `impl Future<Output = bool> { <HC as HealthCheck>::check<'0>() }`, for any two lifetimes `'0` and `'1`... + = note: ...but `Send` is actually implemented for the type `impl Future<Output = bool> { <HC as HealthCheck>::check<'2>() }`, for some specific lifetime `'2` = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 2 previous errors; 1 warning emitted -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/closures/multiple-fn-bounds.stderr b/tests/ui/closures/multiple-fn-bounds.stderr index 9a49fc99ac3..861b39b4d07 100644 --- a/tests/ui/closures/multiple-fn-bounds.stderr +++ b/tests/ui/closures/multiple-fn-bounds.stderr @@ -8,7 +8,7 @@ LL | foo(move |x| v); | expected due to this | = note: expected closure signature `fn(_) -> _` - found closure signature `for<'a> fn(&'a _) -> _` + found closure signature `fn(&_) -> _` note: closure inferred to have a different signature due to this bound --> $DIR/multiple-fn-bounds.rs:1:11 | diff --git a/tests/ui/coroutine/resume-arg-late-bound.rs b/tests/ui/coroutine/resume-arg-late-bound.rs index dd6d318afbc..3c2ab41047e 100644 --- a/tests/ui/coroutine/resume-arg-late-bound.rs +++ b/tests/ui/coroutine/resume-arg-late-bound.rs @@ -13,5 +13,5 @@ fn main() { *arg = true; }; test(gen); - //~^ ERROR mismatched types + //~^ ERROR implementation of `Coroutine` is not general enough } diff --git a/tests/ui/coroutine/resume-arg-late-bound.stderr b/tests/ui/coroutine/resume-arg-late-bound.stderr index a97cc6190fd..4a4ee08c529 100644 --- a/tests/ui/coroutine/resume-arg-late-bound.stderr +++ b/tests/ui/coroutine/resume-arg-late-bound.stderr @@ -1,17 +1,11 @@ -error[E0308]: mismatched types +error: implementation of `Coroutine` is not general enough --> $DIR/resume-arg-late-bound.rs:15:5 | LL | test(gen); - | ^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^ implementation of `Coroutine` is not general enough | - = note: expected trait `for<'a> Coroutine<&'a mut bool>` - found trait `Coroutine<&mut bool>` -note: the lifetime requirement is introduced here - --> $DIR/resume-arg-late-bound.rs:8:17 - | -LL | fn test(a: impl for<'a> Coroutine<&'a mut bool>) {} - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: `{coroutine@$DIR/resume-arg-late-bound.rs:11:15: 11:31}` must implement `Coroutine<&'1 mut bool>`, for any lifetime `'1`... + = note: ...but it actually implements `Coroutine<&'2 mut bool>`, for some specific lifetime `'2` error: aborting due to 1 previous error -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/generic-associated-types/bugs/issue-88382.stderr b/tests/ui/generic-associated-types/bugs/issue-88382.stderr index 9b061528e3b..0f5e394ab61 100644 --- a/tests/ui/generic-associated-types/bugs/issue-88382.stderr +++ b/tests/ui/generic-associated-types/bugs/issue-88382.stderr @@ -1,26 +1,21 @@ -error[E0631]: type mismatch in function arguments +error[E0283]: type annotations needed --> $DIR/issue-88382.rs:26:40 | LL | do_something(SomeImplementation(), test); - | ------------ ^^^^ expected due to this - | | - | required by a bound introduced by this call -... -LL | fn test<'a, I: Iterable>(_: &mut I::Iterator<'a>) {} - | ------------------------------------------------- found signature defined here + | ^^^^ cannot infer type of the type parameter `I` declared on the function `test` | - = note: expected function signature `for<'a> fn(&'a mut std::iter::Empty<usize>) -> _` - found function signature `for<'a, 'b> fn(&'b mut <_ as Iterable>::Iterator<'a>) -> _` -note: required by a bound in `do_something` - --> $DIR/issue-88382.rs:20:48 + = note: cannot satisfy `_: Iterable` + = help: the trait `Iterable` is implemented for `SomeImplementation` +note: required by a bound in `test` + --> $DIR/issue-88382.rs:29:16 | -LL | fn do_something<I: Iterable>(i: I, mut f: impl for<'a> Fn(&mut I::Iterator<'a>)) { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `do_something` -help: consider wrapping the function in a closure +LL | fn test<'a, I: Iterable>(_: &mut I::Iterator<'a>) {} + | ^^^^^^^^ required by this bound in `test` +help: consider specifying the generic argument | -LL | do_something(SomeImplementation(), |arg0: &mut std::iter::Empty<usize>| test(/* &mut <_ as Iterable>::Iterator<'_> */)); - | ++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++ +LL | do_something(SomeImplementation(), test::<I>); + | +++++ error: aborting due to 1 previous error -For more information about this error, try `rustc --explain E0631`. +For more information about this error, try `rustc --explain E0283`. diff --git a/tests/ui/generic-associated-types/issue-93340-1.next.stderr b/tests/ui/generic-associated-types/issue-93340-1.next.stderr new file mode 100644 index 00000000000..0a056c9857a --- /dev/null +++ b/tests/ui/generic-associated-types/issue-93340-1.next.stderr @@ -0,0 +1,53 @@ +error[E0283]: type annotations needed + --> $DIR/issue-93340-1.rs:16:5 + | +LL | cmp_eq + | ^^^^^^ cannot infer type of the type parameter `A` declared on the function `cmp_eq` + | + = note: cannot satisfy `_: Scalar` +note: required by a bound in `cmp_eq` + --> $DIR/issue-93340-1.rs:9:22 + | +LL | fn cmp_eq<'a, 'b, A: Scalar, B: Scalar, O: Scalar>(a: A::RefType<'a>, b: B::RefType<'b>) -> O { + | ^^^^^^ required by this bound in `cmp_eq` +help: consider specifying the generic arguments + | +LL | cmp_eq::<A, B, O> + | +++++++++++ + +error[E0275]: overflow evaluating the requirement `impl for<'a, 'b> Fn(<A as Scalar>::RefType<'a>, <B as Scalar>::RefType<'b>) -> O == for<'a, 'b> fn(..., ...) -> ... {cmp_eq::<..., ..., ...>}` + --> $DIR/issue-93340-1.rs:16:5 + | +LL | cmp_eq + | ^^^^^^ + | + = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_93340_1`) + +error[E0275]: overflow evaluating the requirement `impl for<'a, 'b> Fn(<A as Scalar>::RefType<'a>, <B as Scalar>::RefType<'b>) -> O == for<'a, 'b> fn(..., ...) -> ... {cmp_eq::<..., ..., ...>}` + --> $DIR/issue-93340-1.rs:16:5 + | +LL | cmp_eq + | ^^^^^^ + | + = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_93340_1`) + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +error[E0275]: overflow evaluating the requirement `for<'a, 'b> fn(<O as Scalar>::RefType<'a>, <_ as Scalar>::RefType<'b>) -> _ {cmp_eq::<O, ..., ...>} <: ...` + --> $DIR/issue-93340-1.rs:14:51 + | +LL | ) -> impl Fn(A::RefType<'_>, B::RefType<'_>) -> O { + | ___________________________________________________^ +LL | | +LL | | cmp_eq +LL | | +LL | | +LL | | +LL | | } + | |_^ + | + = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_93340_1`) + +error: aborting due to 4 previous errors + +Some errors have detailed explanations: E0275, E0283. +For more information about an error, try `rustc --explain E0275`. diff --git a/tests/ui/generic-associated-types/issue-93340-1.old.stderr b/tests/ui/generic-associated-types/issue-93340-1.old.stderr new file mode 100644 index 00000000000..8b6ab16bb0a --- /dev/null +++ b/tests/ui/generic-associated-types/issue-93340-1.old.stderr @@ -0,0 +1,20 @@ +error[E0283]: type annotations needed + --> $DIR/issue-93340-1.rs:16:5 + | +LL | cmp_eq + | ^^^^^^ cannot infer type of the type parameter `A` declared on the function `cmp_eq` + | + = note: cannot satisfy `_: Scalar` +note: required by a bound in `cmp_eq` + --> $DIR/issue-93340-1.rs:9:22 + | +LL | fn cmp_eq<'a, 'b, A: Scalar, B: Scalar, O: Scalar>(a: A::RefType<'a>, b: B::RefType<'b>) -> O { + | ^^^^^^ required by this bound in `cmp_eq` +help: consider specifying the generic arguments + | +LL | cmp_eq::<A, B, O> + | +++++++++++ + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0283`. diff --git a/tests/ui/generic-associated-types/issue-93340-1.rs b/tests/ui/generic-associated-types/issue-93340-1.rs new file mode 100644 index 00000000000..4d8ea9d8d48 --- /dev/null +++ b/tests/ui/generic-associated-types/issue-93340-1.rs @@ -0,0 +1,22 @@ +//@ revisions: old next +//@[next] compile-flags: -Znext-solver +pub trait Scalar: 'static { + type RefType<'a>: ScalarRef<'a>; +} + +pub trait ScalarRef<'a>: 'a {} + +fn cmp_eq<'a, 'b, A: Scalar, B: Scalar, O: Scalar>(a: A::RefType<'a>, b: B::RefType<'b>) -> O { + todo!() +} + +fn build_expression<A: Scalar, B: Scalar, O: Scalar>( +) -> impl Fn(A::RefType<'_>, B::RefType<'_>) -> O { + //[next]~^ ERROR overflow evaluating the requirement + cmp_eq + //~^ ERROR type annotations needed + //[next]~| ERROR overflow evaluating the requirement + //[next]~| ERROR overflow evaluating the requirement +} + +fn main() {} diff --git a/tests/ui/generic-associated-types/issue-93340.rs b/tests/ui/generic-associated-types/issue-93340-2.rs index 783f8c06ebf..b55ca845cd3 100644 --- a/tests/ui/generic-associated-types/issue-93340.rs +++ b/tests/ui/generic-associated-types/issue-93340-2.rs @@ -1,3 +1,5 @@ +//@ revisions: old next +//@[next] compile-flags: -Znext-solver //@ check-pass pub trait Scalar: 'static { @@ -12,7 +14,7 @@ fn cmp_eq<'a, 'b, A: Scalar, B: Scalar, O: Scalar>(a: A::RefType<'a>, b: B::RefT fn build_expression<A: Scalar, B: Scalar, O: Scalar>( ) -> impl Fn(A::RefType<'_>, B::RefType<'_>) -> O { - cmp_eq + cmp_eq::<A, B, O> } fn main() {} diff --git a/tests/ui/higher-ranked/higher-ranked-lifetime-error.rs b/tests/ui/higher-ranked/higher-ranked-lifetime-error.rs index aee5db83669..f89a37c8512 100644 --- a/tests/ui/higher-ranked/higher-ranked-lifetime-error.rs +++ b/tests/ui/higher-ranked/higher-ranked-lifetime-error.rs @@ -10,5 +10,5 @@ fn id(x: &String) -> &String { fn main() { assert_all::<_, &String>(id); - //~^ mismatched types + //~^ ERROR implementation of `FnMut` is not general enough } diff --git a/tests/ui/higher-ranked/higher-ranked-lifetime-error.stderr b/tests/ui/higher-ranked/higher-ranked-lifetime-error.stderr index c25e731d962..d7add865aa0 100644 --- a/tests/ui/higher-ranked/higher-ranked-lifetime-error.stderr +++ b/tests/ui/higher-ranked/higher-ranked-lifetime-error.stderr @@ -1,12 +1,11 @@ -error[E0308]: mismatched types +error: implementation of `FnMut` is not general enough --> $DIR/higher-ranked-lifetime-error.rs:12:5 | LL | assert_all::<_, &String>(id); - | ^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnMut` is not general enough | - = note: expected trait `for<'a> <for<'a> fn(&'a String) -> &'a String {id} as FnMut<(&'a String,)>>` - found trait `for<'a> <for<'a> fn(&'a String) -> &'a String {id} as FnMut<(&'a String,)>>` + = note: `for<'a> fn(&'a String) -> &'a String {id}` must implement `FnMut<(&String,)>` + = note: ...but it actually implements `FnMut<(&'0 String,)>`, for some specific lifetime `'0` error: aborting due to 1 previous error -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/higher-ranked/trait-bounds/issue-59311.rs b/tests/ui/higher-ranked/trait-bounds/issue-59311.rs index 387c78a802a..4e722dc0e80 100644 --- a/tests/ui/higher-ranked/trait-bounds/issue-59311.rs +++ b/tests/ui/higher-ranked/trait-bounds/issue-59311.rs @@ -6,17 +6,17 @@ // an error, but the regression test is here to ensure // that it does not ICE. See discussion on #74889 for details. -pub trait T { +pub trait Trait { fn t<F: Fn()>(&self, _: F) {} } pub fn crash<V>(v: &V) where - for<'a> &'a V: T + 'static, + for<'a> &'a V: Trait + 'static, { v.t(|| {}); - //~^ ERROR: higher-ranked lifetime error - //~| ERROR: higher-ranked lifetime error + //~^ ERROR: implementation of `Trait` is not general enough + //~| ERROR: implementation of `Trait` is not general enough //~| ERROR: higher-ranked lifetime error } diff --git a/tests/ui/higher-ranked/trait-bounds/issue-59311.stderr b/tests/ui/higher-ranked/trait-bounds/issue-59311.stderr index 3053a299802..f8bed86ccf5 100644 --- a/tests/ui/higher-ranked/trait-bounds/issue-59311.stderr +++ b/tests/ui/higher-ranked/trait-bounds/issue-59311.stderr @@ -1,18 +1,20 @@ -error: higher-ranked lifetime error +error: implementation of `Trait` is not general enough --> $DIR/issue-59311.rs:17:5 | LL | v.t(|| {}); - | ^^^^^^^^^^ + | ^^^^^^^^^^ implementation of `Trait` is not general enough | - = note: could not prove `{closure@$DIR/issue-59311.rs:17:9: 17:11} well-formed` + = note: `Trait` would have to be implemented for the type `&'a V` + = note: ...but `Trait` is actually implemented for the type `&'0 V`, for some specific lifetime `'0` -error: higher-ranked lifetime error +error: implementation of `Trait` is not general enough --> $DIR/issue-59311.rs:17:5 | LL | v.t(|| {}); - | ^^^^^^^^^^ + | ^^^^^^^^^^ implementation of `Trait` is not general enough | - = note: could not prove `{closure@$DIR/issue-59311.rs:17:9: 17:11} well-formed` + = note: `Trait` would have to be implemented for the type `&'a V` + = note: ...but `Trait` is actually implemented for the type `&'0 V`, for some specific lifetime `'0` = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: higher-ranked lifetime error diff --git a/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.rs b/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.rs index 4bd3b96e475..a44ed9e5ef5 100644 --- a/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.rs +++ b/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.rs @@ -43,9 +43,9 @@ fn main() { } foo(bar, "string", |s| s.len() == 5); - //~^ ERROR mismatched types - //~| ERROR mismatched types + //~^ ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough foo(baz, "string", |s| s.0.len() == 5); - //~^ ERROR mismatched types - //~| ERROR mismatched types + //~^ ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough } diff --git a/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.stderr b/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.stderr index 1cf364aa9f6..b2bb417a8f0 100644 --- a/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.stderr +++ b/tests/ui/higher-ranked/trait-bounds/normalize-under-binder/issue-71955.stderr @@ -1,79 +1,40 @@ -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-71955.rs:45:5 | LL | foo(bar, "string", |s| s.len() == 5); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | - = note: expected trait `for<'a, 'b> FnOnce(&'a &'b str)` - found trait `for<'a> FnOnce(&'a &str)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-71955.rs:45:24 - | -LL | foo(bar, "string", |s| s.len() == 5); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-71955.rs:25:9 - | -LL | F2: FnOnce(&<F1 as Parser>::Output) -> bool - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: closure with signature `for<'a> fn(&'a &'2 str) -> bool` must implement `FnOnce<(&&'1 str,)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&&'2 str,)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-71955.rs:45:5 | LL | foo(bar, "string", |s| s.len() == 5); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a &'b str)` - found trait `for<'a> FnOnce(&'a &str)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-71955.rs:45:24 - | -LL | foo(bar, "string", |s| s.len() == 5); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-71955.rs:25:44 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | F2: FnOnce(&<F1 as Parser>::Output) -> bool - | ^^^^ + = note: closure with signature `for<'a> fn(&'a &'2 str) -> bool` must implement `FnOnce<(&&'1 str,)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&&'2 str,)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-71955.rs:48:5 | LL | foo(baz, "string", |s| s.0.len() == 5); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | - = note: expected trait `for<'a, 'b> FnOnce(&'a Wrapper<'b>)` - found trait `for<'a> FnOnce(&'a Wrapper<'_>)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-71955.rs:48:24 - | -LL | foo(baz, "string", |s| s.0.len() == 5); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-71955.rs:25:9 - | -LL | F2: FnOnce(&<F1 as Parser>::Output) -> bool - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: closure with signature `for<'a> fn(&'a Wrapper<'2>) -> bool` must implement `FnOnce<(&Wrapper<'1>,)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&Wrapper<'2>,)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-71955.rs:48:5 | LL | foo(baz, "string", |s| s.0.len() == 5); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a Wrapper<'b>)` - found trait `for<'a> FnOnce(&'a Wrapper<'_>)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-71955.rs:48:24 - | -LL | foo(baz, "string", |s| s.0.len() == 5); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-71955.rs:25:44 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | F2: FnOnce(&<F1 as Parser>::Output) -> bool - | ^^^^ + = note: closure with signature `for<'a> fn(&'a Wrapper<'2>) -> bool` must implement `FnOnce<(&Wrapper<'1>,)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&Wrapper<'2>,)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 4 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/implied-bounds/gluon_salsa.rs b/tests/ui/implied-bounds/gluon_salsa.rs index 368fb197909..cc6352c4a32 100644 --- a/tests/ui/implied-bounds/gluon_salsa.rs +++ b/tests/ui/implied-bounds/gluon_salsa.rs @@ -1,5 +1,6 @@ //@ check-pass -// Found in a crater run on #118553 +// Related to Bevy regression #115559, found in +// a crater run on #118553. pub trait QueryBase { type Db; @@ -17,11 +18,17 @@ pub struct QueryTable<'me, Q, DB> { _marker: Option<&'me ()>, } -impl<'me, Q> QueryTable<'me, Q, <Q as QueryBase>::Db> // projection is important -// ^^^ removing 'me (and in QueryTable) gives a different error +impl<'me, Q> QueryTable<'me, Q, <Q as QueryBase>::Db> where Q: for<'f> AsyncQueryFunction<'f>, { + // When borrowchechking this function we normalize `<Q as QueryBase>::Db` in the + // function signature to `<Self as QueryFunction<'?x>>::SendDb`, where `'?x` is an + // unconstrained region variable. We then addd `<Self as QueryFunction<'?x>>::SendDb: 'a` + // as an implied bound. We currently a structural equality to decide whether this bound + // should be used to prove the bound `<Self as QueryFunction<'?x>>::SendDb: 'a`. For this + // to work we may have to structurally resolve regions as the actually used vars may + // otherwise be semantically equal but structurally different. pub fn get_async<'a>(&'a mut self) { panic!(); } diff --git a/tests/ui/lifetimes/issue-105675.rs b/tests/ui/lifetimes/issue-105675.rs index 58d8be8b65f..2e2eaca0d33 100644 --- a/tests/ui/lifetimes/issue-105675.rs +++ b/tests/ui/lifetimes/issue-105675.rs @@ -3,12 +3,12 @@ fn thing(x: impl FnOnce(&u32, &u32, u32)) {} fn main() { let f = | _ , y: &u32 , z | (); thing(f); - //~^ ERROR mismatched types - //~^^ ERROR mismatched types + //~^ ERROR implementation of `FnOnce` is not general enough + //~^^ ERROR implementation of `FnOnce` is not general enough let f = | x, y: _ , z: u32 | (); thing(f); - //~^ ERROR mismatched types - //~^^ ERROR mismatched types - //~^^^ ERROR implementation of `FnOnce` is not general enough - //~^^^^ ERROR implementation of `FnOnce` is not general enough + //~^ ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough } diff --git a/tests/ui/lifetimes/issue-105675.stderr b/tests/ui/lifetimes/issue-105675.stderr index f1fa5a59860..4b3d0e8ac5e 100644 --- a/tests/ui/lifetimes/issue-105675.stderr +++ b/tests/ui/lifetimes/issue-105675.stderr @@ -1,91 +1,39 @@ -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:5:5 | LL | thing(f); - | ^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a u32, &'b u32, u32)` - found trait `for<'a> FnOnce(&u32, &'a u32, u32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-105675.rs:4:13 - | -LL | let f = | _ , y: &u32 , z | (); - | ^^^^^^^^^^^^^^^^^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-105675.rs:1:18 - | -LL | fn thing(x: impl FnOnce(&u32, &u32, u32)) {} - | ^^^^^^^^^^^^^^^^^^^^^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let f = |_: &_, y: &u32, z| (); - | ~~~~~~~~~~~~~~~~~~~ + = note: closure with signature `for<'a> fn(&'2 u32, &'a u32, u32)` must implement `FnOnce<(&'1 u32, &u32, u32)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 u32, &u32, u32)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:5:5 | LL | thing(f); - | ^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a u32, &'b u32, u32)` - found trait `for<'a> FnOnce(&u32, &'a u32, u32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-105675.rs:4:13 - | -LL | let f = | _ , y: &u32 , z | (); - | ^^^^^^^^^^^^^^^^^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-105675.rs:1:18 + | ^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | fn thing(x: impl FnOnce(&u32, &u32, u32)) {} - | ^^^^^^^^^^^^^^^^^^^^^^^ + = note: closure with signature `for<'a> fn(&'2 u32, &'a u32, u32)` must implement `FnOnce<(&'1 u32, &u32, u32)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 u32, &u32, u32)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:9:5 | LL | thing(f); - | ^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a u32, &'b u32, u32)` - found trait `FnOnce(&u32, &u32, u32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-105675.rs:8:13 - | -LL | let f = | x, y: _ , z: u32 | (); - | ^^^^^^^^^^^^^^^^^^^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-105675.rs:1:18 - | -LL | fn thing(x: impl FnOnce(&u32, &u32, u32)) {} - | ^^^^^^^^^^^^^^^^^^^^^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let f = |x: &_, y: &_, z: u32| (); - | ~~~~~~~~~~~~~~~~~~~~~~ + = note: closure with signature `fn(&'2 u32, &u32, u32)` must implement `FnOnce<(&'1 u32, &u32, u32)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 u32, &u32, u32)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:9:5 | LL | thing(f); - | ^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a, 'b> FnOnce(&'a u32, &'b u32, u32)` - found trait `FnOnce(&u32, &u32, u32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-105675.rs:8:13 - | -LL | let f = | x, y: _ , z: u32 | (); - | ^^^^^^^^^^^^^^^^^^^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-105675.rs:1:18 - | -LL | fn thing(x: impl FnOnce(&u32, &u32, u32)) {} - | ^^^^^^^^^^^^^^^^^^^^^^^ - = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: consider specifying the type of the closure parameters + | ^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let f = |x: &_, y: &_, z: u32| (); - | ~~~~~~~~~~~~~~~~~~~~~~ + = note: closure with signature `fn(&u32, &'2 u32, u32)` must implement `FnOnce<(&u32, &'1 u32, u32)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&u32, &'2 u32, u32)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:9:5 @@ -95,6 +43,7 @@ LL | thing(f); | = note: closure with signature `fn(&'2 u32, &u32, u32)` must implement `FnOnce<(&'1 u32, &u32, u32)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 u32, &u32, u32)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: implementation of `FnOnce` is not general enough --> $DIR/issue-105675.rs:9:5 @@ -104,7 +53,7 @@ LL | thing(f); | = note: closure with signature `fn(&u32, &'2 u32, u32)` must implement `FnOnce<(&u32, &'1 u32, u32)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&u32, &'2 u32, u32)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 6 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/lifetimes/issue-79187-2.rs b/tests/ui/lifetimes/issue-79187-2.rs index fff92c30b37..9d7f17e7f23 100644 --- a/tests/ui/lifetimes/issue-79187-2.rs +++ b/tests/ui/lifetimes/issue-79187-2.rs @@ -7,7 +7,7 @@ fn take_foo(_: impl Foo) {} fn main() { take_foo(|a| a); //~^ ERROR implementation of `FnOnce` is not general enough - //~| ERROR mismatched types + //~| ERROR implementation of `Fn` is not general enough take_foo(|a: &i32| a); //~^ ERROR lifetime may not live long enough //~| ERROR mismatched types diff --git a/tests/ui/lifetimes/issue-79187-2.stderr b/tests/ui/lifetimes/issue-79187-2.stderr index e8115bb6b06..78f6ce882df 100644 --- a/tests/ui/lifetimes/issue-79187-2.stderr +++ b/tests/ui/lifetimes/issue-79187-2.stderr @@ -25,28 +25,14 @@ LL | take_foo(|a| a); = note: closure with signature `fn(&'2 i32) -> &i32` must implement `FnOnce<(&'1 i32,)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 i32,)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/issue-79187-2.rs:8:5 | LL | take_foo(|a| a); - | ^^^^^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a> Fn(&'a i32)` - found trait `Fn(&i32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-79187-2.rs:8:14 - | -LL | take_foo(|a| a); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-79187-2.rs:5:21 - | -LL | fn take_foo(_: impl Foo) {} - | ^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^^^^^^^^ implementation of `Fn` is not general enough | -LL | take_foo(|a: &_| a); - | ~~~~~~~ + = note: closure with signature `fn(&'2 i32) -> &i32` must implement `Fn<(&'1 i32,)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&'2 i32,)>`, for some specific lifetime `'2` error[E0308]: mismatched types --> $DIR/issue-79187-2.rs:11:5 diff --git a/tests/ui/lifetimes/issue-79187.rs b/tests/ui/lifetimes/issue-79187.rs index 8e13045623b..a8829bd4e49 100644 --- a/tests/ui/lifetimes/issue-79187.rs +++ b/tests/ui/lifetimes/issue-79187.rs @@ -3,6 +3,6 @@ fn thing(x: impl FnOnce(&u32)) {} fn main() { let f = |_| (); thing(f); - //~^ ERROR mismatched types - //~^^ ERROR implementation of `FnOnce` is not general enough + //~^ ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough } diff --git a/tests/ui/lifetimes/issue-79187.stderr b/tests/ui/lifetimes/issue-79187.stderr index 14bdfe75c08..8adde8d6dfb 100644 --- a/tests/ui/lifetimes/issue-79187.stderr +++ b/tests/ui/lifetimes/issue-79187.stderr @@ -1,25 +1,11 @@ -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/issue-79187.rs:5:5 | LL | thing(f); - | ^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a> FnOnce(&'a u32)` - found trait `FnOnce(&u32)` -note: this closure does not fulfill the lifetime requirements - --> $DIR/issue-79187.rs:4:13 - | -LL | let f = |_| (); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/issue-79187.rs:1:18 - | -LL | fn thing(x: impl FnOnce(&u32)) {} - | ^^^^^^^^^^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let f = |_: &_| (); - | ~~~~~~~ + = note: closure with signature `fn(&'2 u32)` must implement `FnOnce<(&'1 u32,)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 u32,)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/issue-79187.rs:5:5 @@ -29,7 +15,7 @@ LL | thing(f); | = note: closure with signature `fn(&'2 u32)` must implement `FnOnce<(&'1 u32,)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 u32,)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 2 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/lifetimes/lifetime-errors/issue_74400.rs b/tests/ui/lifetimes/lifetime-errors/issue_74400.rs index f17e0a678c9..b02e38bec3b 100644 --- a/tests/ui/lifetimes/lifetime-errors/issue_74400.rs +++ b/tests/ui/lifetimes/lifetime-errors/issue_74400.rs @@ -13,6 +13,6 @@ fn g<T>(data: &[T]) { //~^ ERROR the parameter type //~| ERROR the parameter type //~| ERROR the parameter type - //~| ERROR mismatched types //~| ERROR implementation of `FnOnce` is not general + //~| ERROR implementation of `Fn` is not general enough } diff --git a/tests/ui/lifetimes/lifetime-errors/issue_74400.stderr b/tests/ui/lifetimes/lifetime-errors/issue_74400.stderr index beb838d2ff8..4dada6ff014 100644 --- a/tests/ui/lifetimes/lifetime-errors/issue_74400.stderr +++ b/tests/ui/lifetimes/lifetime-errors/issue_74400.stderr @@ -42,19 +42,14 @@ help: consider adding an explicit lifetime bound LL | fn g<T: 'static>(data: &[T]) { | +++++++++ -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/issue_74400.rs:12:5 | LL | f(data, identity) - | ^^^^^^^^^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^^^^^^^^^ implementation of `Fn` is not general enough | - = note: expected trait `for<'a> Fn(&'a T)` - found trait `Fn(&T)` -note: the lifetime requirement is introduced here - --> $DIR/issue_74400.rs:8:34 - | -LL | fn f<T, S>(data: &[T], key: impl Fn(&T) -> S) { - | ^^^^^^^^^^^ + = note: `fn(&'2 T) -> &'2 T {identity::<&'2 T>}` must implement `Fn<(&'1 T,)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&'2 T,)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/issue_74400.rs:12:5 @@ -67,5 +62,4 @@ LL | f(data, identity) error: aborting due to 5 previous errors -Some errors have detailed explanations: E0308, E0310. -For more information about an error, try `rustc --explain E0308`. +For more information about this error, try `rustc --explain E0310`. diff --git a/tests/ui/mismatched_types/closure-arg-type-mismatch-issue-45727.stderr b/tests/ui/mismatched_types/closure-arg-type-mismatch-issue-45727.stderr index 452cba6b4de..e52e095e9f7 100644 --- a/tests/ui/mismatched_types/closure-arg-type-mismatch-issue-45727.stderr +++ b/tests/ui/mismatched_types/closure-arg-type-mismatch-issue-45727.stderr @@ -24,7 +24,7 @@ LL | let _ = (-10..=10).find(|x: &&&i32| x.signum() == 0); | expected due to this | = note: expected closure signature `for<'a> fn(&'a {integer}) -> _` - found closure signature `for<'a, 'b, 'c> fn(&'a &'b &'c i32) -> _` + found closure signature `fn(&&&i32) -> _` note: required by a bound in `find` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL help: consider adjusting the signature so it does not borrow its argument diff --git a/tests/ui/mismatched_types/closure-arg-type-mismatch.rs b/tests/ui/mismatched_types/closure-arg-type-mismatch.rs index e73a33dfded..55a4a0b5707 100644 --- a/tests/ui/mismatched_types/closure-arg-type-mismatch.rs +++ b/tests/ui/mismatched_types/closure-arg-type-mismatch.rs @@ -8,7 +8,7 @@ fn main() { fn baz<F: Fn(*mut &u32)>(_: F) {} fn _test<'a>(f: fn(*mut &'a u32)) { baz(f); - //~^ ERROR: mismatched types + //~^ ERROR: implementation of `FnOnce` is not general enough //~| ERROR: borrowed data escapes //~| ERROR: not general enough } diff --git a/tests/ui/mismatched_types/closure-arg-type-mismatch.stderr b/tests/ui/mismatched_types/closure-arg-type-mismatch.stderr index e63d3f6a075..abc5d150a3f 100644 --- a/tests/ui/mismatched_types/closure-arg-type-mismatch.stderr +++ b/tests/ui/mismatched_types/closure-arg-type-mismatch.stderr @@ -24,7 +24,7 @@ LL | a.iter().map(|_: &(u16, u16)| 45); | expected due to this | = note: expected closure signature `fn(&(u32, u32)) -> _` - found closure signature `for<'a> fn(&'a (u16, u16)) -> _` + found closure signature `fn(&(u16, u16)) -> _` note: required by a bound in `map` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL @@ -63,19 +63,14 @@ note: due to current limitations in the borrow checker, this implies a `'static` LL | fn baz<F: Fn(*mut &u32)>(_: F) {} | ^^^^^^^^^^^^^ -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/closure-arg-type-mismatch.rs:10:5 | LL | baz(f); - | ^^^^^^ one type is more general than the other + | ^^^^^^ implementation of `Fn` is not general enough | - = note: expected trait `for<'a> Fn(*mut &'a u32)` - found trait `Fn(*mut &u32)` -note: the lifetime requirement is introduced here - --> $DIR/closure-arg-type-mismatch.rs:8:11 - | -LL | fn baz<F: Fn(*mut &u32)>(_: F) {} - | ^^^^^^^^^^^^^ + = note: `fn(*mut &'2 u32)` must implement `Fn<(*mut &'1 u32,)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(*mut &'2 u32,)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/closure-arg-type-mismatch.rs:10:5 @@ -88,5 +83,5 @@ LL | baz(f); error: aborting due to 6 previous errors -Some errors have detailed explanations: E0308, E0521, E0631. -For more information about an error, try `rustc --explain E0308`. +Some errors have detailed explanations: E0521, E0631. +For more information about an error, try `rustc --explain E0521`. diff --git a/tests/ui/mismatched_types/closure-mismatch.rs b/tests/ui/mismatched_types/closure-mismatch.rs index 4eb33497c39..efaed4dc1b9 100644 --- a/tests/ui/mismatched_types/closure-mismatch.rs +++ b/tests/ui/mismatched_types/closure-mismatch.rs @@ -7,8 +7,8 @@ fn baz<T: Foo>(_: T) {} fn main() { baz(|_| ()); //~^ ERROR implementation of `FnOnce` is not general enough - //~| ERROR mismatched types + //~| ERROR implementation of `Fn` is not general enough baz(|x| ()); //~^ ERROR implementation of `FnOnce` is not general enough - //~| ERROR mismatched types + //~| ERROR implementation of `Fn` is not general enough } diff --git a/tests/ui/mismatched_types/closure-mismatch.stderr b/tests/ui/mismatched_types/closure-mismatch.stderr index 74033c18573..802110c6511 100644 --- a/tests/ui/mismatched_types/closure-mismatch.stderr +++ b/tests/ui/mismatched_types/closure-mismatch.stderr @@ -7,28 +7,14 @@ LL | baz(|_| ()); = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/closure-mismatch.rs:8:5 | LL | baz(|_| ()); - | ^^^^^^^^^^^ one type is more general than the other + | ^^^^^^^^^^^ implementation of `Fn` is not general enough | - = note: expected trait `for<'a> Fn(&'a ())` - found trait `Fn(&())` -note: this closure does not fulfill the lifetime requirements - --> $DIR/closure-mismatch.rs:8:9 - | -LL | baz(|_| ()); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/closure-mismatch.rs:5:11 - | -LL | fn baz<T: Foo>(_: T) {} - | ^^^ -help: consider specifying the type of the closure parameters - | -LL | baz(|_: &_| ()); - | ~~~~~~~ + = note: closure with signature `fn(&'2 ())` must implement `Fn<(&'1 (),)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&'2 (),)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/closure-mismatch.rs:11:5 @@ -39,29 +25,14 @@ LL | baz(|x| ()); = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/closure-mismatch.rs:11:5 | LL | baz(|x| ()); - | ^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a> Fn(&'a ())` - found trait `Fn(&())` -note: this closure does not fulfill the lifetime requirements - --> $DIR/closure-mismatch.rs:11:9 - | -LL | baz(|x| ()); - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/closure-mismatch.rs:5:11 - | -LL | fn baz<T: Foo>(_: T) {} - | ^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^^^^ implementation of `Fn` is not general enough | -LL | baz(|x: &_| ()); - | ~~~~~~~ + = note: closure with signature `fn(&'2 ())` must implement `Fn<(&'1 (),)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&'2 (),)>`, for some specific lifetime `'2` error: aborting due to 4 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/mismatched_types/fn-variance-1.stderr b/tests/ui/mismatched_types/fn-variance-1.stderr index fdb2e6f0097..ed450d8d81c 100644 --- a/tests/ui/mismatched_types/fn-variance-1.stderr +++ b/tests/ui/mismatched_types/fn-variance-1.stderr @@ -10,7 +10,7 @@ LL | apply(&3, takes_mut); | required by a bound introduced by this call | = note: expected function signature `fn(&{integer}) -> _` - found function signature `for<'a> fn(&'a mut isize) -> _` + found function signature `fn(&mut isize) -> _` note: required by a bound in `apply` --> $DIR/fn-variance-1.rs:5:37 | @@ -33,7 +33,7 @@ LL | apply(&mut 3, takes_imm); | required by a bound introduced by this call | = note: expected function signature `fn(&mut {integer}) -> _` - found function signature `for<'a> fn(&'a isize) -> _` + found function signature `fn(&isize) -> _` note: required by a bound in `apply` --> $DIR/fn-variance-1.rs:5:37 | diff --git a/tests/ui/mismatched_types/issue-36053-2.stderr b/tests/ui/mismatched_types/issue-36053-2.stderr index 6d23319ca7e..ffaa276b62e 100644 --- a/tests/ui/mismatched_types/issue-36053-2.stderr +++ b/tests/ui/mismatched_types/issue-36053-2.stderr @@ -7,7 +7,7 @@ LL | once::<&str>("str").fuse().filter(|a: &str| true).count(); | expected due to this | = note: expected closure signature `for<'a> fn(&'a &_) -> _` - found closure signature `for<'a> fn(&'a _) -> _` + found closure signature `fn(&_) -> _` note: required by a bound in `filter` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL help: consider adjusting the signature so it borrows its argument diff --git a/tests/ui/mismatched_types/suggest-option-asderef-inference-var.stderr b/tests/ui/mismatched_types/suggest-option-asderef-inference-var.stderr index 0ed57466e9c..0b8943898f5 100644 --- a/tests/ui/mismatched_types/suggest-option-asderef-inference-var.stderr +++ b/tests/ui/mismatched_types/suggest-option-asderef-inference-var.stderr @@ -10,7 +10,7 @@ LL | let _has_inference_vars: Option<i32> = Some(0).map(deref_int); | required by a bound introduced by this call | = note: expected function signature `fn({integer}) -> _` - found function signature `for<'a> fn(&'a i32) -> _` + found function signature `fn(&i32) -> _` note: required by a bound in `Option::<T>::map` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure diff --git a/tests/ui/mismatched_types/suggest-option-asderef-unfixable.stderr b/tests/ui/mismatched_types/suggest-option-asderef-unfixable.stderr index 1ac057a5f38..99c9028ae1e 100644 --- a/tests/ui/mismatched_types/suggest-option-asderef-unfixable.stderr +++ b/tests/ui/mismatched_types/suggest-option-asderef-unfixable.stderr @@ -10,7 +10,7 @@ LL | let _ = produces_string().and_then(takes_str_but_too_many_refs); | required by a bound introduced by this call | = note: expected function signature `fn(String) -> _` - found function signature `for<'a, 'b> fn(&'a &'b str) -> _` + found function signature `fn(&&str) -> _` note: required by a bound in `Option::<T>::and_then` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure @@ -69,7 +69,7 @@ LL | let _ = Some(TypeWithoutDeref).and_then(takes_str_but_too_many_refs); | required by a bound introduced by this call | = note: expected function signature `fn(TypeWithoutDeref) -> _` - found function signature `for<'a, 'b> fn(&'a &'b str) -> _` + found function signature `fn(&&str) -> _` note: required by a bound in `Option::<T>::and_then` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure diff --git a/tests/ui/mismatched_types/suggest-option-asderef.stderr b/tests/ui/mismatched_types/suggest-option-asderef.stderr index 1702a7f1dec..306c412e9d2 100644 --- a/tests/ui/mismatched_types/suggest-option-asderef.stderr +++ b/tests/ui/mismatched_types/suggest-option-asderef.stderr @@ -10,7 +10,7 @@ LL | let _: Option<()> = produces_string().and_then(takes_str); | required by a bound introduced by this call | = note: expected function signature `fn(String) -> _` - found function signature `for<'a> fn(&'a str) -> _` + found function signature `fn(&str) -> _` note: required by a bound in `Option::<T>::and_then` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure @@ -34,7 +34,7 @@ LL | let _: Option<Option<()>> = produces_string().map(takes_str); | required by a bound introduced by this call | = note: expected function signature `fn(String) -> _` - found function signature `for<'a> fn(&'a str) -> _` + found function signature `fn(&str) -> _` note: required by a bound in `Option::<T>::map` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure @@ -58,7 +58,7 @@ LL | let _: Option<Option<()>> = produces_string().map(takes_str_mut); | required by a bound introduced by this call | = note: expected function signature `fn(String) -> _` - found function signature `for<'a> fn(&'a mut str) -> _` + found function signature `fn(&mut str) -> _` note: required by a bound in `Option::<T>::map` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure @@ -82,7 +82,7 @@ LL | let _ = produces_string().and_then(generic_ref); | required by a bound introduced by this call | = note: expected function signature `fn(String) -> _` - found function signature `for<'a> fn(&'a _) -> _` + found function signature `fn(&_) -> _` note: required by a bound in `Option::<T>::and_then` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure diff --git a/tests/ui/nll/missing-universe-cause-issue-114907.rs b/tests/ui/nll/missing-universe-cause-issue-114907.rs index 9c69c6bdc36..a3eb5fceea9 100644 --- a/tests/ui/nll/missing-universe-cause-issue-114907.rs +++ b/tests/ui/nll/missing-universe-cause-issue-114907.rs @@ -31,8 +31,8 @@ fn accept<C: FnOnce(&())>(_: C) -> Handshake<HandshakeCallback<C>> { fn main() { let callback = |_| {}; accept(callback); - //~^ ERROR mismatched types - //~| ERROR mismatched types + //~^ ERROR implementation of `FnOnce` is not general enough + //~| ERROR implementation of `FnOnce` is not general enough //~| ERROR implementation of `FnOnce` is not general enough //~| ERROR implementation of `FnOnce` is not general enough //~| ERROR higher-ranked subtype error diff --git a/tests/ui/nll/missing-universe-cause-issue-114907.stderr b/tests/ui/nll/missing-universe-cause-issue-114907.stderr index a616d29c4fe..26ad1efec05 100644 --- a/tests/ui/nll/missing-universe-cause-issue-114907.stderr +++ b/tests/ui/nll/missing-universe-cause-issue-114907.stderr @@ -1,25 +1,11 @@ -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/missing-universe-cause-issue-114907.rs:33:5 | LL | accept(callback); - | ^^^^^^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a> FnOnce(&'a ())` - found trait `FnOnce(&())` -note: this closure does not fulfill the lifetime requirements - --> $DIR/missing-universe-cause-issue-114907.rs:32:20 - | -LL | let callback = |_| {}; - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/missing-universe-cause-issue-114907.rs:27:14 - | -LL | fn accept<C: FnOnce(&())>(_: C) -> Handshake<HandshakeCallback<C>> { - | ^^^^^^^^^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let callback = |_: &_| {}; - | ~~~~~~~ + = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/missing-universe-cause-issue-114907.rs:33:5 @@ -29,6 +15,7 @@ LL | accept(callback); | = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`... = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: implementation of `FnOnce` is not general enough --> $DIR/missing-universe-cause-issue-114907.rs:33:5 @@ -40,28 +27,15 @@ LL | accept(callback); = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -error[E0308]: mismatched types +error: implementation of `FnOnce` is not general enough --> $DIR/missing-universe-cause-issue-114907.rs:33:5 | LL | accept(callback); - | ^^^^^^^^^^^^^^^^ one type is more general than the other - | - = note: expected trait `for<'a> FnOnce(&'a ())` - found trait `FnOnce(&())` -note: this closure does not fulfill the lifetime requirements - --> $DIR/missing-universe-cause-issue-114907.rs:32:20 - | -LL | let callback = |_| {}; - | ^^^ -note: the lifetime requirement is introduced here - --> $DIR/missing-universe-cause-issue-114907.rs:20:21 - | -LL | struct Handshake<R: Role> { - | ^^^^ -help: consider specifying the type of the closure parameters + | ^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough | -LL | let callback = |_: &_| {}; - | ~~~~~~~ + = note: closure with signature `fn(&'2 ())` must implement `FnOnce<(&'1 (),)>`, for any lifetime `'1`... + = note: ...but it actually implements `FnOnce<(&'2 (),)>`, for some specific lifetime `'2` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: higher-ranked subtype error --> $DIR/missing-universe-cause-issue-114907.rs:33:21 @@ -79,4 +53,3 @@ LL | accept(callback); error: aborting due to 6 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.rs b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.rs index c0e13a5f5f0..5d11941414f 100644 --- a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.rs +++ b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.rs @@ -26,8 +26,8 @@ static SOME_STRUCT: &SomeStruct = &SomeStruct { foo: &Foo { bools: &[false, true] }, bar: &Bar { bools: &[true, true] }, f: &id, - //~^ ERROR mismatched types - //~| ERROR mismatched types + //~^ ERROR implementation of `Fn` is not general enough + //~| ERROR implementation of `Fn` is not general enough //~| ERROR implementation of `FnOnce` is not general enough //~| ERROR implementation of `FnOnce` is not general enough }; diff --git a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr index 52c700c326e..5c98a9d4fb4 100644 --- a/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr +++ b/tests/ui/rfcs/rfc-1623-static/rfc1623-2.stderr @@ -1,21 +1,20 @@ -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/rfc1623-2.rs:28:8 | LL | f: &id, - | ^^^ one type is more general than the other + | ^^^ implementation of `Fn` is not general enough | - = note: expected trait `for<'a, 'b> Fn(&'a Foo<'b>)` - found trait `Fn(&Foo<'_>)` + = note: `fn(&'2 Foo<'_>) -> &'2 Foo<'_> {id::<&'2 Foo<'_>>}` must implement `Fn<(&'1 Foo<'b>,)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&'2 Foo<'_>,)>`, for some specific lifetime `'2` -error[E0308]: mismatched types +error: implementation of `Fn` is not general enough --> $DIR/rfc1623-2.rs:28:8 | LL | f: &id, - | ^^^ one type is more general than the other + | ^^^ implementation of `Fn` is not general enough | - = note: expected trait `for<'a, 'b> Fn(&'a Foo<'b>)` - found trait `Fn(&Foo<'_>)` - = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + = note: `fn(&Foo<'2>) -> &Foo<'2> {id::<&Foo<'2>>}` must implement `Fn<(&'a Foo<'1>,)>`, for any lifetime `'1`... + = note: ...but it actually implements `Fn<(&Foo<'2>,)>`, for some specific lifetime `'2` error: implementation of `FnOnce` is not general enough --> $DIR/rfc1623-2.rs:28:8 @@ -37,4 +36,3 @@ LL | f: &id, error: aborting due to 4 previous errors -For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/suggestions/late-bound-in-borrow-closure-sugg.stderr b/tests/ui/suggestions/late-bound-in-borrow-closure-sugg.stderr index ee924522564..f0acf1dbb96 100644 --- a/tests/ui/suggestions/late-bound-in-borrow-closure-sugg.stderr +++ b/tests/ui/suggestions/late-bound-in-borrow-closure-sugg.stderr @@ -10,7 +10,7 @@ LL | trader.set_closure(closure); | required by a bound introduced by this call | = note: expected closure signature `for<'a, 'b> fn(&'a mut Trader<'b>) -> _` - found closure signature `for<'a> fn(Trader<'a>) -> _` + found closure signature `fn(Trader<'_>) -> _` note: required by a bound in `Trader::<'a>::set_closure` --> $DIR/late-bound-in-borrow-closure-sugg.rs:15:50 | diff --git a/tests/ui/typeck/mismatched-map-under-self.stderr b/tests/ui/typeck/mismatched-map-under-self.stderr index 13678b4b827..322bf349f92 100644 --- a/tests/ui/typeck/mismatched-map-under-self.stderr +++ b/tests/ui/typeck/mismatched-map-under-self.stderr @@ -27,7 +27,7 @@ LL | self.map(Insertable::values).unwrap_or_default() | required by a bound introduced by this call | = note: expected function signature `fn(T) -> _` - found function signature `for<'a> fn(&'a _) -> _` + found function signature `fn(&_) -> _` note: required by a bound in `Option::<T>::map` --> $SRC_DIR/core/src/option.rs:LL:COL help: consider wrapping the function in a closure |