diff options
Diffstat (limited to 'src/test/ui/generic-associated-types/bugs')
28 files changed, 223 insertions, 75 deletions
diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.rs b/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.rs new file mode 100644 index 000000000..719d1bd5a --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.rs @@ -0,0 +1,35 @@ +// check-fail +// known-bug + +// This gives us problems because `for<'a> I::Item<'a>: Debug` should mean "for +// all 'a where I::Item<'a> is WF", but really means "for all 'a possible" + +use std::fmt::Debug; + +pub trait LendingIterator { + type Item<'this> + where + Self: 'this; +} + +pub struct WindowsMut<'x> { + slice: &'x (), +} + +impl<'y> LendingIterator for WindowsMut<'y> { + type Item<'this> = &'this mut () where 'y: 'this; +} + +fn print_items<I>(_iter: I) +where + I: LendingIterator, + for<'a> I::Item<'a>: Debug, +{ +} + +fn main() { + let slice = &mut (); + //~^ temporary value dropped while borrowed + let windows = WindowsMut { slice }; + print_items::<WindowsMut<'_>>(windows); +} diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.stderr b/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.stderr new file mode 100644 index 000000000..414999881 --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-1.stderr @@ -0,0 +1,20 @@ +error[E0716]: temporary value dropped while borrowed + --> $DIR/hrtb-implied-1.rs:31:22 + | +LL | let slice = &mut (); + | ^^ creates a temporary which is freed while still in use +... +LL | print_items::<WindowsMut<'_>>(windows); + | -------------------------------------- argument requires that borrow lasts for `'static` +LL | } + | - temporary value is freed at the end of this statement + | +note: due to current limitations in the borrow checker, this implies a `'static` lifetime + --> $DIR/hrtb-implied-1.rs:26:26 + | +LL | for<'a> I::Item<'a>: Debug, + | ^^^^^ + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0716`. diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.rs b/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.rs new file mode 100644 index 000000000..8e6c5348e --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.rs @@ -0,0 +1,40 @@ +// check-fail +// known-bug + +// This gives us problems because `for<'a> I::Item<'a>: Debug` should mean "for +// all 'a where I::Item<'a> is WF", but really means "for all 'a possible" + +trait LendingIterator: Sized { + type Item<'a> + where + Self: 'a; + fn next(&mut self) -> Self::Item<'_>; +} +fn fails<I: LendingIterator, F>(iter: &mut I, f: F) -> bool +where + F: FnMut(I::Item<'_>), +{ + let mut iter2 = Eat(iter, f); + let _next = iter2.next(); + //~^ borrowed data escapes + true +} +impl<I: LendingIterator> LendingIterator for &mut I { + type Item<'a> = I::Item<'a> where Self:'a; + fn next(&mut self) -> Self::Item<'_> { + (**self).next() + } +} + +struct Eat<I, F>(I, F); +impl<I: LendingIterator, F> Iterator for Eat<I, F> +where + F: FnMut(I::Item<'_>), +{ + type Item = (); + fn next(&mut self) -> Option<Self::Item> { + None + } +} + +fn main() {} diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.stderr b/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.stderr new file mode 100644 index 000000000..1ee270398 --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-2.stderr @@ -0,0 +1,22 @@ +error[E0521]: borrowed data escapes outside of function + --> $DIR/hrtb-implied-2.rs:18:17 + | +LL | fn fails<I: LendingIterator, F>(iter: &mut I, f: F) -> bool + | ---- - let's call the lifetime of this reference `'1` + | | + | `iter` is a reference that is only valid in the function body +... +LL | let _next = iter2.next(); + | ^^^^^^^^^^^^ + | | + | `iter` escapes the function body here + | argument requires that `'1` must outlive `'static` + | + = note: requirement occurs because of a mutable reference to `Eat<&mut I, F>` + = note: mutable references are invariant over their type parameter + = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance + = note: due to current limitations in the borrow checker, this implies a `'static` lifetime + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0521`. diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.rs b/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.rs new file mode 100644 index 000000000..bc9e6c8ae --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.rs @@ -0,0 +1,23 @@ +trait LendingIterator { + type Item<'a> + where + Self: 'a; +} + +impl LendingIterator for &str { + type Item<'a> = () where Self:'a; +} + +fn trivial_bound<I>(_: I) +where + I: LendingIterator, + for<'a> I::Item<'a>: Sized, +{ +} + +fn fails(iter: &str) { + trivial_bound(iter); + //~^ borrowed data escapes +} + +fn main() {} diff --git a/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.stderr b/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.stderr new file mode 100644 index 000000000..c67e02437 --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/hrtb-implied-3.stderr @@ -0,0 +1,22 @@ +error[E0521]: borrowed data escapes outside of function + --> $DIR/hrtb-implied-3.rs:19:5 + | +LL | fn fails(iter: &str) { + | ---- - let's call the lifetime of this reference `'1` + | | + | `iter` is a reference that is only valid in the function body +LL | trivial_bound(iter); + | ^^^^^^^^^^^^^^^^^^^ + | | + | `iter` escapes the function body here + | argument requires that `'1` must outlive `'static` + | +note: due to current limitations in the borrow checker, this implies a `'static` lifetime + --> $DIR/hrtb-implied-3.rs:14:26 + | +LL | for<'a> I::Item<'a>: Sized, + | ^^^^^ + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0521`. diff --git a/src/test/ui/generic-associated-types/bugs/issue-80626.rs b/src/test/ui/generic-associated-types/bugs/issue-80626.rs index 14f27aff1..f6aa6b36e 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-80626.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-80626.rs @@ -3,8 +3,6 @@ // This should pass, but it requires `Sized` to be coinductive. -#![feature(generic_associated_types)] - trait Allocator { type Allocated<T>; } diff --git a/src/test/ui/generic-associated-types/bugs/issue-80626.stderr b/src/test/ui/generic-associated-types/bugs/issue-80626.stderr index 487b83dfa..9a0f332ed 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-80626.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-80626.stderr @@ -1,11 +1,11 @@ error[E0275]: overflow evaluating the requirement `LinkedList<A>: Sized` - --> $DIR/issue-80626.rs:14:10 + --> $DIR/issue-80626.rs:12:10 | LL | Next(A::Allocated<Self>) | ^^^^^^^^^^^^^^^^^^ | note: required by a bound in `Allocator::Allocated` - --> $DIR/issue-80626.rs:9:20 + --> $DIR/issue-80626.rs:7:20 | LL | type Allocated<T>; | ^ required by this bound in `Allocator::Allocated` diff --git a/src/test/ui/generic-associated-types/bugs/issue-86218.rs b/src/test/ui/generic-associated-types/bugs/issue-86218.rs index fb62c10a9..3a2d758e7 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-86218.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-86218.rs @@ -3,7 +3,6 @@ // This should pass, but seems to run into a TAIT issue. -#![feature(generic_associated_types)] #![feature(type_alias_impl_trait)] pub trait Stream { diff --git a/src/test/ui/generic-associated-types/bugs/issue-86218.stderr b/src/test/ui/generic-associated-types/bugs/issue-86218.stderr index fbf1c8f95..de1b464a4 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-86218.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-86218.stderr @@ -1,17 +1,17 @@ error[E0477]: the type `<() as Yay<&'a ()>>::InnerStream<'s>` does not fulfill the required lifetime - --> $DIR/issue-86218.rs:23:28 + --> $DIR/issue-86218.rs:22:28 | LL | type InnerStream<'s> = impl Stream<Item = i32> + 's; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: type must outlive the lifetime `'s` as defined here as required by this binding - --> $DIR/issue-86218.rs:23:22 + --> $DIR/issue-86218.rs:22:22 | LL | type InnerStream<'s> = impl Stream<Item = i32> + 's; | ^^ error: unconstrained opaque type - --> $DIR/issue-86218.rs:23:28 + --> $DIR/issue-86218.rs:22:28 | LL | type InnerStream<'s> = impl Stream<Item = i32> + 's; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/src/test/ui/generic-associated-types/bugs/issue-87735.rs b/src/test/ui/generic-associated-types/bugs/issue-87735.rs index 0844d84c3..80737a798 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87735.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-87735.rs @@ -3,8 +3,6 @@ // This should pass, but we need an extension of implied bounds (probably). -#![feature(generic_associated_types)] - pub trait AsRef2 { type Output<'a> where Self: 'a; diff --git a/src/test/ui/generic-associated-types/bugs/issue-87735.stderr b/src/test/ui/generic-associated-types/bugs/issue-87735.stderr index 0a18b5f0c..ebe2054ce 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87735.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-87735.stderr @@ -1,5 +1,5 @@ error[E0207]: the type parameter `U` is not constrained by the impl trait, self type, or predicates - --> $DIR/issue-87735.rs:27:13 + --> $DIR/issue-87735.rs:25:13 | LL | impl<'b, T, U> AsRef2 for Foo<T> | ^ unconstrained type parameter diff --git a/src/test/ui/generic-associated-types/bugs/issue-87748.rs b/src/test/ui/generic-associated-types/bugs/issue-87748.rs deleted file mode 100644 index a3d00ee03..000000000 --- a/src/test/ui/generic-associated-types/bugs/issue-87748.rs +++ /dev/null @@ -1,23 +0,0 @@ -// check-fail -// known-bug: #87748 - -// This should pass, but unnormalized input args aren't treated as implied. - -#![feature(generic_associated_types)] - -trait MyTrait { - type Assoc<'a, 'b> where 'b: 'a; - fn do_sth(arg: Self::Assoc<'_, '_>); -} - -struct Foo; - -impl MyTrait for Foo { - type Assoc<'a, 'b> = u32 where 'b: 'a; - - fn do_sth(_: u32) {} - // fn do_sth(_: Self::Assoc<'static, 'static>) {} - // fn do_sth(_: Self::Assoc<'_, '_>) {} -} - -fn main() {} diff --git a/src/test/ui/generic-associated-types/bugs/issue-87748.stderr b/src/test/ui/generic-associated-types/bugs/issue-87748.stderr deleted file mode 100644 index ac197dfe6..000000000 --- a/src/test/ui/generic-associated-types/bugs/issue-87748.stderr +++ /dev/null @@ -1,20 +0,0 @@ -error[E0478]: lifetime bound not satisfied - --> $DIR/issue-87748.rs:18:5 - | -LL | fn do_sth(_: u32) {} - | ^^^^^^^^^^^^^^^^^ - | -note: lifetime parameter instantiated with the anonymous lifetime as defined here - --> $DIR/issue-87748.rs:18:5 - | -LL | fn do_sth(_: u32) {} - | ^^^^^^^^^^^^^^^^^ -note: but lifetime parameter must outlive the anonymous lifetime as defined here - --> $DIR/issue-87748.rs:18:5 - | -LL | fn do_sth(_: u32) {} - | ^^^^^^^^^^^^^^^^^ - -error: aborting due to previous error - -For more information about this error, try `rustc --explain E0478`. diff --git a/src/test/ui/generic-associated-types/bugs/issue-87755.rs b/src/test/ui/generic-associated-types/bugs/issue-87755.rs index efa487d62..cda722d2f 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87755.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-87755.rs @@ -3,8 +3,6 @@ // This should pass. -#![feature(generic_associated_types)] - use std::fmt::Debug; trait Foo { diff --git a/src/test/ui/generic-associated-types/bugs/issue-87755.stderr b/src/test/ui/generic-associated-types/bugs/issue-87755.stderr index 5d1aff011..5e94db9b0 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87755.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-87755.stderr @@ -1,5 +1,5 @@ error[E0275]: overflow evaluating the requirement `<Bar as Foo>::Ass == _` - --> $DIR/issue-87755.rs:18:16 + --> $DIR/issue-87755.rs:16:16 | LL | type Ass = Bar; | ^^^ diff --git a/src/test/ui/generic-associated-types/bugs/issue-87803.rs b/src/test/ui/generic-associated-types/bugs/issue-87803.rs index a8a111c99..56237e387 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87803.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-87803.rs @@ -4,8 +4,6 @@ // This should pass, but using a type alias vs a reference directly // changes late-bound -> early-bound. -#![feature(generic_associated_types)] - trait Scanner { type Input<'a>; type Token<'a>; diff --git a/src/test/ui/generic-associated-types/bugs/issue-87803.stderr b/src/test/ui/generic-associated-types/bugs/issue-87803.stderr index c81c051d3..fe2abdedb 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-87803.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-87803.stderr @@ -1,5 +1,5 @@ error[E0195]: lifetime parameters or bounds on method `scan` do not match the trait declaration - --> $DIR/issue-87803.rs:22:12 + --> $DIR/issue-87803.rs:20:12 | LL | fn scan<'a>(&mut self, i : Self::Input<'a>) -> Self::Token<'a>; | ---- lifetimes in impl do not match this method in trait diff --git a/src/test/ui/generic-associated-types/bugs/issue-88382.rs b/src/test/ui/generic-associated-types/bugs/issue-88382.rs index 5493b9b93..8f8cc4523 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88382.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-88382.rs @@ -3,8 +3,6 @@ // This should pass, but has a missed normalization due to HRTB. -#![feature(generic_associated_types)] - trait Iterable { type Iterator<'a> where Self: 'a; fn iter(&self) -> Self::Iterator<'_>; diff --git a/src/test/ui/generic-associated-types/bugs/issue-88382.stderr b/src/test/ui/generic-associated-types/bugs/issue-88382.stderr index 7210895b7..c5fd58096 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88382.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-88382.stderr @@ -1,5 +1,5 @@ error[E0631]: type mismatch in function arguments - --> $DIR/issue-88382.rs:28:40 + --> $DIR/issue-88382.rs:26:40 | LL | do_something(SomeImplementation(), test); | ------------ ^^^^ expected due to this @@ -12,7 +12,7 @@ LL | fn test<'a, I: Iterable>(_: &mut I::Iterator<'a>) {} = note: expected function signature `for<'r> fn(&'r mut std::iter::Empty<usize>) -> _` found function signature `for<'a, 'r> fn(&'r mut <_ as Iterable>::Iterator<'a>) -> _` note: required by a bound in `do_something` - --> $DIR/issue-88382.rs:22:48 + --> $DIR/issue-88382.rs:20:48 | 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` diff --git a/src/test/ui/generic-associated-types/bugs/issue-88460.rs b/src/test/ui/generic-associated-types/bugs/issue-88460.rs index f1c3b2269..224e696ad 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88460.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-88460.rs @@ -3,8 +3,6 @@ // This should pass, but has a missed normalization due to HRTB. -#![feature(generic_associated_types)] - pub trait Marker {} pub trait Trait { diff --git a/src/test/ui/generic-associated-types/bugs/issue-88460.stderr b/src/test/ui/generic-associated-types/bugs/issue-88460.stderr index 98c304cc9..6612c4b49 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88460.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-88460.stderr @@ -1,12 +1,14 @@ error[E0277]: the trait bound `for<'a> <_ as Trait>::Assoc<'a>: Marker` is not satisfied - --> $DIR/issue-88460.rs:30:5 + --> $DIR/issue-88460.rs:28:10 | LL | test(Foo); - | ^^^^ the trait `for<'a> Marker` is not implemented for `<_ as Trait>::Assoc<'a>` + | ---- ^^^ the trait `for<'a> Marker` is not implemented for `<_ as Trait>::Assoc<'a>` + | | + | required by a bound introduced by this call | = help: the trait `Marker` is implemented for `()` note: required by a bound in `test` - --> $DIR/issue-88460.rs:17:27 + --> $DIR/issue-88460.rs:15:27 | LL | fn test<T>(value: T) | ---- required by a bound in this diff --git a/src/test/ui/generic-associated-types/bugs/issue-88526.rs b/src/test/ui/generic-associated-types/bugs/issue-88526.rs index 15363ad04..99397744f 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88526.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-88526.rs @@ -3,8 +3,6 @@ // This should pass, but requires more logic. -#![feature(generic_associated_types)] - trait A { type I<'a>; } diff --git a/src/test/ui/generic-associated-types/bugs/issue-88526.stderr b/src/test/ui/generic-associated-types/bugs/issue-88526.stderr index 127c889bf..56857c655 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-88526.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-88526.stderr @@ -1,5 +1,5 @@ error[E0207]: the type parameter `I` is not constrained by the impl trait, self type, or predicates - --> $DIR/issue-88526.rs:27:13 + --> $DIR/issue-88526.rs:25:13 | LL | impl<'q, Q, I, F> A for TestB<Q, F> | ^ unconstrained type parameter diff --git a/src/test/ui/generic-associated-types/bugs/issue-89008.rs b/src/test/ui/generic-associated-types/bugs/issue-89008.rs index 79c28b0d2..012aa8df2 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-89008.rs +++ b/src/test/ui/generic-associated-types/bugs/issue-89008.rs @@ -5,7 +5,6 @@ // This should pass, but seems to run into a TAIT bug. #![feature(type_alias_impl_trait)] -#![feature(generic_associated_types)] use std::future::Future; diff --git a/src/test/ui/generic-associated-types/bugs/issue-89008.stderr b/src/test/ui/generic-associated-types/bugs/issue-89008.stderr index 50844fdc1..3f72734ef 100644 --- a/src/test/ui/generic-associated-types/bugs/issue-89008.stderr +++ b/src/test/ui/generic-associated-types/bugs/issue-89008.stderr @@ -1,5 +1,5 @@ error[E0271]: type mismatch resolving `<Empty<_> as Stream>::Item == Repr` - --> $DIR/issue-89008.rs:39:43 + --> $DIR/issue-89008.rs:38:43 | LL | fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> { | ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `<Empty<_> as Stream>::Item == Repr` @@ -7,7 +7,7 @@ LL | fn line_stream<'a, Repr>(&'a self) -> Self::LineStreamFut<'a, Repr> { | this type parameter | note: expected this to be `()` - --> $DIR/issue-89008.rs:18:17 + --> $DIR/issue-89008.rs:17:17 | LL | type Item = (); | ^^ diff --git a/src/test/ui/generic-associated-types/bugs/issue-91762.rs b/src/test/ui/generic-associated-types/bugs/issue-91762.rs new file mode 100644 index 000000000..796935cc0 --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/issue-91762.rs @@ -0,0 +1,29 @@ +// check-fail +// known-bug + +// We almost certaintly want this to pass, but +// it's particularly difficult currently, because we need a way of specifying +// that `<Self::Base as Functor>::With<T> = Self` without using that when we have +// a `U`. See `https://github.com/rust-lang/rust/pull/92728` for a (hacky) +// solution. This might be better to just wait for Chalk. + +pub trait Functor { + type With<T>; + + fn fmap<T, U>(this: Self::With<T>) -> Self::With<U>; +} + +pub trait FunctorExt<T>: Sized { + type Base: Functor<With<T> = Self>; + + fn fmap<U>(self) { + let arg: <Self::Base as Functor>::With<T>; + let ret: <Self::Base as Functor>::With<U>; + + arg = self; + ret = <Self::Base as Functor>::fmap(arg); + //~^ type annotations needed + } +} + +fn main() {} diff --git a/src/test/ui/generic-associated-types/bugs/issue-91762.stderr b/src/test/ui/generic-associated-types/bugs/issue-91762.stderr new file mode 100644 index 000000000..1272c8b8a --- /dev/null +++ b/src/test/ui/generic-associated-types/bugs/issue-91762.stderr @@ -0,0 +1,14 @@ +error[E0282]: type annotations needed + --> $DIR/issue-91762.rs:24:15 + | +LL | ret = <Self::Base as Functor>::fmap(arg); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the associated function `fmap` + | +help: consider specifying the generic arguments + | +LL | ret = <Self::Base as Functor>::fmap::<T, U>(arg); + | ++++++++ + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0282`. |