New upstream version 1.46.0~beta.2+dfsg1

[rustc.git] / src / test / ui / impl-trait / bound-normalization-fail.stderr

warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/bound-normalization-fail.rs:4:12
   |
LL | #![feature(impl_trait_in_bindings)]
   |            ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default
   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information

error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as impl_trait::Trait>::Assoc`
  --> $DIR/bound-normalization-fail.rs:27:32
   |
LL |     fn foo_fail<T: Trait>() -> impl FooLike<Output=T::Assoc> {
   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found associated type
   |
   = note:         expected type `()`
           found associated type `<T as impl_trait::Trait>::Assoc`
   = note: the return type of a function must have a statically known size
help: consider constraining the associated type `<T as impl_trait::Trait>::Assoc` to `()`
   |
LL |     fn foo_fail<T: Trait<Assoc = ()>>() -> impl FooLike<Output=T::Assoc> {
   |                         ^^^^^^^^^^^^

error[E0760]: `impl Trait` return type cannot contain a projection or `Self` that references lifetimes from a parent scope
  --> $DIR/bound-normalization-fail.rs:43:41
   |
LL |     fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output=T::Assoc> {
   |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'static>>::Assoc`
  --> $DIR/bound-normalization-fail.rs:43:41
   |
LL |     fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output=T::Assoc> {
   |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found associated type
   |
   = note:         expected type `()`
           found associated type `<T as lifetimes::Trait<'static>>::Assoc`
   = note: the return type of a function must have a statically known size
help: consider constraining the associated type `<T as lifetimes::Trait<'static>>::Assoc` to `()`
   |
LL |     fn foo2_fail<'a, T: Trait<'a, Assoc = ()>>() -> impl FooLike<Output=T::Assoc> {
   |                                 ^^^^^^^^^^^^

error: aborting due to 3 previous errors; 1 warning emitted

Some errors have detailed explanations: E0271, E0760.
For more information about an error, try `rustc --explain E0271`.