rust/tests/ui/traits/issue-71036.stderr

error[E0277]: the trait bound `&'a T: Unsize<&'a U>` is not satisfied
  --> $DIR/issue-71036.rs:11:1
   |
LL | impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Foo<'a, U>> for Foo<'a, T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unsize<&'a U>` is not implemented for `&'a T`
   |
   = note: all implementations of `Unsize` are provided automatically by the compiler, see <https://doc.rust-lang.org/stable/std/marker/trait.Unsize.html> for more information
   = note: required for `&'a &'a T` to implement `DispatchFromDyn<&'a &'a U>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not. 2020-09-02 07:40:56 +00:00			error[E0277]: the trait bound `&'a T: Unsize<&'a U>` is not satisfied
Don't ICE on missing `Unsize` impl 2020-05-14 10:37:58 +00:00			`--> $DIR/issue-71036.rs:11:1`
			`\|`
			`LL \| impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Foo<'a, U>> for Foo<'a, T> {}`
Shorten def_span for more items. 2022-02-13 15:27:59 +00:00			\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unsize<&'a U>` is not implemented for `&'a T`
Don't ICE on missing `Unsize` impl 2020-05-14 10:37:58 +00:00			`\|`
			= note: all implementations of `Unsize` are provided automatically by the compiler, see <https://doc.rust-lang.org/stable/std/marker/trait.Unsize.html> for more information
Reword "Required because of the requirements on the impl of ..." 2022-08-15 20:31:37 +00:00			= note: required for `&'a &'a T` to implement `DispatchFromDyn<&'a &'a U>`
Don't ICE on missing `Unsize` impl 2020-05-14 10:37:58 +00:00
			`error: aborting due to previous error`

			For more information about this error, try `rustc --explain E0277`.