rust/tests/ui/traits/trait-upcasting/migrate-lint-deny-regions.s...

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warning: this `Deref` implementation is covered by an implicit supertrait coercion
--> $DIR/migrate-lint-deny-regions.rs:9:1
|
LL | impl<'a> Deref for dyn Foo<'a> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `dyn Foo<'_>` implements `Deref<Target = dyn Bar<'_>>` which conflicts with supertrait `Bar<'_>`
LL |
LL | type Target = dyn Bar<'a>;
| -------------------------- target type is a supertrait of `dyn Foo<'_>`
|
note: the lint level is defined here
--> $DIR/migrate-lint-deny-regions.rs:2:9
|
LL | #![warn(deref_into_dyn_supertrait)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^
warning: 1 warning emitted