rust/tests/ui/traits/trait-upcasting/deref-lint.stderr
2023-11-22 21:51:39 +00:00

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warning: this `Deref` implementation is covered by an implicit supertrait coercion
--> $DIR/deref-lint.rs:9:1
|
LL | impl<'a> Deref for dyn 'a + B {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `dyn B` implements `Deref<Target = dyn A>` which conflicts with supertrait `A`
...
LL | type Target = dyn A;
| -------------------- target type is a supertrait of `dyn B`
|
= help: consider removing this implementation or replacing it with a method instead
= note: `#[warn(deref_into_dyn_supertrait)]` on by default
warning: 1 warning emitted