| error[E0371]: the object type `(dyn Foo + 'a)` automatically implements the trait `Foo` | |
| --> $DIR/issue-20939.rs:3:1 | |
| | | |
| LL | impl<'a> Foo for dyn Foo + 'a {} | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Foo + 'a)` automatically implements trait `Foo` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0371`. |