error[E0621]: explicit lifetime required in the type of `foo`
  --> $DIR/issue-63388-1.rs:14:9
   |
LL |         foo
   |         ^^^ lifetime `'a` required
   |
help: add explicit lifetime `'a` to the type of `foo`
   |
LL -         &'a self, foo: &dyn Foo
LL +         &'a self, foo: &'a (dyn Foo + 'a)
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0621`.