1 error[E0621]: explicit lifetime required in the type of `a`
2 --> $DIR/issue-14285.rs:12:5
4 LL | fn foo<'a>(a: &dyn Foo) -> B<'a> {
5 | -------- help: add explicit lifetime `'a` to the type of `a`: `&'a (dyn Foo + 'a)`
7 | ^^^^ lifetime `'a` required
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0621`.