error: lifetime may not live long enough --> $DIR/region-object-lifetime-4.rs:12:5 | LL | fn borrowed_receiver_related_lifetimes2<'a,'b>(x: &'a (dyn Foo + 'b)) -> &'b () { | -- -- lifetime `'b` defined here | | | lifetime `'a` defined here LL | x.borrowed() | ^^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a` | = help: consider adding the following bound: `'a: 'b` error: aborting due to previous error