error[E0521]: borrowed data escapes outside of closure --> $DIR/ice-6256.rs:13:26 | LL | let f = |x: &dyn TT| x.func(); | - - ^^^^^^^^ | | | | | | | `x` escapes the closure body here | | | argument requires that `'1` must outlive `'static` | | let's call the lifetime of this reference `'1` | `x` is a reference that is only valid in the closure body error: aborting due to previous error For more information about this error, try `rustc --explain E0521`.