#![feature(box_syntax)] trait X { fn get_i(&self) -> isize; } struct B { i: isize } impl X for B { fn get_i(&self) -> isize { self.i } } struct A<'a> { p: &'a (X+'a) } fn make_a<'a>(p: &'a X) -> A<'a> { A { p: p } } fn make_make_a<'a>() -> A<'a> { let b: Box = box B {i:1}; let bb: &B = &*b; //~ ERROR does not live long enough make_a(bb) } fn main() { let _a = make_make_a(); }