1 // Regression test for issue #24622. The older associated types code
2 // was erroneously assuming that all projections outlived the current
3 // fn body, causing this (invalid) code to be accepted.
4
5 pub trait Foo<'a> {
6 type Bar;
7 }
8
9 impl<'a, T:'a> Foo<'a> for T {
10 type Bar = &'a T;
11 }
12
denormalise<'a, T>(t: &'a T) -> <T as Foo<'a>>::Bar13 fn denormalise<'a, T>(t: &'a T) -> <T as Foo<'a>>::Bar {
14 t
15 }
16
free_and_use<T: for<'a> Foo<'a>, F: for<'a> FnOnce(<T as Foo<'a>>::Bar)>(x: T, f: F)17 pub fn free_and_use<T: for<'a> Foo<'a>,
18 F: for<'a> FnOnce(<T as Foo<'a>>::Bar)>(x: T, f: F) {
19 let y;
20 'body: loop { // lifetime annotations added for clarity
21 's: loop { y = denormalise(&x); break }
22 drop(x); //~ ERROR cannot move out of `x` because it is borrowed
23 return f(y);
24 }
25 }
26
main()27 pub fn main() {
28 }
29