diff options
Diffstat (limited to 'src/test/ui/associated-types/associated-types-outlives.rs')
-rw-r--r-- | src/test/ui/associated-types/associated-types-outlives.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-outlives.rs b/src/test/ui/associated-types/associated-types-outlives.rs new file mode 100644 index 000000000..55c276280 --- /dev/null +++ b/src/test/ui/associated-types/associated-types-outlives.rs @@ -0,0 +1,28 @@ +// Regression test for issue #24622. The older associated types code +// was erroneously assuming that all projections outlived the current +// fn body, causing this (invalid) code to be accepted. + +pub trait Foo<'a> { + type Bar; +} + +impl<'a, T:'a> Foo<'a> for T { + type Bar = &'a T; +} + +fn denormalise<'a, T>(t: &'a T) -> <T as Foo<'a>>::Bar { + t +} + +pub fn free_and_use<T: for<'a> Foo<'a>, + F: for<'a> FnOnce(<T as Foo<'a>>::Bar)>(x: T, f: F) { + let y; + 'body: loop { // lifetime annotations added for clarity + 's: loop { y = denormalise(&x); break } + drop(x); //~ ERROR cannot move out of `x` because it is borrowed + return f(y); + } +} + +pub fn main() { +} |