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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-18937-1.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-18937-1.rs b/src/test/ui/issues/issue-18937-1.rs new file mode 100644 index 000000000..57e56d832 --- /dev/null +++ b/src/test/ui/issues/issue-18937-1.rs @@ -0,0 +1,21 @@ +// run-pass +// Test that we are able to type-check this example. In particular, +// knowing that `T: 'a` allows us to deduce that `[U]: 'a` (because +// when `T=[U]` it implies that `U: 'a`). +// +// Regr. test for live code we found in the wild when fixing #18937. + +pub trait Leak<T : ?Sized> { + fn leak<'a>(self) -> &'a T where T: 'a; +} + +impl<U> Leak<[U]> for Vec<U> { + fn leak<'a>(mut self) -> &'a [U] where [U]: 'a { + let r: *mut [U] = &mut self[..]; + std::mem::forget(self); + unsafe { &mut *r } + } +} +fn main() { + println!("Hello, world!"); +} |