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//@ 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!");
}
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