mirror of
https://github.com/rust-lang/rust.git
synced 2025-06-06 12:18:33 +00:00
22 lines
467 B
Rust
22 lines
467 B
Rust
|
// compile-flags:-Zborrowck=mir
|
||
|
|
|
||
|
|
#![feature(existential_type)]
|
||
|
|
|
||
|
|
#[derive(Clone)]
|
||
|
|
struct CopyIfEq<T, U>(T, U);
|
||
|
|
|
||
|
|
impl<T: Copy> Copy for CopyIfEq<T, T> {}
|
||
|
|
|
||
|
|
existential type E<'a, 'b>: Sized;
|
||
|
|
//~^ ERROR lifetime may not live long enough
|
||
|
|
|
||
|
|
fn foo<'a, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> {
|
||
|
|
let v = CopyIfEq::<*mut _, *mut _>(&mut {x}, &mut y);
|
||
|
|
let u = v;
|
||
|
|
let _: *mut &'a i32 = u.1;
|
||
|
|
unsafe { let _: &'b i32 = *u.0; }
|
||
|
|
u.0
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {}
|