1 // Make sure that we cannot return a `&` that got already invalidated.
2 fn foo(x: &mut (i32, i32)) -> &i32 {
3 let xraw = x as *mut (i32, i32);
4 let ret = unsafe { &(*xraw).1 };
5 unsafe { *xraw = (42, 23) }; // unfreeze
6 ret //~ ERROR: /retag .* tag does not exist in the borrow stack/