// Checks that unions use type based qualification. Regression test for issue #90268. use std::cell::Cell; use std::mem::ManuallyDrop; union U { i: u32, c: ManuallyDrop<Cell<u32>> } const C1: ManuallyDrop<Cell<u32>> = { unsafe { U { c: ManuallyDrop::new(Cell::new(0)) }.c } }; const C2: ManuallyDrop<Cell<u32>> = { unsafe { U { i : 0 }.c } }; const C3: ManuallyDrop<Cell<u32>> = { let mut u = U { i: 0 }; u.i = 1; unsafe { u.c } }; const C4: U = U { i: 0 }; const C5: [U; 1] = [U {i : 0}; 1]; fn main() { // Interior mutability should prevent promotion. let _: &'static _ = &C1; //~ ERROR temporary value dropped while borrowed let _: &'static _ = &C2; //~ ERROR temporary value dropped while borrowed let _: &'static _ = &C3; //~ ERROR temporary value dropped while borrowed let _: &'static _ = &C4; //~ ERROR temporary value dropped while borrowed let _: &'static _ = &C5; //~ ERROR temporary value dropped while borrowed }