3 #![feature(maybe_uninit)]
5 use std::mem::MaybeUninit;
7 // Boxing a `MaybeUninit` value should not copy junk from the stack
9 pub fn box_uninitialized() -> Box<MaybeUninit<usize>> {
10 // CHECK-LABEL: @box_uninitialized
15 Box::new(MaybeUninit::uninit())
18 // FIXME: add a test for a bigger box. Currently broken, see
19 // https://github.com/rust-lang/rust/issues/58201.