Add #[must_use] to MaybeUninit::new

2021-10-11 10:03:55 -04:00 · 2021-10-11 10:03:55 -04:00 · 3ac0ae21d5
commit 3ac0ae21d5
parent 86d6d2b738
1 changed files with 1 additions and 0 deletions
--- a/library/core/src/mem/maybe_uninit.rs
+++ b/library/core/src/mem/maybe_uninit.rs
@ -291,6 +291,7 @@ impl<T> MaybeUninit<T> {
    /// [`assume_init`]: MaybeUninit::assume_init
    #[stable(feature = "maybe_uninit", since = "1.36.0")]
    #[rustc_const_stable(feature = "const_maybe_uninit", since = "1.36.0")]
+    #[must_use = "use `ManuallyDrop` or `forget` to avoid running drop code"]
    #[inline(always)]
    pub const fn new(val: T) -> MaybeUninit<T> {
        MaybeUninit { value: ManuallyDrop::new(val) }