Rollup merge of rust-lang#89769 - jkugelman:must-use-maybe-uninit-new…

…, r=joshtriplett Add #[must_use] to MaybeUninit::new As discussed in rust-lang#89729 (comment). Parent issue: rust-lang#89692 r? ``@joshtriplett``
matthiaskrgr · Oct 12, 2021 · 97625f2 · 97625f2
2 parents 97e3b30 + b0b09f0
commit 97625f2
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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 `forget` to avoid running Drop code"]
     #[inline(always)]
     pub const fn new(val: T) -> MaybeUninit<T> {
         MaybeUninit { value: ManuallyDrop::new(val) }