Rollup merge of rust-lang#99270 - rhysd:issue-99269, r=Mark-Simulacrum

JohnTitor · web-flow · commit 283b24c65e49 · 2022-07-16T17:53:03.000+09:00
Add `#[must_use]` to `Box::from_raw` Fixes rust-lang#99269
diff --git a/alloc/src/boxed.rs b/alloc/src/boxed.rs
@@ -949,6 +949,7 @@ impl<T: ?Sized> Box<T> {
     /// [`Layout`]: crate::Layout
     #[stable(feature = "box_raw", since = "1.4.0")]
     #[inline]
+    #[must_use = "call `drop(from_raw(ptr))` if you intend to drop the `Box`"]
     pub unsafe fn from_raw(raw: *mut T) -> Self {
         unsafe { Self::from_raw_in(raw, Global) }
     }

Original file line number	Diff line number	Diff line change
`@@ -949,6 +949,7 @@ impl<T: ?Sized> Box<T> {`
`949`	`949`	/// [`Layout`]: crate::Layout
`950`	`950`	`#[stable(feature = "box_raw", since = "1.4.0")]`
`951`	`951`	`#[inline]`
	`952`	+ #[must_use = "call `drop(from_raw(ptr))` if you intend to drop the `Box`"]
`952`	`953`	`pub unsafe fn from_raw(raw: *mut T) -> Self {`
`953`	`954`	`unsafe { Self::from_raw_in(raw, Global) }`
`954`	`955`	`}`