Rollup merge of rust-lang#23561 - steveklabnik:gh23422, r=alexcrichton

Fixes rust-lang#23422
Manishearth · Mar 24, 2015 · 566becb · 566becb
2 parents 413c0c9 + 2750e3c
commit 566becb
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/liballoc/heap.rs b/src/liballoc/heap.rs
@@ -26,6 +26,9 @@ pub unsafe fn allocate(size: usize, align: usize) -> *mut u8 {
 ///
 /// On failure, return a null pointer and leave the original allocation intact.
 ///
+/// If the allocation was relocated, the memory at the passed-in pointer is
+/// undefined after the call.
+///
 /// Behavior is undefined if the requested size is 0 or the alignment is not a
 /// power of 2. The alignment must be no larger than the largest supported page
 /// size on the platform.