Rollup merge of #30040 - apasel422:issue-30031, r=brson

Closes #30031.
2015-11-25 09:21:19 +05:30 · 2015-11-25 09:21:19 +05:30 · 529689f0dc
commit 529689f0dc
parent 3f25c5c655 0fc1f9a2ed
1 changed files with 5 additions and 0 deletions
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@ -637,6 +637,11 @@ impl<T: ?Sized> Weak<T> {
                return None
            }

+            // See comments in `Arc::clone` for why we do this (for `mem::forget`).
+            if n > MAX_REFCOUNT {
+                unsafe { abort(); }
+            }
+
            // Relaxed is valid for the same reason it is on Arc's Clone impl
            let old = inner.strong.compare_and_swap(n, n + 1, Relaxed);
            if old == n {