diff options
| -rw-r--r-- | library/alloc/src/collections/vec_deque/mod.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/library/alloc/src/collections/vec_deque/mod.rs b/library/alloc/src/collections/vec_deque/mod.rs index 1573b3d77dc..d08c372cd7d 100644 --- a/library/alloc/src/collections/vec_deque/mod.rs +++ b/library/alloc/src/collections/vec_deque/mod.rs @@ -1917,7 +1917,7 @@ impl<T, A: Allocator> VecDeque<T, A> { #[stable(feature = "append", since = "1.4.0")] pub fn append(&mut self, other: &mut Self) { if T::IS_ZST { - self.len += other.len; + self.len = self.len.checked_add(other.len).expect("capacity overflow"); other.len = 0; other.head = 0; return; |