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Use checked_add in VecDeque::append for ZSTs to avoid overflow

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pommicket 2023-02-25 11:05:21 -05:00
parent 26c98689f2
commit 379b18bb0a
1 changed files with 1 additions and 1 deletions
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library/alloc/src/collections/vec_deque/mod.rs
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@ -1917,7 +1917,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
#[stable(feature = "append", since = "1.4.0")] #[stable(feature = "append", since = "1.4.0")]
pub fn append(&mut self, other: &mut Self) { pub fn append(&mut self, other: &mut Self) {
if T::IS_ZST { if T::IS_ZST {
self.len += other.len; self.len = self.len.checked_add(other.len).expect("capacity overflow");
other.len = 0; other.len = 0;
other.head = 0; other.head = 0;
return; return;