diff options
| -rw-r--r-- | compiler/rustc_data_structures/src/sorted_map.rs | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/compiler/rustc_data_structures/src/sorted_map.rs b/compiler/rustc_data_structures/src/sorted_map.rs index 9409057d484..60b343afbed 100644 --- a/compiler/rustc_data_structures/src/sorted_map.rs +++ b/compiler/rustc_data_structures/src/sorted_map.rs @@ -49,12 +49,11 @@ impl<K: Ord, V> SortedMap<K, V> { } #[inline] - pub fn insert(&mut self, key: K, mut value: V) -> Option<V> { + pub fn insert(&mut self, key: K, value: V) -> Option<V> { match self.lookup_index_for(&key) { Ok(index) => { let slot = unsafe { self.data.get_unchecked_mut(index) }; - mem::swap(&mut slot.1, &mut value); - Some(value) + Some(mem::replace(&mut slot.1, value)) } Err(index) => { self.data.insert(index, (key, value)); |