diff options
Diffstat (limited to 'src/libstd/collections')
| -rw-r--r-- | src/libstd/collections/hash/map.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs index 536ce2e16a0..11ccf206d00 100644 --- a/src/libstd/collections/hash/map.rs +++ b/src/libstd/collections/hash/map.rs @@ -11,6 +11,7 @@ use self::Entry::*; use self::VacantEntryState::*; +use intrinsics::unlikely; use collections::CollectionAllocErr; use cell::Cell; use borrow::Borrow; @@ -1992,6 +1993,9 @@ impl<'a, K, V, S> RawEntryBuilder<'a, K, V, S> fn search<F>(self, hash: u64, is_match: F, compare_hashes: bool) -> Option<(&'a K, &'a V)> where F: FnMut(&K) -> bool { + if unsafe { unlikely(self.map.table.size() == 0) } { + return None; + } match search_hashed_nonempty(&self.map.table, SafeHash::new(hash), is_match, |