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Diffstat (limited to 'src/library/scala/collection/immutable/HashMap.scala')
| -rw-r--r-- | src/library/scala/collection/immutable/HashMap.scala | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/library/scala/collection/immutable/HashMap.scala b/src/library/scala/collection/immutable/HashMap.scala index 72e58cb521..acb3867cfa 100644 --- a/src/library/scala/collection/immutable/HashMap.scala +++ b/src/library/scala/collection/immutable/HashMap.scala @@ -350,7 +350,10 @@ object HashMap extends ImmutableMapFactory[HashMap] with BitOperations.Int { Array.copy(elems, 0, elemsNew, 0, offset) Array.copy(elems, offset + 1, elemsNew, offset, elems.length - offset - 1) val sizeNew = size - sub.size - new HashTrieMap(bitmapNew, elemsNew, sizeNew) + if (elemsNew.length == 1 && !elemsNew(0).isInstanceOf[HashTrieMap[_,_]]) + elemsNew(0) + else + new HashTrieMap(bitmapNew, elemsNew, sizeNew) } else HashMap.empty[A,B] } else { |