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Diffstat (limited to 'src/library')
| -rw-r--r-- | src/library/scala/collection/convert/Wrappers.scala | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/library/scala/collection/convert/Wrappers.scala b/src/library/scala/collection/convert/Wrappers.scala index 6dab7c0e02..56f1802509 100644 --- a/src/library/scala/collection/convert/Wrappers.scala +++ b/src/library/scala/collection/convert/Wrappers.scala @@ -214,6 +214,9 @@ private[collection] trait Wrappers { } override def containsKey(key: AnyRef): Boolean = try { + // Note: Subclass of collection.Map with specific key type may redirect generic + // contains to specific contains, which will throw a ClassCastException if the + // wrong type is passed. This is why we need a type cast to A inside a try/catch. underlying.contains(key.asInstanceOf[A]) } catch { case ex: ClassCastException => false |