diff options
-rw-r--r-- | src/library/scala/MatchError.scala | 10 | ||||
-rw-r--r-- | test/files/run/t7912.scala | 16 |
2 files changed, 24 insertions, 2 deletions
diff --git a/src/library/scala/MatchError.scala b/src/library/scala/MatchError.scala index 6ba7e833d3..9965bb19b5 100644 --- a/src/library/scala/MatchError.scala +++ b/src/library/scala/MatchError.scala @@ -23,9 +23,15 @@ final class MatchError(obj: Any) extends RuntimeException { /** There's no reason we need to call toString eagerly, * so defer it until getMessage is called. */ - private lazy val objString = + private lazy val objString = { + def ofClass = "of class " + obj.getClass.getName if (obj == null) "null" - else obj.toString() + " (of class " + obj.getClass.getName + ")" + else try { + obj.toString() + " (" + ofClass + ")" + } catch { + case _: Throwable => "an instance " + ofClass + } + } override def getMessage() = objString } diff --git a/test/files/run/t7912.scala b/test/files/run/t7912.scala new file mode 100644 index 0000000000..3d603e0e97 --- /dev/null +++ b/test/files/run/t7912.scala @@ -0,0 +1,16 @@ +case object A { override def toString = ??? } + +object Test { + def foo: Int = (A: Any) match { + case 0 => 0 + } + def main(args: Array[String]): Unit = { + try { + foo + sys.error("no exception") + } catch { + case me: MatchError => assert(me.getMessage == "an instance of class A$", me.getMessage) + case ex: Throwable => sys.error("not a match error: " + ex.getClass) + } + } +} |