1 files changed, 18 insertions, 0 deletions
diff --git a/tests/run/t3603.scala b/tests/run/t3603.scala
new file mode 100644
index 000000000..25ca49b54
--- /dev/null
+++ b/tests/run/t3603.scala
@@ -0,0 +1,18 @@
+
+
+
+object Test {
+
+  def main(args: Array[String]): Unit = {
+    import collection.immutable._
+
+    val intmap = IntMap(1 -> 1, 2 -> 2)
+    val intres = intmap.map { case (a, b) => (a, b.toString) }
+    assert(intres.isInstanceOf[IntMap[_]])
+
+    val longmap = LongMap(1L -> 1, 2L -> 2)
+    val longres = longmap.map { case (a, b) => (a, b.toString) }
+    assert(longres.isInstanceOf[LongMap[_]])
+  }
+
+}