Fix #1490: type test of union types via type alias

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/run/i1490.scala b/tests/run/i1490.scala
new file mode 100644
index 000000000..554bc3940
--- /dev/null
+++ b/tests/run/i1490.scala
@@ -0,0 +1,13 @@
+class Base {
+  type T = Int | Boolean
+  def test(x: Object) = x.isInstanceOf[T]
+}
+
+object Test {
+  def main(args: Array[String]) = {
+    val b = new Base
+    println(b.test(Int.box(3)))
+    println(b.test(Boolean.box(false)))
+    println(b.test(Double.box(3.4)))
+  }
+}
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