1 files changed, 11 insertions, 0 deletions
diff --git a/tests/patmat/t6818.scala b/tests/patmat/t6818.scala
new file mode 100644
index 000000000..2334095c4
--- /dev/null
+++ b/tests/patmat/t6818.scala
@@ -0,0 +1,11 @@
+object Test {
+  type Id[X] = X
+
+  def foo(x:Id[Option[Int]]) = x match {
+    case Some(n) => "foo"
+    case None => "bar"
+  }
+
+  foo(Some(3)) // "foo"
+  foo(None) // "bar"
+}
+\ No newline at end of file