1 files changed, 21 insertions, 0 deletions
diff --git a/test/files/run/patmatnew.scala b/test/files/run/patmatnew.scala
index 51c823f7ac..6ec3928757 100644
--- a/test/files/run/patmatnew.scala
+++ b/test/files/run/patmatnew.scala
@@ -823,6 +823,27 @@ object Test extends TestConsoleMain {
       }
     }
   }
+
+  object Ticket522 { // compile-only
+  class Term[X]
+  object App {
+     // i'm hidden
+     case class InternalApply[Y,Z](fun:Y=>Z, arg:Y) extends Term[Z]
+
+     def apply[Y,Z](fun:Y=>Z, arg:Y): Term[Z] =
+       new InternalApply[Y,Z](fun,arg)
+
+     def unapply[X](arg: Term[X]): Option[(Y=>Z,Y)] forSome {type Y; type Z} =
+         arg match {
+           case i:InternalApply[y,z] => Some(i.fun, i.arg)
+           case _                    => None
+         }
+  }
+
+  App({x: Int => x}, 5) match {
+    case App(arg, a) =>
+  }
+  } // end Ticket522
 }