1 files changed, 13 insertions, 0 deletions
diff --git a/tests/untried/neg/t7877.scala b/tests/untried/neg/t7877.scala
new file mode 100644
index 000000000..52e167f3b
--- /dev/null
+++ b/tests/untried/neg/t7877.scala
@@ -0,0 +1,13 @@
+class Test {
+  val X: OnNext[Any] = null
+  def Y: OnNext[Any] = null
+  (null: Any) match {
+    case X() => ()             // allowed
+    case Y() => ()             // not allowed
+    case OnNext[Any]() => ()   // should *not* be allowed, but was.
+  }
+}
+
+class OnNext[+T] {
+  def unapply(x: Any) = false
+}