1 files changed, 17 insertions, 0 deletions
diff --git a/test/files/pos/t6815.scala b/test/files/pos/t6815.scala
new file mode 100644
index 0000000000..9244b3d353
--- /dev/null
+++ b/test/files/pos/t6815.scala
@@ -0,0 +1,17 @@
+trait U {
+  trait ValOrDefDefApi {
+    def name: Any
+  }
+  type ValOrDefDef <: ValOrDefDefApi
+  type ValDef <: ValOrDefDef with ValDefApi
+  trait ValDefApi extends ValOrDefDefApi { this: ValDef => }
+  val emptyValDef: ValDef // the result type is volatile
+}
+
+object Test {
+  val u: U = ???
+
+  u.emptyValDef match {
+    case u.emptyValDef => // but we shouldn't let that stop us from treating it as a stable identifier pattern.
+  }
+}