diff -r 000000000000 -r 959103a6100f test/tools/javac/generics/7020657/T7020657neg.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/7020657/T7020657neg.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,23 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 7020657 6985719
+ *
+ * @summary  Javac rejects a fairly common idiom with raw override and interfaces
+ * @author Maurizio Cimadamore
+ * @compile/fail/ref=T7020657neg.out -XDrawDiagnostics T7020657neg.java
+ *
+ */
+
+import java.util.*;
+
+class T7020657neg {
+    interface A {
+        int get(List<String> l);
+    }
+
+    interface B  {
+        int get(List<Integer> l);
+    }
+
+    interface C extends A, B { }
+}