--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/InterfaceAssert.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 4399129 6980724
+ * @summary Check that assertions compile properly when nested in an interface
+ * @author gafter
+ * @compile InterfaceAssert.java
+ * @run main InterfaceAssert
+ */
+
+/*
+ * Verify that assertions compile properly within a top-level interface
+ */
+
+interface I {
+    class C {
+        C(){}
+        public void test(String s) {
+            assert s == "Yup";
+        }
+    }
+}
+
+public class InterfaceAssert {
+    public static void main(String[] args) {
+        I.C c = new I.C();
+        c.test("Yup");
+    }
+}