--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/T6595666.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2009, 2015, 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 6595666
+ * @summary fix -Werror
+ * @modules jdk.compiler
+ */
+
+import java.io.*;
+import java.util.*;
+
+public class T6595666 {
+    void m() {
+        // the following line must create warnings with -Xlint, because of unchecked conversion
+        List<Integer> list = new ArrayList();
+    }
+
+    public static void main(String... args) throws Exception {
+        File testSrc = new File(System.getProperty("test.src", "."));
+
+        String basename = T6595666.class.getName();
+        File srcFile = new File(testSrc, basename+".java");
+        File classFile = new File(basename+".class");
+        classFile.delete();
+        if (classFile.exists())
+            throw new Exception("setup error, can't delete " + classFile);
+
+        compile(1, "-d", ".", "-Xlint", "-Werror", srcFile.getPath());
+        if (classFile.exists())
+            throw new Exception("failed: found " + classFile);
+
+        compile(0, "-d", ".", "-Xlint", srcFile.getPath());
+        if (!classFile.exists())
+            throw new Exception("failed: " + classFile + " not found");
+    }
+
+    private static void compile(int rc, String... args) throws Exception {
+        System.err.println("compile: " + Arrays.asList(args));
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        int rc2 = com.sun.tools.javac.Main.compile(args, pw);
+        pw.close();
+        System.err.println(sw);
+        if (rc != rc2)
+            throw new Exception("bad exit code; expected " + rc + ", found " + rc2);
+    }
+}