diff -r 000000000000 -r 959103a6100f test/tools/javac/rawDiags/Warning.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/rawDiags/Warning.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,17 @@
+/*
+ * @test  /nodynamiccopyright/
+ * @bug 6177732
+ * @summary add hidden option to have compiler generate diagnostics in more machine-readable form
+ * @compile/ref=Warning.out -XDrawDiagnostics -Xlint:unchecked Warning.java
+ */
+
+import java.util.HashSet;
+import java.util.Set;
+
+class Warning
+{
+    static void useUnchecked() {
+        Set s = new HashSet<String>();
+        s.add("abc");
+    }
+}