--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/generics/diamond/T6939780.java	Tue Nov 02 12:01:35 2010 +0000
@@ -0,0 +1,25 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 6939780
+ *
+ * @summary  add a warning to detect diamond sites
+ * @author mcimadamore
+ * @compile/ref=T6939780.out T6939780.java -XDrawDiagnostics -XDfindDiamond
+ *
+ */
+
+class T6939780 {
+
+    void test() {
+        class Foo<X extends Number> {
+            Foo() {}
+            Foo(X x) {}
+        }
+        Foo<Number> f1 = new Foo<Number>(1);
+        Foo<?> f2 = new Foo<Number>();
+        Foo<?> f3 = new Foo<Integer>();
+        Foo<Number> f4 = new Foo<Number>(1) {};
+        Foo<?> f5 = new Foo<Number>() {};
+        Foo<?> f6 = new Foo<Integer>() {};
+    }
+}