diff -r 000000000000 -r 959103a6100f test/tools/javac/generics/inference/6315770/T6315770.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/inference/6315770/T6315770.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,19 @@
+/**
+ * @test /nodynamiccopyright/
+ * @bug     6315770
+ * @summary javac inference allows creation of strange types: Integer & Runnable
+ * @author Maurizio Cimadamore
+ *
+ * @compile/fail/ref=T6315770.out T6315770.java -XDrawDiagnostics
+ */
+
+class T6315770<V> {
+    <T extends Integer & Runnable> T6315770<T> m() {
+        return null;
+    }
+    void test() {
+        T6315770<?> c1 = m();
+        T6315770<? extends String> c2 = m();
+        T6315770<? super String> c3 = m();
+    }
+}