--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/CyclicInheritance.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,57 @@
+/*
+ * @test  /nodynamiccopyright/
+ * @bug 4018525 4059072 4277274 4785453
+ * @summary Test that recursive 'extends' and 'implements' clauses are detected
+ * and disallowed.
+ *
+ * @run shell CyclicInheritance.sh
+ */
+
+
+
+
+
+
+class C1 extends C1 {}                  // ERROR - Cyclic inheritance
+
+class C11 extends C12 {}                // ERROR - Cyclic inheritance
+class C12 extends C11 {}                // error in previous line could correctly be reported here as well
+
+interface I1 extends I1 {}              // ERROR - Cyclic inheritance
+
+interface I11 extends I12 {}            // ERROR - Cyclic inheritance
+interface I12 extends I11 {}            // error in previous line could correctly be reported here as well
+
+//-----
+
+class C211 implements C211.I {          // ERROR - may change pending resoluation of 4087020
+        interface I {};                 // error in previous line could correctly be reported here as well
+}
+
+class C212 extends C212.C {             // ERROR - Cyclic inheritance, subclass cannot enclose superclass
+        static class C {};              // error in previous line could correctly be reported here as well
+}
+
+
+class C221 implements C221.I {          // ERROR - Cannot access C21 (private)
+        private interface I {};         // error in previous line could correctly be reported here as well
+}
+
+class C222 extends C222.C {             // ERROR - Cannot access C22 (private)
+        private static class C {};      // error in previous line could correctly be reported here as well
+}
+
+//-----
+
+class C3 {
+    class A {
+        class B extends A {}
+    }
+}
+
+class C4 {
+    class A extends B {}
+    class B {
+        class C extends A {}
+    }
+}