undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/langtools/tools/javac/defaultMethods/Neg05.java

@@ -0,0 +1,16 @@
+/* @test /nodynamiccopyright/
+ * @bug 7192246
+ * @summary check that abstract methods are compatible with inherited defaults
+ * @compile/fail/ref=Neg05.out -XDrawDiagnostics Neg05.java
+ */
+
+class Neg05 {
+    interface IA1 { default Number m() { return Neg05.m1(this); } }
+    interface IA2 extends IA1 { default Integer m() { return Neg05.m2(this); } }
+    interface IA3 extends IA2 { Number m(); } //error
+
+    static class C implements IA3{}
+
+    static int m1(IA1 a) { return 0; }
+    static int m2(IA2 b) { return 0; }
+}