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/Neg14.java

@@ -0,0 +1,11 @@
+/* @test /nodynamiccopyright/
+ * @bug 7192246
+ * @summary check that a class cannot have two sibling interfaces with a default and abstract method
+ * @compile/fail/ref=Neg14.out -XDrawDiagnostics Neg14.java
+ */
+class Neg14 {
+    interface IA { int m(); }
+    interface IB { default int m() { return 1; } }
+
+    abstract class AB implements IA, IB {}
+}