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/lambda/MostSpecific05.java

@@ -0,0 +1,28 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  Structural most specific doesn't handle cases with wildcards in functional interfaces
+ * @compile/fail/ref=MostSpecific05.out -XDrawDiagnostics MostSpecific05.java
+ */
+public class MostSpecific05 {
+
+    interface ObjectConverter<T extends Object> {
+        T map(Object o);
+    }
+
+    interface NumberConverter<T extends Number> {
+        T map(Object o);
+    }
+
+    static class MyMapper<A extends Object, B extends Number> {
+        void map(ObjectConverter<? extends A> m) { }
+        void map(NumberConverter<? extends B> m) { }
+    }
+
+    public static void meth() {
+        MyMapper<Number, Double> mm = new MyMapper<Number, Double>();
+        mm.map(e->1.0); //ambiguous - implicit
+        mm.map((Object e)->1.0); //ok
+    }
+}