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/T8175317.java

@@ -0,0 +1,31 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8175317
+ * @summary javac does not issue unchecked warnings when checking method reference return types
+ * @compile/fail/ref=T8175317.out -Werror -Xlint:unchecked -XDrawDiagnostics T8175317.java
+ */
+
+import java.util.function.*;
+import java.util.*;
+
+class T8175317 {
+    void m(Supplier<List<String>> s) { }
+
+    void testMethodLambda(List l) {
+        m(() -> l);
+    }
+
+    void testAssignLambda(List l) {
+        Supplier<List<String>> s = () -> l;
+    }
+
+    void testMethodMref() {
+        m(this::g);
+    }
+
+    void testAssignMref() {
+        Supplier<List<String>> s = this::g;
+    }
+
+    List g() { return null; }
+}