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/lambdaExpression/EffectivelyFinal_neg.java

@@ -0,0 +1,25 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *   Negative test of capture of "effectively final" local variable in lambda expressions
+ * @compile/fail/ref=EffectivelyFinal_neg.out -XDrawDiagnostics EffectivelyFinal_neg.java
+ */
+
+public class EffectivelyFinal_neg {
+
+    void test() {
+        String s = "a";
+        String s2 = "a";
+        int n = 1;
+        ((Runnable)
+            ()-> {
+                s2 = "b"; //re-assign illegal here
+                System.out.println(n);
+                System.out.println(s);
+                s = "b"; // not effectively final
+            }
+        ).run();
+        n = 2; // not effectively final
+    }
+}