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/MostSpecific09.java

@@ -0,0 +1,81 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8029718 8065800
+ * @summary Should always use lambda body structure to disambiguate overload resolution
+ * @compile/fail/ref=MostSpecific09.out -XDrawDiagnostics --should-stop=ifError=ATTR --should-stop=ifNoError=ATTR --debug=verboseResolution=applicable,success MostSpecific09.java
+ */
+
+class MostSpecific09 {
+
+    interface I {
+        String xoo(String x);
+    }
+
+    interface J {
+        void xoo(int x);
+    }
+
+    static void foo(I i) {}
+    static void foo(J j) {}
+
+    static void moo(I i) {}
+    static void moo(J j) {}
+
+    void m() {
+        foo((x) -> { return x += 1; });
+        foo((x) -> { return ""; });
+        foo((x) -> { System.out.println(""); });
+        foo((x) -> { return ""; System.out.println(""); });
+        foo((x) -> { throw new RuntimeException(); });
+        foo((x) -> { while (true); });
+
+        foo((x) -> x += 1);
+        foo((x) -> "");
+    }
+
+    /* any return statement that is not in the body of the lambda but in an
+     * inner class or another lambda should be ignored for value void compatibility
+     * determination.
+     */
+    void m1() {
+        boolean cond = true;
+        foo((x) -> {
+            if (cond) {
+                return "";
+            }
+            System.out.println("");
+        });
+
+        foo((x)->{
+            class Bar {
+                String m() {
+                    return "from Bar.m()";
+                }
+            }
+            class Boo {
+                Bar b = new Bar (){
+                    String m() {
+                        return "from Bar$1.m()";
+                    }
+                };
+            }
+            moo((y) -> { return ""; });
+            return;
+        });
+
+        foo((x)->{
+            class Bar {
+                void m() {}
+            }
+            class Boo {
+                Bar b = new Bar (){
+                    void m() {
+                        return;
+                    }
+                };
+            }
+            moo((y) -> { System.out.println(""); });
+            return "";
+        });
+    }
+}