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/patterns/NullsInDeconstructionPatterns.java

@@ -0,0 +1,34 @@
+/*
+ * @test /nodynamiccopyright/
+ * @summary Testing record patterns against the null constant (14.30.2 Pattern Matching)
+ */
+
+public class NullsInDeconstructionPatterns {
+
+    class Super {}
+    class Sub extends Super {}
+    record R(Super s) {}
+
+    public static void main(String[] args) {
+
+        R r = new R(null);
+
+        if (r instanceof R(Super s1)) {
+            System.out.println("R(Super s1) is resolved to the R(any pattern) and does match");
+        } else {
+            throw new AssertionError("broken");
+        }
+
+        if (r instanceof R(Object o)) {
+            System.out.println("R(Object) is resolved to the R(any pattern) and does match");
+        } else {
+            throw new AssertionError("broken");
+        }
+
+        if (r instanceof R(Sub s2)) {
+            throw new AssertionError("broken");
+        } else {
+            System.out.println("R(Sub s2) is resolved to the pattern R(Sub s) and does not match");
+        }
+    }
+}