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/TryWithResources/ImplicitFinal.java

@@ -0,0 +1,40 @@
+/*
+ * @test  /nodynamiccopyright/
+ * @bug 6911256 6964740 6965277 7013420
+ * @author Maurizio Cimadamore
+ * @summary Test that resource variables are implicitly final
+ * @compile/fail/ref=ImplicitFinal.out -XDrawDiagnostics ImplicitFinal.java
+ */
+
+import java.io.IOException;
+
+class ImplicitFinal implements AutoCloseable {
+    public static void meth() {
+        try(ImplicitFinal r = new ImplicitFinal()) {
+            r = null; //disallowed
+        } catch (IOException ioe) { // Not reachable
+            throw new AssertionError("Shouldn't reach here", ioe);
+        }
+
+        try(@SuppressWarnings("unchecked") ImplicitFinal r1 = new ImplicitFinal()) {
+            r1 = null; //disallowed
+        } catch (IOException ioe) { // Not reachable
+            throw new AssertionError("Shouldn't reach here", ioe);
+        }
+
+        try(final ImplicitFinal r2 = new ImplicitFinal()) {
+            r2 = null; //disallowed
+        } catch (IOException ioe) { // Not reachable
+            throw new AssertionError("Shouldn't reach here", ioe);
+        }
+
+        try(final @SuppressWarnings("unchecked") ImplicitFinal r3 = new ImplicitFinal()) {
+            r3 = null; //disallowed
+        } catch (IOException ioe) { // Not reachable
+            throw new AssertionError("Shouldn't reach here", ioe);
+        }
+    }
+    public void close() throws IOException {
+        throw new IOException();
+    }
+}