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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/util/Collections/SingletonIterator.java
+++ b/test/jdk/java/util/Collections/SingletonIterator.java
@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8024500 8166446
+ * @run testng SingletonIterator
+ */
+
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.fail;
+
+@Test(groups = "unit")
+public class SingletonIterator {
+    static void assertIteratorExhausted(Iterator<?> it) {
+        assertFalse(it.hasNext());
+        try {
+            it.next();
+            fail("should have thrown NoSuchElementException");
+        } catch (NoSuchElementException success) { }
+        it.forEachRemaining(e -> { throw new AssertionError("action called incorrectly"); });
+    }
+
+    public void testForEachRemaining() {
+        Iterator<String> it = Collections.singleton("TheOne").iterator();
+        AtomicInteger cnt = new AtomicInteger(0);
+
+        it.forEachRemaining(s -> {
+            assertEquals("TheOne", s);
+            cnt.incrementAndGet();
+        });
+
+        assertEquals(cnt.get(), 1);
+        assertIteratorExhausted(it);
+    }
+
+    static class SingletonException extends RuntimeException { }
+
+    public void testThrowFromForEachRemaining() {
+        Iterator<String> it = Collections.singleton("TheOne").iterator();
+
+        try {
+            it.forEachRemaining(s -> { throw new SingletonException(); });
+        } catch (SingletonException ignore) { }
+
+        assertIteratorExhausted(it);
+    }
+}