--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/tests/gov/nasa/jpf/test/mc/basic/RecursiveLockTest.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+
+package gov.nasa.jpf.test.mc.basic;
+
+import gov.nasa.jpf.util.test.TestJPF;
+
+import org.junit.Test;
+
+/**
+ * Ensures that a recursive lock/unlock doesn't leave the lock in an acquired state.
+ */
+public class RecursiveLockTest extends TestJPF
+{
+   @Test
+   public void recursiveUnlock() throws InterruptedException
+   {
+      final Object lock;
+      Thread thread;
+      Runnable task;
+      
+      if (verifyNoPropertyViolation())
+      {
+         lock = new Object();
+         
+         synchronized (lock)
+         {
+            synchronized (lock)
+            {
+               // nothing to do
+            }
+         }
+         
+         task = new Runnable()
+         {
+            @Override
+			public void run()
+            {
+               synchronized (lock)
+               {
+                  // nothing to do
+               }
+            }  
+         };
+         
+         thread = new Thread(task);
+         
+         thread.start();
+         thread.join();
+      }
+   }
+}