--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/FrameStateBuilder.java	Wed Jun 19 20:24:27 2013 +0200
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/FrameStateBuilder.java	Wed Jun 19 23:46:55 2013 +0200
@@ -172,6 +172,9 @@
         for (int i = 0; i < stackSize(); i++) {
             storeStack(i, merge(stackAt(i), other.stackAt(i), block));
         }
+        for (int i = 0; i < locks.length; i++) {
+            locks[i] = merge(locks[i], other.locks[i], block);
+        }
     }
 
     private ValueNode merge(ValueNode currentValue, ValueNode otherValue, MergeNode block) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.jtt/src/com/oracle/graal/jtt/threads/SynchronizedLoopExit01.java	Wed Jun 19 23:46:55 2013 +0200
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+/*
+ */
+package com.oracle.graal.jtt.threads;
+
+import org.junit.*;
+
+import com.oracle.graal.jtt.*;
+
+/**
+ * Inspired by {@code com.sun.media.sound.DirectAudioDevice$DirectDL.drain()}.
+ * 
+ * Two loop exits hold a monitor while merging.
+ * 
+ */
+public final class SynchronizedLoopExit01 extends JTTTest {
+
+    protected Object object = new Object();
+    protected volatile boolean drained = false;
+    protected volatile boolean someBoolean = true;
+
+    public boolean test() {
+        boolean b = true;
+        while (!drained) {
+            synchronized (object) {
+                boolean c = b = someBoolean;
+                if (c || drained) {
+                    break;
+                }
+            }
+        }
+        return b;
+    }
+
+    @Test
+    public void run0() throws Throwable {
+        runTest("test");
+    }
+
+}