--- a/src/share/classes/sun/awt/AppContext.java	Thu Apr 25 21:37:41 2013 -0700
+++ b/src/share/classes/sun/awt/AppContext.java	Mon May 06 16:30:42 2013 +0400
@@ -190,10 +190,16 @@
     public static final String DISPOSED_PROPERTY_NAME = "disposed";
     public static final String GUI_DISPOSED = "guidisposed";
 
-    private volatile boolean isDisposed = false; // true if AppContext is disposed
+    private enum State {
+        VALID,
+        BEING_DISPOSED,
+        DISPOSED
+    };
+
+    private volatile State state = State.VALID;
 
     public boolean isDisposed() {
-        return isDisposed;
+        return state == State.DISPOSED;
     }
 
     /*
@@ -392,10 +398,11 @@
         }
 
         synchronized(this) {
-            if (this.isDisposed) {
-                return; // If already disposed, bail.
+            if (this.state != State.VALID) {
+                return; // If already disposed or being disposed, bail.
             }
-            this.isDisposed = true;
+
+            this.state = State.BEING_DISPOSED;
         }
 
         final PropertyChangeSupport changeSupport = this.changeSupport;
@@ -465,6 +472,11 @@
             } catch (InterruptedException e) { }
         }
 
+        // We are done with posting events, so change the state to disposed
+        synchronized(this) {
+            this.state = State.DISPOSED;
+        }
+
         // Next, we interrupt all Threads in the ThreadGroup
         this.threadGroup.interrupt();
             // Note, the EventDispatchThread we've interrupted may dump an

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/sun/awt/AppContext/8012933/Test8012933.java	Mon May 06 16:30:42 2013 +0400
@@ -0,0 +1,92 @@
+/*
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 8012933
+ * @summary Tests (although somewhat indirectly) that createNewAppContext()
+ * immediately followed by dispose() works correctly
+ * @author Leonid Romanov
+ */
+
+import sun.awt.SunToolkit;
+import sun.awt.AppContext;
+
+public class Test8012933 {
+    private AppContext appContext = null;
+    final ThreadGroup threadGroup = new ThreadGroup("test thread group");
+    final Object lock = new Object();
+    boolean isCreated = false;
+
+    public static void main(String[] args) throws Exception {
+        SunToolkit.createNewAppContext();
+        new Test8012933().test();
+    }
+
+    private void test() throws Exception {
+        createAppContext();
+        long startTime = System.currentTimeMillis();
+        appContext.dispose();
+        long endTime = System.currentTimeMillis();
+
+        // In case of the bug, calling dispose() when there is no EQ
+        // dispatch thread running fails to create it, so it takes
+        // almost 10 sec to return from dispose(), which is spent
+        // waiting on the notificationLock.
+        if ((endTime - startTime) > 9000) {
+            throw new RuntimeException("Returning from dispose() took too much time, probably a bug");
+        }
+    }
+
+    private void createAppContext() {
+        isCreated = false;
+        final Runnable runnable = new Runnable() {
+                public void run() {
+                    appContext = SunToolkit.createNewAppContext();
+                    synchronized (lock) {
+                        isCreated = true;
+                        lock.notifyAll();
+                    }
+                }
+            };
+
+        final Thread thread = new Thread(threadGroup, runnable, "creates app context");
+        synchronized (lock) {
+            thread.start();
+            while (!isCreated) {
+                try {
+                    lock.wait();
+                } catch (InterruptedException ie) {
+                    ie.printStackTrace();
+                }
+            }
+        }
+
+        if (appContext == null) {
+            throw new RuntimeException("failed to create app context.");
+        } else {
+            System.out.println("app context was created.");
+        }
+    }
+
+}