--- old/src/java.desktop/share/classes/java/awt/SequencedEvent.java	2017-08-14 11:23:09.125929600 +0530
+++ new/src/java.desktop/share/classes/java/awt/SequencedEvent.java	2017-08-14 11:23:08.483929600 +0530
@@ -106,13 +106,15 @@
 
             if (getFirst() != this) {
                 if (EventQueue.isDispatchThread()) {
-                    EventDispatchThread edt = (EventDispatchThread)
-                        Thread.currentThread();
-                    edt.pumpEvents(SentEvent.ID, new Conditional() {
-                        public boolean evaluate() {
-                            return !SequencedEvent.this.isFirstOrDisposed();
-                        }
-                    });
+                    if (Thread.currentThread() instanceof EventDispatchThread) {
+                        EventDispatchThread edt = (EventDispatchThread)
+                                Thread.currentThread();
+                        edt.pumpEvents(SentEvent.ID, new Conditional() {
+                            public boolean evaluate() {
+                                return !SequencedEvent.this.isFirstOrDisposed();
+                            }
+                        });
+                    }
                 } else {
                     while(!isFirstOrDisposed()) {
                         synchronized (SequencedEvent.class) {