java.util.ConcurrentModificationException occured!

[shellcompute]

Description

I've just talked with a friend for some words, and sent a picture with my mobile-qq, after that, I cleared the message-history in my idea, and then I got this error alert. It seems that you changed the arraylist object while iterate it.

Error Detail:

null
java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:903)
    at java.util.ArrayList$Itr.next(ArrayList.java:853)
    at cn.ieclipse.wechat.WXContactTreeNode.update(WXContactTreeNode.java:38)
    at cn.ieclipse.wechat.WXContactView.doUpdateContacts(WXContactView.java:118)
    at cn.ieclipse.smartim.views.IMContactView$4.run(IMContactView.java:89)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
    at java.awt.EventQueue.access$500(EventQueue.java:98)
    at java.awt.EventQueue$3.run(EventQueue.java:715)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:786)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:727)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:395)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Thanks!

[Jamling]

Thank you for your feedback~