After crash, running IDE cause unexpected exception.

java.util.ConcurrentModificationException
	at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
	at java.util.AbstractList$Itr.next(Unknown Source)
	at
org.netbeans.modules.javacore.jmiimpl.javamodel.LightAttrList$LightAttrListIterator.next(LightAttrList.java:450)
	at
org.netbeans.modules.javacore.jmiimpl.javamodel.FeaturesList$FeatureListIterator.next(FeaturesList.java:471)
	at
org.netbeans.modules.java.bridge.ObjectsCollection.getElements(ObjectsCollection.java:115)
	at
org.netbeans.modules.java.bridge.MethodsCollection.getMethods(MethodsCollection.java:82)
	at
org.netbeans.modules.java.bridge.ClassElementImpl.getMethods(ClassElementImpl.java:571)
	at org.openide.src.ClassElement.getMethods(ClassElement.java:491)
	at org.openide.src.ClassElement.hasMainMethod(ClassElement.java:808)
	at
org.netbeans.modules.executionprofile.ProjectConfigure.hasMainMethod(ProjectConfigure.java:548)
	at
org.netbeans.modules.executionprofile.InstallHook$3.resultChanged(InstallHook.java:125)
	at org.openide.util.lookup.SimpleProxyLookup.checkLookup(SimpleProxyLookup.java:85)
	at org.openide.util.lookup.SimpleProxyLookup.access$000(SimpleProxyLookup.java:36)
	at
org.openide.util.lookup.SimpleProxyLookup$ProxyResult.checkResult(SimpleProxyLookup.java:147)
	at
org.openide.util.lookup.SimpleProxyLookup$ProxyResult.allItems(SimpleProxyLookup.java:227)
	at
org.netbeans.modules.project.ui.actions.LookupSensitiveAction.init(LookupSensitiveAction.java:77)
	at
org.netbeans.modules.project.ui.actions.LookupSensitiveAction.getValue(LookupSensitiveAction.java:87)
	at org.openide.awt.Toolbar$Folder.createInstance(Toolbar.java:1011)
	at
org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:742)
	at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:74)
	at org.openide.loaders.FolderInstance$2.run(FolderInstance.java:628)
	at org.openide.util.Task.run(Task.java:222)
	at org.openide.awt.AWTTask.run(AWTTask.java:35)
	at org.openide.awt.AWTTask.waitFinished(AWTTask.java:42)
	at org.openide.loaders.FolderInstance.waitFinished(FolderInstance.java:298)
	at org.openide.loaders.FolderInstance.instanceCreate(FolderInstance.java:240)
	at org.openide.loaders.FolderInstance.instanceForCookie(FolderInstance.java:521)
	at
org.openide.loaders.FolderInstance$HoldInstance.instanceCreate(FolderInstance.java:1006)
	at org.openide.awt.ToolbarPool$Folder.createInstance(ToolbarPool.java:506)
	at
org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:742)
	at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:74)
	at org.openide.loaders.FolderInstance$2.run(FolderInstance.java:628)
	at org.openide.util.Task.run(Task.java:222)
	at org.openide.awt.AWTTask.run(AWTTask.java:35)
	at org.openide.awt.AWTTask.waitFinished(AWTTask.java:42)
	at org.openide.loaders.FolderInstance.waitFinished(FolderInstance.java:298)
	at org.openide.loaders.FolderInstance.instanceFinished(FolderInstance.java:271)
	at org.openide.awt.ToolbarPool.waitFinished(ToolbarPool.java:223)
	at
org.netbeans.core.windows.view.ui.MainWindow.getToolbarComponent(MainWindow.java:401)
	at
org.netbeans.core.windows.view.ui.MainWindow.initializeComponents(MainWindow.java:153)
	at
org.netbeans.core.windows.view.DefaultView.showWindowSystem(DefaultView.java:506)
	at
org.netbeans.core.windows.view.DefaultView.windowSystemVisibilityChanged(DefaultView.java:485)
	at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:169)
	at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:244)
	at
org.netbeans.core.windows.ViewRequestor.processVisibilityRequest(ViewRequestor.java:233)
	at
org.netbeans.core.windows.ViewRequestor.postVisibilityRequest(ViewRequestor.java:170)
	at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:91)
	at org.netbeans.core.windows.Central.setVisible(Central.java:80)
	at
org.netbeans.core.windows.WindowManagerImpl.setVisible(WindowManagerImpl.java:716)
	at org.netbeans.core.windows.WindowSystemImpl.show(WindowSystemImpl.java:62)
[catch] at org.netbeans.core.NonGui$3.run(NonGui.java:229)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)