Got this exception switching (ctrl + tab) into a java class..

SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.spi.editor.completion.support.AsyncCompletionTask
java.lang.AssertionError: Wrong diagnostic handler: com.sun.tools.javac.util.Log$DeferredDiagnosticHandler@67533890
	at com.sun.tools.javac.util.Assert.error(Assert.java:133)
	at com.sun.tools.javac.util.Assert.check(Assert.java:94)
	at com.sun.tools.javac.util.Log.popDiagnosticHandler(Log.java:467)
	at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:888)
	at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:847)
	at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:726)
	at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:124)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.getEnvImpl(JavaCompletionProvider.java:5594)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.getCompletionEnvironment(JavaCompletionProvider.java:5549)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.resolveToolTip(JavaCompletionProvider.java:464)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.run(JavaCompletionProvider.java:452)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery$Task.run(JavaCompletionProvider.java:5883)
	at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
	at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
	at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
	at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
	at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
	at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
	at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
	at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
	at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
	at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:320)
	at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to
WARNING [org.netbeans.core.TimableEventQueue]: too much time in AWT thread null


system info:

>System Info: 
  Product Version         = NetBeans IDE Dev (Build 201312110002) (#4fccddfaeb2c)
  Operating System        = Windows 8 version 6.2 running on amd64
  Java; VM; Vendor        = 1.8.0-ea; Java HotSpot(TM) 64-Bit Server VM 25.0-b61; Oracle Corporation
  Runtime                 = Java(TM) SE Runtime Environment 1.8.0-ea-b119
  Java Home               = C:\Program Files\Java\jdk1.8.0\jre
  System Locale; Encoding = da_DK (nb); Cp1252
  Home Directory          = C:\Users\Anders
  Current Directory       = C:\Program Files\NetBeans Dev 201312110002
  User Directory          = C:\Users\Anders\AppData\Roaming\NetBeans\dev
  Cache Directory         = C:\Users\Anders\AppData\Local\NetBeans\Cache\dev
  Installation            = C:\Program Files\NetBeans Dev 201312110002\nb
                            C:\Program Files\NetBeans Dev 201312110002\ergonomics
                            C:\Program Files\NetBeans Dev 201312110002\ide
                            C:\Program Files\NetBeans Dev 201312110002\extide
                            C:\Program Files\NetBeans Dev 201312110002\java
                            C:\Program Files\NetBeans Dev 201312110002\apisupport
                            C:\Program Files\NetBeans Dev 201312110002\webcommon
                            C:\Program Files\NetBeans Dev 201312110002\websvccommon
                            C:\Program Files\NetBeans Dev 201312110002\enterprise
                            C:\Program Files\NetBeans Dev 201312110002\profiler
                            C:\Program Files\NetBeans Dev 201312110002\php
                            C:\Program Files\NetBeans Dev 201312110002\harness
                            C:\Program Files\NetBeans Dev 201312110002\groovy
                            C:\Program Files\NetBeans Dev 201312110002\javafx
                            C:\Program Files\NetBeans Dev 201312110002\platform
  Boot & Ext. Classpath   = C:\Program Files\Java\jdk1.8.0\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\rt.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0\jre\classes;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\zipfs.jar
  Application Classpath   = C:\Users\Anders\AppData\Roaming\NetBeans\dev\lib\jfluid-server-15.jar;C:\Users\Anders\AppData\Roaming\NetBeans\dev\lib\jfluid-server-cvm.jar;C:\Users\Anders\AppData\Roaming\NetBeans\dev\lib\jfluid-server.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\boot.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\org-openide-modules.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\org-openide-util-lookup.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\org-openide-util.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\boot_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\boot_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\boot_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\boot_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-modules_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-modules_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-modules_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-modules_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util-lookup_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util-lookup_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util-lookup_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util-lookup_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\lib\locale\org-openide-util_zh_CN.jar;C:\Program Files\Java\jdk1.8.0\lib\dt.jar;C:\Program Files\Java\jdk1.8.0\lib\tools.jar
  Startup Classpath       = C:\Program Files\NetBeans Dev 201312110002\platform\core\core.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\org-openide-filesystems.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\core_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\core_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\core_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\core_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\org-openide-filesystems_ja.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\org-openide-filesystems_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\org-openide-filesystems_ru.jar;C:\Program Files\NetBeans Dev 201312110002\platform\core\locale\org-openide-filesystems_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\org-netbeans-upgrader.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\core_nb.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\core_nb_ja.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\core_nb_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\core_nb_ru.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\core_nb_zh_CN.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\org-netbeans-upgrader_ja.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\org-netbeans-upgrader_pt_BR.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\org-netbeans-upgrader_ru.jar;C:\Program Files\NetBeans Dev 201312110002\nb\core\locale\org-netbeans-upgrader_zh_CN.jar