java.lang.AssertionError: Wrong diagnostic handler: com.sun.tools.javac.util.Log$DeferredDiagnosticHandler@34d6d921
Thread dump:
Code Completion
	sun.misc.Unsafe.park(Native Method)
	java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
	java.util.concurrent.locks.ReentrantLock$FairSync.lock(ReentrantLock.java:229)
	java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
	org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:193)
	org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
	org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:429)
	org.netbeans.api.java.source.JavaSource.runUserActionTa
   at com.sun.tools.javac.util.Assert.error(Assert.java:133)
   at com.sun.tools.javac.util.Assert.check(Assert.java:86)
   at com.sun.tools.javac.util.Log.popDiagnosticHandler(Log.java:481)
   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.java.completion.BaseTask.getEnvImpl(BaseTask.java:313)
   at org.netbeans.modules.java.completion.BaseTask.getCompletionEnvironment(BaseTask.java:265)
   at org.netbeans.modules.java.completion.JavaCompletionTask.resolve(JavaCompletionTask.java:258)
   at org.netbeans.modules.java.completion.BaseTask.run(BaseTask.java:92)
   at org.netbeans.modules.java.completion.JavaCompletionTask.run(JavaCompletionTask.java:80)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:234)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:59)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:294)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.AssertionError: Wrong diagnostic handler: com.sun.tools.javac.util.Log$DeferredDiagnosticHandler@34d6d921
Thread dump:
Code Completion
	sun.misc.Unsafe.park(Native Method)
	java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
	java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
	java.util.concurrent.locks.ReentrantLock$FairSync.lock(ReentrantLock.java:229)
	java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
	org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:193)
	org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
	org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.ja