java.lang.Throwable: Using stale writer, possibly forgotten call to store, old owner Thread Thread[RepositoryUpdater.worker,1,system], new owner Thread Thread[AWT-EventQueue-0,6,IDE Main] .
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache$OwnerReference.assertNoModifiedWriter(LuceneIndex.java:1063)
   at org.netbeans.modules.parsing.lucene.LuceneIndex$DirCache.beginTx(LuceneIndex.java:782)
   at org.netbeans.modules.parsing.lucene.LuceneIndex.run(LuceneIndex.java:354)
   at org.netbeans.modules.parsing.lucene.DocumentIndexImpl.run(DocumentIndexImpl.java:192)
   at org.netbeans.modules.parsing.impl.indexing.lucene.LayeredDocumentIndex.begin(LayeredDocumentIndex.java:184)
   at org.netbeans.modules.parsing.spi.indexing.Context.attachIndexingSupport(Context.java:299)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.context_attachIndexingSupport(Indexable.java:235)
   at org.netbeans.modules.parsing.spi.indexing.support.IndexingSupport.getInstance(IndexingSupport.java:92)
   at org.netbeans.modules.php.editor.index.PHPIndexer$Factory.filesDirty(PHPIndexer.java:450)
   at org.netbeans.modules.csl.core.EmbeddingIndexerFactoryImpl.filesDirty(EmbeddingIndexerFactoryImpl.java:97)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.handleDocumentModification(RepositoryUpdater.java:1378)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.atomicUnlock(RepositoryUpdater.java:1190)
   at org.netbeans.editor.BaseDocument.fireAtomicUnlock(BaseDocument.java:1782)
   at org.netbeans.editor.BaseDocument.atomicUnlockImpl(BaseDocument.java:1696)
   at org.netbeans.editor.BaseDocument.atomicUnlockImpl(BaseDocument.java:1684)
   at org.netbeans.editor.GuardedDocument.runAtomicAsUser(GuardedDocument.java:356)
   at org.netbeans.editor.BaseKit$DefaultKeyTypedAction.actionPerformed(BaseKit.java:1151)
   at org.netbeans.editor.ext.ExtKit$ExtDefaultKeyTypedAction.actionPerformed(ExtKit.java:1081)
   at org.netbeans.modules.csl.core.CslEditorKit$GsfDefaultKeyTypedAction.actionPerformed(CslEditorKit.java:241)
   at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339)
   at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661)
   at javax.swing.JComponent.processKeyBinding(JComponent.java:2879)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2926)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2842)
   at java.awt.Component.processEvent(Component.java:6282)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1890)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:752)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1017)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:889)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:717)
   at java.awt.Component.dispatchEventImpl(Component.java:4731)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)