java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:126)
   at com.sun.tools.javac.util.Assert.checkNonNull(Assert.java:61)
   at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1174)
   at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1123)
   at com.sun.tools.javac.main.JavaCompiler.resolveIdent(JavaCompiler.java:728)
   at com.sun.tools.javac.model.JavacElements.nameToSymbol(JavacElements.java:161)
   at com.sun.tools.javac.model.JavacElements.getTypeElement(JavacElements.java:109)
   at com.sun.tools.javac.model.JavacElements.getTypeElement(JavacElements.java:61)
   at org.netbeans.modules.java.source.save.ElementOverlay.resolve(ElementOverlay.java:211)
   at org.netbeans.modules.java.source.pretty.ImportAnalysis2.setPackage(ImportAnalysis2.java:137)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.rewriteChildren(ImmutableTreeTranslator.java:542)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitCompilationUnit(ImmutableTreeTranslator.java:345)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitCompilationUnit(ImmutableTreeTranslator.java:97)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:551)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.translate(ImmutableTreeTranslator.java:146)
   at org.netbeans.api.java.source.WorkingCopy$5.translate(WorkingCopy.java:814)
   at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:838)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:1253)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:645)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:632)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:486)
   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$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:436)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:407)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:653)
   at org.netbeans.modules.java.hints.FieldForUnusedParam$FixImpl.implement(FieldForUnusedParam.java:251)
   at org.netbeans.modules.editor.hints.HintsUI$1.run(HintsUI.java:837)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.netbeans.modules.editor.hints.HintsUI.invokeHint(HintsUI.java:834)
   at org.netbeans.modules.editor.hints.HintsUI.keyPressed(HintsUI.java:761)
   at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:250)
   at java.awt.Component.processKeyEvent(Component.java:6493)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2832)
   at java.awt.Component.processEvent(Component.java:6312)
   at java.awt.Container.processEvent(Container.java:2236)
   at java.awt.Component.dispatchEventImpl(Component.java:4891)
   at java.awt.Container.dispatchEventImpl(Container.java:2294)
   at java.awt.Component.dispatchEvent(Component.java:4713)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
   at java.awt.Component.dispatchEventImpl(Component.java:4762)
   at java.awt.Container.dispatchEventImpl(Container.java:2294)
   at java.awt.Window.dispatchEventImpl(Window.java:2750)
   at java.awt.Component.dispatchEvent(Component.java:4713)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:731)
   at java.awt.EventQueue$4.run(EventQueue.java:729)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   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)