java.lang.ClassCastException: com.sun.tools.javac.code.Type$ForAll cannot be cast to com.sun.tools.javac.code.Type$MethodType at org.netbeans.api.java.source.ElementUtilities.findUnimplementedMethods(ElementUtilities.java:812) at org.netbeans.api.java.source.ElementUtilities.findUnimplementedMethods(ElementUtilities.java:792) at org.netbeans.api.java.source.ElementUtilities.findUnimplementedMethods(ElementUtilities.java:574) at org.netbeans.modules.java.hints.errors.ImplementAllAbstractMethods.createMessage(ImplementAllAbstractMethods.java:138) at org.netbeans.modules.java.hints.infrastructure.ErrorHintsProvider.computeErrors(ErrorHintsProvider.java:197) at org.netbeans.modules.java.hints.infrastructure.ErrorPositionRefresherHelper.getErrorDescriptionsAt(ErrorPositionRefresherHelper.java:84) at org.netbeans.modules.java.hints.spiimpl.JavaHintsPositionRefresher$RefreshTask.run(JavaHintsPositionRefresher.java:151) at org.netbeans.modules.java.hints.spiimpl.JavaHintsPositionRefresher$RefreshTask.run(JavaHintsPositionRefresher.java:121) at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:479) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609) at org.netbeans.modules.parsing.api.ParserManager$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:429) at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:400) at org.netbeans.modules.java.hints.spiimpl.JavaHintsPositionRefresher$1.run(JavaHintsPositionRefresher.java:108) at org.netbeans.modules.progress.ui.RunOffEDTImpl$1.run(RunOffEDTImpl.java:169) at org.openide.util.RequestProcessor$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.ClassCastException: com.sun.tools.javac.code.Type$ForAll cannot be cast to com.sun.tools.javac.code.Type$MethodType at org.openide.util.RequestProcessor.post(RequestProcessor.java:420) at org.netbeans.modules.progress.ui.RunOffEDTImpl.runOffEventDispatchThreadImpl(RunOffEDTImpl.java:163) at org.netbeans.modules.progress.ui.RunOffEDTImpl.runOffEventDispatchThread(RunOffEDTImpl.java:106) at org.netbeans.api.progress.BaseProgressUtils.runOffEventDispatchThread(BaseProgressUtils.java:113) at org.netbeans.api.progress.ProgressUtils.runOffEventDispatchThread(ProgressUtils.java:90) at org.netbeans.modules.java.hints.spiimpl.JavaHintsPositionRefresher.getErrorDescriptionsAt(JavaHintsPositionRefresher.java:115) at org.netbeans.modules.editor.hints.HintsUI.refresh(HintsUI.java:989) at org.netbeans.modules.editor.hints.HintsUI.invokeDefaultAction(HintsUI.java:665) at org.netbeans.modules.editor.hints.HintsUI.keyPressed(HintsUI.java:747) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:250) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:249) at java.awt.Component.processKeyEvent(Component.java:6483) at javax.swing.JComponent.processKeyEvent(JComponent.java:2832) at java.awt.Component.processEvent(Component.java:6302) at java.awt.Container.processEvent(Container.java:2234) at java.awt.Component.dispatchEventImpl(Component.java:4881) at java.awt.Container.dispatchEventImpl(Container.java:2292) at java.awt.Component.dispatchEvent(Component.java:4703) 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:4752) at java.awt.Container.dispatchEventImpl(Container.java:2292) at java.awt.Window.dispatchEventImpl(Window.java:2750) at java.awt.Component.dispatchEvent(Component.java:4703) 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$1.doIntersectionPrivilege(ProtectionDomain.java:75) at java.security.ProtectionDomain$1.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$1.doIntersectionPrivilege(ProtectionDomain.java:75) 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)