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Using this class: public interface Change<T, R, E extends Exception> { R apply(T t) throws E; default <V> Change<V, R, E> from(Change<? super V, ? extends T, E> before) { // extract method between -> and ; return (V v) -> apply(before.apply(v)); } } What steps will reproduce the problem? 1. Copy-paste the class above to a workspace with BETA_JAVA8 plugins installed. 2. Select the text "apply(before.apply(v))" and activate Extract method-refactoring, give it some name foo and click Ok. 3. An error message dialog is displayed. -- Error Details -- Date: Wed Jan 15 15:04:15 EET 2014 Message: Internal Error Severity: Error Product: Eclipse SDK 4.3.1.v20130911-1000 (org.eclipse.sdk.ide) Plugin: org.eclipse.ltk.ui.refactoring Session Data: eclipse.buildId=4.3.0.M20130911-1000 java.version=1.8.0-ea java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Command-line arguments: -os win32 -ws win32 -arch x86_64 Exception Stack Trace: java.lang.reflect.InvocationTargetException at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421) at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.run(RefactoringWizardDialog2.java:331) at org.eclipse.ltk.ui.refactoring.RefactoringWizard.internalPerformFinish(RefactoringWizard.java:637) at org.eclipse.ltk.ui.refactoring.UserInputWizardPage.performFinish(UserInputWizardPage.java:153) at org.eclipse.ltk.ui.refactoring.RefactoringWizard.performFinish(RefactoringWizard.java:710) at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.okPressed(RefactoringWizardDialog2.java:455) at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:476) at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:628) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759) at org.eclipse.jface.window.Window.runEventLoop(Window.java:826) at org.eclipse.jface.window.Window.open(Window.java:802) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation$1.run(RefactoringWizardOpenOperation.java:187) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:202) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:122) at org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringStarter.activate(RefactoringStarter.java:38) at org.eclipse.jdt.ui.actions.ExtractMethodAction.run(ExtractMethodAction.java:90) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:279) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251) at org.eclipse.jface.action.Action.runWithEvent(Action.java:499) at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90) at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:285) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:504) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:555) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:376) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:322) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:84) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1056) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066) at org.eclipse.swt.widgets.Control.traverse(Control.java:4107) at org.eclipse.swt.widgets.Control.translateMnemonic(Control.java:3949) at org.eclipse.swt.widgets.Composite.translateMnemonic(Composite.java:1206) at org.eclipse.swt.widgets.Control.translateMnemonic(Control.java:3967) at org.eclipse.swt.widgets.Display.translateMnemonic(Display.java:4777) at org.eclipse.swt.widgets.Display.filterMessage(Display.java:1276) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3755) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) at org.eclipse.equinox.launcher.Main.run(Main.java:1450) at org.eclipse.equinox.launcher.Main.main(Main.java:1426) Caused by: java.lang.NullPointerException at org.eclipse.jdt.internal.corext.dom.Bindings.findMethodInType(Bindings.java:358) at org.eclipse.jdt.internal.corext.dom.Bindings.findMethodInHierarchy(Bindings.java:385) at org.eclipse.jdt.internal.corext.refactoring.Checks.checkMethodInHierarchy(Checks.java:338) at org.eclipse.jdt.internal.corext.refactoring.code.ExtractMethodAnalyzer.checkInput(ExtractMethodAnalyzer.java:321) at org.eclipse.jdt.internal.corext.refactoring.code.ExtractMethodRefactoring.checkFinalConditions(ExtractMethodRefactoring.java:478) at org.eclipse.ltk.core.refactoring.CheckConditionsOperation.run(CheckConditionsOperation.java:85) at org.eclipse.ltk.core.refactoring.CreateChangeOperation.run(CreateChangeOperation.java:121) at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:209) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345) at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
*** This bug has been marked as a duplicate of bug 406786 ***
