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Í'm using a developer build of Eclipse: Version: Photon Milestone 4 (4.8.0M4) Build id: 20171214-1849 and get the Exception below, if I delete a project from the workspace. This happenes with a newly created workspace. org.eclipse.e4.core.di.InjectionException: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:239) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:133) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:287) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:523) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:573) at org.eclipse.e4.ui.bindings.keys.OutOfOrderListener.handleEvent(OutOfOrderListener.java:72) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5581) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1363) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1389) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1372) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1401) at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:783) at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3563) at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:766) at org.eclipse.swt.widgets.Tree.gtk_key_press_event(Tree.java:2161) at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1981) at org.eclipse.swt.widgets.Control.windowProc(Control.java:6243) at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:4077) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5841) at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method) at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9174) at org.eclipse.swt.widgets.Display.eventProc(Display.java:1335) at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method) at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2133) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4413) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:681) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:595) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) 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:498) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590) at org.eclipse.equinox.launcher.Main.run(Main.java:1499) at org.eclipse.equinox.launcher.Main.main(Main.java:1472) Caused by: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:123) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:92) 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:498) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55) ... 53 more Caused by: org.eclipse.e4.core.di.InjectionException: java.lang.NullPointerException at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:239) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:133) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210) at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommandInContext(LegacyHandlerService.java:453) at org.eclipse.ui.internal.ide.actions.LTKLauncher.runCommand(LTKLauncher.java:96) at org.eclipse.ui.internal.ide.actions.LTKLauncher.openDeleteWizard(LTKLauncher.java:48) at org.eclipse.ui.actions.DeleteResourceAction.run(DeleteResourceAction.java:449) at org.eclipse.jdt.internal.ui.refactoring.reorg.DeleteAction.run(DeleteAction.java:194) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:271) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:249) at org.eclipse.jface.action.Action.runWithEvent(Action.java:473) at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:118) ... 59 more Caused by: java.lang.NullPointerException at org.eclipse.ltk.ui.refactoring.resource.DeleteResourcesWizard$DeleteResourcesRefactoringConfigurationPage.createControl(DeleteResourcesWizard.java:115) at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.createContents(RefactoringWizardDialog2.java:627) at org.eclipse.jface.window.Window.create(Window.java:426) at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1096) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation$1.run(RefactoringWizardOpenOperation.java:179) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:203) at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:122) at org.eclipse.ltk.internal.ui.refactoring.actions.DeleteResourcesHandler.execute(DeleteResourcesHandler.java:41) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:291) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:92) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55) ... 75 more
Caused by: java.lang.NullPointerException at org.eclipse.ltk.ui.refactoring.resource.DeleteResourcesWizard$DeleteResourcesRefactoringConfigurationPage.createControl(DeleteResourcesWizard.java:115) Which GTK theme / icon pack are you using? The problem is coming because your GTK icon theme does not defines an image for "Question Icon" or it can't be loaded by SWT for whatever reason. As a workaround, try to use "Adwaita" icon pack.
New Gerrit change created: https://git.eclipse.org/r/114490
Gerrit change https://git.eclipse.org/r/114490 was merged to [master]. Commit: http://git.eclipse.org/c/jdt/eclipse.jdt.ui.git/commit/?id=03e799643dd537e5abbc77b0dfead1a6c547892e
Thanks for the quick response. I was using the "Breeze" icon theme. Changing to "Adwaita" did not resolve the problem, but something seems to be broken in my system (Kubuntu 16.04), since the system settings dialog shows almost no icons.
The issue is fixed by applying the patch. It's a workaround for the causing problem that SWT returns a null image. Unlike in my comment below, I now doubt that it is (only) caused by my Linux system, since I see the right icon if I use an Eclipse oxygen - eventually to be solved in the context of bug 345477. (In reply to Ansgar Radermacher from comment #4) > Thanks for the quick response. I was using the "Breeze" icon theme. Changing > to "Adwaita" did not resolve the problem, but something seems to be broken > in my system (Kubuntu 16.04), since the system settings dialog shows almost > no icons.
(In reply to Ansgar Radermacher from comment #5) > The issue is fixed by applying the patch. It's a workaround for the causing > problem that SWT returns a null image. The callers of Display().getSystemImage() should always check the return value, because it is not guaranteed that the system provides that image.
