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+++ This bug was initially created as a clone of Bug #428476 +++ From looking at the code, org.eclipse.ui.externaltools.internal.ui.BuilderPropertyPage#getInputProject() can return null, but the caller code never seems to do anything special to handle that case. NullPointerException occurs when opening a Project Proeprties page by right-clicking on a projects 'JavaScript Resources' library and selecting 'Project Preferences' on the preference page. !ENTRY org.eclipse.jface 4 2 2014-02-18 21:22:10.611 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface". !STACK 0 java.lang.NullPointerException at org.eclipse.core.externaltools.internal.model.BuilderCoreUtils.getBuilderFolder(BuilderCoreUtils.java:233) at org.eclipse.ui.externaltools.internal.model.BuilderUtils.getBuilderFolder(BuilderUtils.java:136) at org.eclipse.ui.externaltools.internal.ui.BuilderPropertyPage.checkBuilderFolder(BuilderPropertyPage.java:1067) at org.eclipse.ui.externaltools.internal.ui.BuilderPropertyPage.performCancel(BuilderPropertyPage.java:1232) at org.eclipse.jface.preference.PreferenceDialog$1.run(PreferenceDialog.java:265) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176) at org.eclipse.jface.preference.PreferenceDialog.cancelPressed(PreferenceDialog.java:263) at org.eclipse.jface.preference.PreferenceDialog.buttonPressed(PreferenceDialog.java:240) at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:633) 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.Display.sendEvent(Display.java:4423) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3771) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3391) at org.eclipse.jface.window.Window.runEventLoop(Window.java:827) at org.eclipse.jface.window.Window.open(Window.java:803) at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:158) at org.eclipse.jface.action.Action.runWithEvent(Action.java:499) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:588) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:505) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:415) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4423) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3771) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3391) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1122) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1006) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:146) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:615) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:109) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:80) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:372) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:226) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) 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)
The fix for the issue is pushed to Gerrit for review: https://git.eclipse.org/r/22196
(In reply to Victor Rubezhny from comment #1) > The fix for the issue is pushed to Gerrit for review: > > https://git.eclipse.org/r/22196 Merged into master: http://git.eclipse.org/c/platform/eclipse.platform.debug.git/commit/?id=195d9b2e47ff252337418e91d5e56151b5342d99 Thanks Victor.
