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On September 12 the following code fragment was added to Builder.getDefaultOutputSettings(): IPath path = ManagedBuildManager.getBuildFullPath(cfg, this); IProject proj = cfg.getOwner().getProject(); IPath projFullPath = proj.getFullPath(); if(projFullPath.isPrefixOf(path)){ path = path.removeFirstSegments(projFullPath.segmentCount()).makeRelative(); } else { path = Path.EMPTY; } When build directory is outside of the workspace and is not linked to from the workspace, ManagedBuildManager.getBuildFullPath((cfg, this) returns null and projFullPath.isPrefixOf(path) throws an NPE. To reproduce, create a project and try to set build directory to /tmp. This exception should be considered a show stopper since it prevents CDT from opening any project that has build directory outside workspace. Adding a simple check: if (path != null && projFullPath.isPrefixOf(path)) { seems to help, but I don't understand the logic of this code and therefore not sure if this is a right solution. Here is the call stack for reference: java.lang.NullPointerException at org.eclipse.core.runtime.Path.isPrefixOf(Path.java:630) at org.eclipse.cdt.managedbuilder.internal.core.Builder.getDefaultOutputSettings(Builder.java:2641) at org.eclipse.cdt.managedbuilder.internal.core.Builder.getOutputEntries(Builder.java:2627) at org.eclipse.cdt.managedbuilder.internal.dataprovider.BuildBuildData.getOutputDirectories(BuildBuildData.java:48) at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultBuildData.copySettingsFrom(CDefaultBuildData.java:56) at org.eclipse.cdt.internal.core.settings.model.CBuildSettingCache.<init>(CBuildSettingCache.java:43) at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.copyBuildData(CConfigurationDescriptionCache.java:194) at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultConfigurationData.copySettingsFrom(CDefaultConfigurationData.java:106) at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.applyData(CConfigurationDescriptionCache.java:144) at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.applyDatas(CProjectDescription.java:217) at org.eclipse.cdt.internal.core.settings.model.SetCProjectDescriptionOperation.executeOperation(SetCProjectDescriptionOperation.java:69) at org.eclipse.cdt.internal.core.model.CModelOperation.execute(CModelOperation.java:342) at org.eclipse.cdt.internal.core.model.CModelOperation.run(CModelOperation.java:607) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1797) at org.eclipse.cdt.internal.core.model.CModelOperation.runOperation(CModelOperation.java:639) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.setProjectDescription(CProjectDescriptionManager.java:1250) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.setProjectDescription(CProjectDescriptionManager.java:1213) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.setProjectDescription(CProjectDescriptionManager.java:1206) at org.eclipse.cdt.core.model.CoreModel.setProjectDescription(CoreModel.java:1374) at org.eclipse.cdt.ui.newui.CDTPropertyManager.performOkForced(CDTPropertyManager.java:128) at org.eclipse.cdt.ui.newui.CDTPropertyManager.performOk(CDTPropertyManager.java:102) at org.eclipse.cdt.ui.newui.AbstractPage$5.run(AbstractPage.java:508) at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:68) at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1797) at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:369) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:313) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:495) at org.eclipse.cdt.ui.newui.AbstractPage.performSave(AbstractPage.java:517) at org.eclipse.cdt.ui.newui.AbstractPage.performOk(AbstractPage.java:448) at org.eclipse.jface.preference.PreferenceDialog$12.run(PreferenceDialog.java:926) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:857) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:46) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:199) at org.eclipse.jface.preference.PreferenceDialog.okPressed(PreferenceDialog.java:906) at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.okPressed(FilteredPreferenceDialog.java:374) at org.eclipse.jface.preference.PreferenceDialog.buttonPressed(PreferenceDialog.java:233) at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:616) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971) at org.eclipse.jface.window.Window.runEventLoop(Window.java:820) at org.eclipse.jface.window.Window.open(Window.java:796) at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:156) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:546) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447) at org.eclipse.equinox.launcher.Main.run(Main.java:1173) at org.eclipse.equinox.launcher.Main.main(Main.java:1148)
Created attachment 79051 [details] Possible fix I'm not sure this is the correct fix, but it at eliminates all visible symptoms of the problem.
Sergey, Your fix will be applied soon.
Done.
