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Build Identifier: 20110615-0604 With CDT8 (Indigo) I can not remove environment variables from Window->Preferences->C/C++->Build->Environment any more. I can set them and change them, but I cannot delete them. Reproducible: Always Steps to Reproduce: 1. Add an new environment variable to "Window->Preferences->C/C++->Build->Environment" 2. Restart Eclipse => variable is still there, as expected. 3. Delete that Variable from "Window->Preferences->C/C++->Build->Environment" 4. Restart Eclipse 5. Variable is still present. You have to delete it manually from .metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.cdt.core.prefs to get rid of it.
I also managed induce an exception acting randomly in UI on variable like that, in particular trying to edit and "Apply": java.lang.NullPointerException at org.eclipse.cdt.ui.newui.EnvironmentTab.handleEnvDelButtonSelected(EnvironmentTab.java:449) at org.eclipse.cdt.ui.newui.EnvironmentTab.buttonPressed(EnvironmentTab.java:282) at org.eclipse.cdt.ui.newui.AbstractCPropertyTab.buttonPressed(AbstractCPropertyTab.java:269) at org.eclipse.cdt.ui.newui.AbstractCPropertyTab.access$0(AbstractCPropertyTab.java:266) at org.eclipse.cdt.ui.newui.AbstractCPropertyTab$1.widgetSelected(AbstractCPropertyTab.java:216) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.jface.window.Window.runEventLoop(Window.java:825) at org.eclipse.jface.window.Window.open(Window.java:801) at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:215) at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:54) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169) at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241) at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
i have the very same issue. Running Juno SR1 with cdt 8.1.1 on SLES 64bit. Appareantly the Issue also arises when adding a Diff Viewer to SVN which also does not get persistet.
Fixed on master (CDT 8.2).
*** Bug 319738 has been marked as a duplicate of this bug. ***
*** cdt git genie on behalf of Andrew Gvozdev *** bug 355488: Cannot delete variables from C/C++ build environment [*] http://git.eclipse.org/c/cdt/org.eclipse.cdt.git/commit/?id=6e5ac901f4c2d0af7882887dcf0ddff3cdcd6824
