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Using the short-cut menu from the package explorer I went to turn off project specific compiler setting for a java project. Once I unchecked the box and clicked "yes" to the resulting prompt for a rebuild, I clicked "ok" and recieved the following error: java.lang.IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed. at org.eclipse.core.internal.preferences.EclipsePreferences.checkRemoved(EclipsePreferences.java:157) at org.eclipse.core.internal.preferences.EclipsePreferences.internalGet(EclipsePreferences.java:513) at org.eclipse.core.internal.preferences.EclipsePreferences.get(EclipsePreferences.java:364) at org.eclipse.ui.internal.preferences.WorkingCopyPreferences.internalGet(WorkingCopyPreferences.java:191) at org.eclipse.ui.internal.preferences.WorkingCopyPreferences.get(WorkingCopyPreferences.java:180) at org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock$Key.getStoredValue(OptionsConfigurationBlock.java:99) at org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock.getChanges(OptionsConfigurationBlock.java:664) at org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock.processChanges(OptionsConfigurationBlock.java:719) at org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock.performOk(OptionsConfigurationBlock.java:708) at org.eclipse.jdt.internal.ui.preferences.ComplianceConfigurationBlock.performOk(ComplianceConfigurationBlock.java:617) at org.eclipse.jdt.internal.ui.preferences.CompliancePreferencePage.performOk(CompliancePreferencePage.java:128) at org.eclipse.jface.preference.PreferenceDialog$11.run(PreferenceDialog.java:889) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:850) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:149) at org.eclipse.jface.preference.PreferenceDialog.okPressed(PreferenceDialog.java:869) at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.okPressed(FilteredPreferenceDialog.java:377) at org.eclipse.jface.preference.PreferenceDialog.buttonPressed(PreferenceDialog.java:230) at org.eclipse.jface.dialogs.Dialog$3.widgetSelected(Dialog.java:638) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:90) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1095) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3205) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2881) at org.eclipse.jface.window.Window.runEventLoop(Window.java:820) at org.eclipse.jface.window.Window.open(Window.java:796) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.ConfigureBuildPathAction.run(ConfigureBuildPathAction.java:64) at org.eclipse.jface.action.Action.runWithEvent(Action.java:499) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1095) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3205) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2881) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1924) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1888) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:348) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:165) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:341) at org.eclipse.core.launcher.Main.basicRun(Main.java:285) at org.eclipse.core.launcher.Main.run(Main.java:987) at org.eclipse.core.launcher.Main.main(Main.java:962)
Steps in I20061102-0010: - new Java project - context menu > Properties > Java Compiler - click "Enable project specific settings" (to check) - click Apply - click "Enable project specific settings" (to uncheck) - click Apply - click OK or click "Enable project specific settings" (to check)
*** This bug has been marked as a duplicate of 137398 ***
