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build I20060125 + latest Platform UI from head - launch target - in Navigator view, select a file and pop up context menu - get: java.lang.NoClassDefFoundError: org.eclipse.core.commands.util.ListenerList at org.eclipse.compare.CompareConfiguration.<init>(CompareConfiguration.java:100) at org.eclipse.compare.CompareConfiguration.<init>(CompareConfiguration.java:143) at org.eclipse.compare.internal.CompareAction.isEnabled(CompareAction.java:43) at org.eclipse.compare.internal.BaseCompareAction.selectionChanged(BaseCompareAction.java:35) at org.eclipse.ui.internal.PluginAction.refreshEnablement(PluginAction.java:205) at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:276) at org.eclipse.ui.internal.ObjectActionContributor.contributeObjectActions(ObjectActionContributor.java:138) at org.eclipse.ui.internal.ObjectActionContributorManager.contributeObjectActions(ObjectActionContributorManager.java:89) at org.eclipse.ui.internal.PopupMenuExtender.addObjectActions(PopupMenuExtender.java:253) at org.eclipse.ui.internal.PopupMenuExtender.menuAboutToShow(PopupMenuExtender.java:315) at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:285) at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:390) at org.eclipse.jface.action.MenuManager.access$1(MenuManager.java:387) at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:412) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:117) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:920) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:944) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925) at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:3527) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3243) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1538) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3965) at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method) at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:225) at org.eclipse.swt.widgets.Display.runPopups(Display.java:3313) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2901) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1790) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1754) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:400) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:106) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:109) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:93) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:69) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:374) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169) 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:338) at org.eclipse.core.launcher.Main.basicRun(Main.java:282) at org.eclipse.core.launcher.Main.run(Main.java:977)
Although the ref to ListenerList in CompareConfiguration was fixed and tagged v20060111, the released version of Compare in the map is v20051213.
*** This bug has been marked as a duplicate of 125379 ***