Bug 16956

Description Eduardo Pereira 2002-05-22 14:28:49 EDT

Change preferences to Open new persp. in a new window.
Close all perspectives.
Try to open the java perspective. 
Got the following NPE.

There are two problems here. 
 1) The NPE should not happen
 2) the UI should handle the exception better so the perspective should open 
without that menu option.

Copying this bug report to debug since there are two problems.

java.lang.NullPointerException
        at org.eclipse.debug.internal.ui.actions.LaunchWithConfigurationAction.g
etActivePerspectiveID(LaunchWithConfigurationAction.java:168)
        at org.eclipse.debug.internal.ui.actions.LaunchWithConfigurationAction.g
etMenu(LaunchWithConfigurationAction.java:106)
        at org.eclipse.jface.action.ActionContributionItem.fill(ActionContributi
onItem.java(Compiled Code))
        at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem
.java:45)
        at org.eclipse.jface.action.MenuManager.update(MenuManager.java(Compiled
 Code))
        at org.eclipse.jface.action.MenuManager.update(MenuManager.java:444)
        at org.eclipse.jface.action.MenuManager.fill(MenuManager.java:187)
        at org.eclipse.jface.action.SubMenuManager.fill(SubMenuManager.java:63)
        at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem
.java:45)
        at org.eclipse.jface.action.MenuManager.update(MenuManager.java(Compiled
 Code))
        at org.eclipse.jface.action.MenuManager.updateAll(MenuManager.java:575)
        at org.eclipse.ui.internal.WorkbenchWindow.updateActionBars(WorkbenchWin
dow.java:1342)
        at org.eclipse.ui.internal.WorkbenchWindow.updateActionSets(WorkbenchWin
dow.java:1360)
        at org.eclipse.ui.internal.WorkbenchWindow$7.run(WorkbenchWindow.java:11
63)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:56)

        at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow
.java:1137)
        at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.
java:342)
        at org.eclipse.ui.internal.Workbench.busyOpenWorkbenchWindow(Workbench.j
ava:224)
        at org.eclipse.ui.internal.Workbench.access$8(Workbench.java:217)
        at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:842)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:56)

        at org.eclipse.ui.internal.Workbench.openWorkbenchWindow(Workbench.java:
839)
        at org.eclipse.ui.internal.ChangeToPerspectiveMenu.run(ChangeToPerspecti
veMenu.java:44)
        at org.eclipse.ui.actions.PerspectiveMenu.run(PerspectiveMenu.java:305)
        at org.eclipse.ui.actions.PerspectiveMenu$2.widgetSelected(PerspectiveMe
nu.java:93)
        at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java(
Compiled Code))
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java(Compiled
 Code))
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java(Compiled Code))
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java(Compil
ed Code))
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java(Compiled
 Code))
        at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java(Compile
d Code))
        at org.eclipse.ui.internal.Workbench.run(Workbench.java:1068)
        at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoa
der.java:739)
        at org.eclipse.core.boot.BootLoader.run(BootLoader.java:462)
        at java.lang.reflect.Method.invoke(Native Method)
        at org.eclipse.core.launcher.Main.basicRun(Main.java:200)
        at org.eclipse.core.launcher.Main.run(Main.java:643)
        at org.eclipse.core.launcher.Main.main(Main.java:476)
java.lang.NullPointerException