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Eclipse 3.2 RC7 After upgrading from M6 to RC7 with an existing workspace, I was unable to open the Package Explorer. An exception occurred every time. Closing the view, restarting the workbench, and then reopening the view appears to have worked around the problem. When the view was failing to open, the following exception was displayed: java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:3358) at org.eclipse.swt.SWT.error(SWT.java:3297) at org.eclipse.swt.SWT.error(SWT.java:3268) at org.eclipse.swt.widgets.Widget.error(Widget.java:435) at org.eclipse.swt.widgets.Widget.checkParent(Widget.java:267) at org.eclipse.swt.widgets.Widget.<init>(Widget.java:141) at org.eclipse.swt.widgets.Item.<init>(Item.java:61) at org.eclipse.swt.widgets.TreeItem.<init>(TreeItem.java:193) at org.eclipse.swt.widgets.TreeItem.<init>(TreeItem.java:153) at org.eclipse.jface.viewers.TreeViewer.newItem(TreeViewer.java:593) at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:743) at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:722) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:696) at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:892) at org.eclipse.jface.viewers.AbstractTreeViewer.internalExpand(AbstractTreeViewer.java:1369) at org.eclipse.jface.viewers.AbstractTreeViewer.internalExpand(AbstractTreeViewer.java:1366) at org.eclipse.jface.viewers.AbstractTreeViewer.internalExpand(AbstractTreeViewer.java:1366) at org.eclipse.jface.viewers.AbstractTreeViewer.setSelectionToWidget(AbstractTreeViewer.java:2219) at org.eclipse.jface.viewers.StructuredViewer.setSelectionToWidget(StructuredViewer.java:1619) at org.eclipse.jface.viewers.AbstractTreeViewer.setSelectionToWidget(AbstractTreeViewer.java:2579) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$PackageExplorerProblemTreeViewer.setSelectionToWidget(PackageExplorerPart.java:409) at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1575) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.showInput(PackageExplorerPart.java:1335) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.editorActivated(PackageExplorerPart.java:1300) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.createPartControl(PackageExplorerPart.java:680) at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:332) at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:197) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:290) at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:525) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:140) at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268) at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65) at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:394) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1144) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:620) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:532) at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:562) at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:244) at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:815) at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:3267) at org.eclipse.ui.internal.WorkbenchPage.busySetPerspective(WorkbenchPage.java:957) at org.eclipse.ui.internal.WorkbenchPage.access$12(WorkbenchPage.java:941) at org.eclipse.ui.internal.WorkbenchPage$12.run(WorkbenchPage.java:3391) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:3389) at org.eclipse.ui.internal.PerspectiveBarContributionItem.select(PerspectiveBarContributionItem.java:123) at org.eclipse.ui.internal.PerspectiveBarContributionItem$1.widgetSelected(PerspectiveBarContributionItem.java:92) 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:928) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878) 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:92) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177) 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:585) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336) at org.eclipse.core.launcher.Main.basicRun(Main.java:280) at org.eclipse.core.launcher.Main.run(Main.java:977) at org.eclipse.core.launcher.Main.main(Main.java:952)
moving to platform. TreeViewers wants to create a tree item that has tree == null
Jared, by any chance, do you still have the workspace with which this could be reproduced? Investigate for 3.2.1
Sorry, no. All we have is the stack trace.
Boris if you are not planning to address this for 3.2.1 you should remove the tag. The release candidates start next week.
I don't have a reproducible case for this, but I opened a bug for what I think is the general problem. *** This bug has been marked as a duplicate of 154571 ***
