Bug 118423 [build path] Exception thrown in New Java Project Wizard
Create a new Java Project. On the first page of the wizard select Create Project from existing source. Specify an existing project. Click Next. Note that there are lots of file in the package explorer widget. Click the back button. Note in the Error Log that there are Internal Errors listed. This is important to us because we are using the JavaCapabilityConfigurationPage in our own wizards but are adding content to the project. This error is therefore always exposed to our users. Java Model Exception: Java Model Status [z does not exist] at org.eclipse.jdt.internal.core.JavaElement.newNotPresentException(JavaElement.java:468) at org.eclipse.jdt.internal.core.JavaModelManager.getPerProjectInfoCheckExistence(JavaModelManager.java:1223) at org.eclipse.jdt.internal.core.JavaProject.getPerProjectInfo(JavaProject.java:1785) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1923) at org.eclipse.jdt.internal.core.PackageFragmentRoot.getRawClasspathEntry(PackageFragmentRoot.java:592) at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.isExcluded(ClasspathModifier.java:996) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorer$PackageLabelProvider.getText(DialogPackageExplorer.java:176) at org.eclipse.jface.viewers.DecoratingLabelProvider.getText(DecoratingLabelProvider.java:118) at org.eclipse.jface.viewers.DecoratingLabelProvider.updateLabel(DecoratingLabelProvider.java:208) at org.eclipse.jface.viewers.StructuredViewer.buildLabel(StructuredViewer.java:1855) at org.eclipse.jface.viewers.TreeViewer.doUpdateItem(TreeViewer.java:228) at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:85) at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044) at org.eclipse.core.runtime.Platform.run(Platform.java:783) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148) at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:621) at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:434) at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044) at org.eclipse.core.runtime.Platform.run(Platform.java:783) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148) at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:1763) at org.eclipse.jface.viewers.StructuredViewer.internalUpdate(StructuredViewer.java:1746) at org.eclipse.jface.viewers.StructuredViewer.update(StructuredViewer.java:1697) at org.eclipse.jface.viewers.StructuredViewer.update(StructuredViewer.java:1651) at org.eclipse.jface.viewers.StructuredViewer.handleLabelProviderChanged(StructuredViewer.java:1007) at org.eclipse.jface.viewers.ContentViewer$1.labelProviderChanged(ContentViewer.java:74) at org.eclipse.ui.internal.decorators.DecoratorManager$1.run(DecoratorManager.java:235) at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044) at org.eclipse.core.runtime.Platform.run(Platform.java:783) at org.eclipse.ui.internal.decorators.DecoratorManager.fireListener(DecoratorManager.java:233) at org.eclipse.ui.internal.decorators.DecorationScheduler$3.runInUIThread(DecorationScheduler.java:475) at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:93) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3057) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2716) at org.eclipse.jface.window.Window.runEventLoop(Window.java:809) at org.eclipse.jface.window.Window.open(Window.java:787) at org.eclipse.ui.actions.NewProjectAction.run(NewProjectAction.java:114) at org.eclipse.jface.action.Action.runWithEvent(Action.java:996) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:538) 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:843) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3080) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2713) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163) 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:324) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334) at org.eclipse.core.launcher.Main.basicRun(Main.java:278) at org.eclipse.core.launcher.Main.run(Main.java:973) at org.eclipse.core.launcher.Main.main(Main.java:948)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/newsourcepage/DialogPackageExplorer.java
public PackageContentProvider() {
            super();
        }
        
        /**
         * Get the elements of the current project
         * 
         * @param element the element to get the children from, will
         * not be used, instead the project childrens are returned directly
         * @return returns the children of the project
         */
        public Object[] getElements(Object element) {
            if (fCurrJProject == null)
                return new Object[0];
            return new Object[] {fCurrJProject};
        }
        
        /**
         * Get the children of the current <code>element</code>. If the
         * element is of type <code>IPackageFragmentRoot</code> and
         * displaying the output folders is selected, then an icon for
         * the output folder is created and displayed additionally.
         * 
         * @param element the current element to get the children from
         * @return an array of children
         */
        public Object[] getChildren(Object element) {
            Object[] children= super.getChildren(element);