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I20080930-0921 + fix for bug 249321 1. New workspace 2. New Java Project 3. Edit .classpath to add a ".." lib entry (pointing at an existing library), e.g. <classpathentry kind="lib" path="../../test/JUnit "/> 4. In Package Explorer, select the library under Referenced Library 5. Build path > Remove from buildpath Observe: You get the following exception in the .log: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.RangeCheck(ArrayList.java:546) at java.util.ArrayList.get(ArrayList.java:321) at org.eclipse.jdt.internal.corext.buildpath.CPJavaProject.getJavaProject(CPJavaProject.java:77) at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.commitClassPath(ClasspathModifier.java:1058) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.RemoveFromBuildpathAction$1.run(RemoveFromBuildpathAction.java:153) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:446) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:354) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507) at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275) at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1191) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.RemoveFromBuildpathAction.run(RemoveFromBuildpathAction.java:173) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3848) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3446) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:333) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:370) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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.equinox.launcher.Main.invokeFramework(Main.java:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236) at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
The problem is not because of the ".." library. I got this exception because this was the last entry in my .classpath file.
So the exact steps are: 1. New workspace 2. New Java Project 3. Edit .classpath to remove existing entries 4. Add a ".." lib entry (pointing at an existing library), e.g. <classpathentry kind="lib" path="../../test/JUnit "/> 5. In Package Explorer, select the library under Referenced Library 6. Build path > Remove from buildpath Observe: You get the IOOBE
Fixed in HEAD. Available in builds > N20081001-2000.
Verified in 3.5 RC1.
