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3.3 M5 Found a few of these in the log. It's on the second line of: IClasspathEntry classpathEntry= root.getRawClasspathEntry(); int entryKind= classpathEntry.getEntryKind(); org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException) at org.eclipse.swt.SWT.error(SWT.java:3478) at org.eclipse.swt.SWT.error(SWT.java:3401) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3467) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3107) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2264) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2228) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2103) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:457) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:452) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:101) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:146) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354) 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.equinox.launcher.Main.invokeFramework(Main.java:476) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:416) at org.eclipse.equinox.launcher.Main.run(Main.java:1124) at org.eclipse.equinox.launcher.Main.main(Main.java:1099) Caused by: java.lang.NullPointerException at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getPackageFragmentRoots(PackageExplorerContentProvider.java:291) at org.eclipse.jdt.ui.StandardJavaElementContentProvider.getChildren(StandardJavaElementContentProvider.java:178) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getChildren(PackageExplorerContentProvider.java:270) at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1283) at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:394) at org.eclipse.jdt.internal.ui.viewsupport.ProblemTreeViewer.getFilteredChildren(ProblemTreeViewer.java:205) at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:580) at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2448) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1788) at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:592) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1795) at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:592) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1763) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1719) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$PackageExplorerProblemTreeViewer.internalRefresh(PackageExplorerPart.java:260) at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1424) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1332) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$PackageExplorerProblemTreeViewer.preservingSelection(PackageExplorerPart.java:356) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1422) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1379) at org.eclipse.jdt.internal.ui.viewsupport.FilterUpdater$1.run(FilterUpdater.java:51) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123) ... 23 more
These appeared around the same time that I added a new Installed JRE and changed the default to the new one.
'null' isn't a valid return value according to the spec of IPackageFragmentRoot.getRawClasspathEntry(). A JME would be ok to be thrown when the classpath entry deosn't exist anymore.
*** This bug has been marked as a duplicate of bug 162104 ***