org.eclipse.jface.text.Assert$AssertionFailedException: null argument;

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org.eclipse.jface.text.Assert$AssertionFailedException: null argument;
at org.eclipse.jface.text.Assert.isNotNull(Assert.java:158)
at org.hibernate.eclipse.mapper.editors.HBMXMLHyperlinkDetector.(Unknown Source)
at org.hibernate.eclipse.mapper.editors.HBMXMLStructuredTextViewerConfiguration.getHyperlinkDetectors(Unknown Source)
at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:2517)
at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53)
at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:155)
at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:132)
at org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart.addSourcePage(XMLMultiPageEditorPart.java:210)
at org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart.createPages(XMLMultiPageEditorPart.java:278)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:609)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:384)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:223)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2362)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2295)
at org.eclipse.ui.internal.WorkbenchPage.access$9(WorkbenchPage.java:2287)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2273)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2268)
at org.tigris.subversion.subclipse.ui.actions.OpenRemoteFileAction$1.run(OpenRemoteFileAction.java:57)
at org.tigris.subversion.subclipse.ui.repository.RepositoryManager.run(RepositoryManager.java:373)
at org.tigris.subversion.subclipse.ui.actions.SVNAction$1.run(SVNAction.java:228)
at org.tigris.subversion.subclipse.ui.actions.SVNAction$2.run(SVNAction.java:237)
at org.tigris.subversion.subclipse.ui.actions.SVNAction.run(SVNAction.java:234)
at org.tigris.subversion.subclipse.ui.actions.OpenRemoteFileAction.execute(OpenRemoteFileAction.java:37)
at org.tigris.subversion.subclipse.ui.actions.SVNAction.run(SVNAction.java:58)
at org.tigris.subversion.subclipse.ui.repository.RepositoriesView.handleDoubleClick(RepositoriesView.java:476)
at org.tigris.subversion.subclipse.ui.repository.RepositoriesView.access$2(RepositoriesView.java:466)
at org.tigris.subversion.subclipse.ui.repository.RepositoriesView$10.doubleClick(RepositoriesView.java:366)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148)
at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:718)
at org.eclipse.jface.viewers.StructuredViewer.handleDoubleSelect(StructuredViewer.java:950)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1057)
at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:219)
at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:216)
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.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
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:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)

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