Diconファイルの補完機能で例えば <component class=" と入力した状態でCtrl + Spaceを押すとエラーが発生します。このエラーは、ダブルクォーテーションが２つ並んだ状態であれば発生しません。エラーが発生したのはKijimuna 1.1.2で、他のバージョンについては確認していません。エラー発生時のスタックは、以下のとおりです。

java.lang.NullPointerException
at org.seasar.kijimuna.ui.editor.contentassist.xml.XmlAssistProcessor.getXmlRegiton(XmlAssistProcessor.java:203)
at org.seasar.kijimuna.ui.editor.contentassist.xml.XmlAssistProcessor.computeCompletionProposals(XmlAssistProcessor.java:250)
at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1503)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:301)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$13(CompletionProposalPopup.java:298)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:261)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:256)
at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1352)
at org.eclipse.jface.text.source.SourceViewer.doOperation(SourceViewer.java:721)
at org.eclipse.ui.texteditor.ContentAssistAction$1.run(ContentAssistAction.java:82)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.texteditor.ContentAssistAction.run(ContentAssistAction.java:80)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:996)
at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:182)
at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:108)
at org.eclipse.core.commands.Command.execute(Command.java:311)
at org.eclipse.core.commands.ParameterizedCommand.execute(ParameterizedCommand.java:396)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:459)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:781)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:828)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:550)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:493)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:117)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:919)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:867)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:852)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:880)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:876)
at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1190)
at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3135)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3038)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:3751)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1656)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2756)
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: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)
at org.eclipse.core.launcher.Main.main(Main.java:948)