"Content Assist" does not complete normally on #{var.pr|[]}

Testcase:
1. EXECUTE: Create Seam project in War Configuration
2. EXECUTE: Open login.xhtml
3. EXECUTE: Add <h:commandButton action="" value="#

{actor.clearDirty[]}

"/>
4. EXECUTE: Ctrl+Space on #

{actor.clearDirty|[]}

(before [])
5. ASSERT: There are not any exceptions.

There is an error message: "Content Assist" did not complete normally. Please see the log for more information.
java.lang.NullPointerException
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.handleSetData(CompletionProposalPopup.java:716)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$24(CompletionProposalPopup.java:709)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$3.handleEvent(CompletionProposalPopup.java:505)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:947)
at org.eclipse.swt.widgets.Table.checkData(Table.java:811)
at org.eclipse.swt.widgets.Table.wmNotifyChild(Table.java:5882)
at org.eclipse.swt.widgets.Control.wmNotify(Control.java:4563)
at org.eclipse.swt.widgets.Composite.wmNotify(Composite.java:1581)
at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:4216)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3724)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:291)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1554)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:1753)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4351)
at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2179)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:261)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:189)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3760)
at org.eclipse.swt.widgets.Table.windowProc(Table.java:5025)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4351)
at org.eclipse.swt.internal.win32.OS.SendMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.SendMessage(OS.java:2921)
at org.eclipse.swt.widgets.Table.select(Table.java:2952)
at org.eclipse.swt.widgets.Table.setSelection(Table.java:4424)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.selectProposal(CompletionProposalPopup.java:1215)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.setProposals(CompletionProposalPopup.java:989)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$7(CompletionProposalPopup.java:949)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:421)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:404)
at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1588)
at org.eclipse.wst.sse.ui.internal.StructuredTextViewer.doOperation(StructuredTextViewer.java:390)
at org.jboss.tools.jst.jsp.jspeditor.JSPTextEditor$JSPStructuredTextViewer.doOperation(JSPTextEditor.java:627)