Bugs item #1548029, was opened at 2006-08-29 00:01
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Category: extensions
Group: 1.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Ingram Chen (ingramchen)
Assigned to: Nobody/Anonymous (nobody)
Summary: AjaxTabbedPanel is broken (wicket-1.2.2)

Initial Comment:
   I upgrade latest 1.2.2 from 1.2.0, but
AjaxTabbedPanel is broken under
certain condition:

=====================================
ERROR - RequestCycle               - Cannot remove
[MarkupContainer [Component id = 1, page = <No Page>,
path = 1.Loop$LoopItem]] from null parent!
java.lang.IllegalStateException: Cannot remove
[MarkupContainer [Component id = 1, page = <No Page>,
path = 1.Loop$LoopItem]] from null parent!
    at wicket.Component.remove (Component.java:1475)
    at wicket.version.undo.Add.undo(Add.java:81)
    at
wicket.version.undo.ChangeList.undo(ChangeList.java:93)
    at
wicket.version.undo.UndoPageVersionManager.undo(UndoPageVersionManager.java
:217)
    at
wicket.version.undo.UndoPageVersionManager.getVersion(UndoPageVersionManager.java:167)
    at wicket.Page.getVersion(Page.java:586)
    at wicket.PageMap.get(PageMap.java:461)
    at wicket.Session.getPage (Session.java:418)
    at
wicket.request.compound.DefaultRequestTargetResolverStrategy.resolveRenderedPage(DefaultRequestTargetResolverStrategy.java:215)
    at
wicket.request.compound.DefaultRequestTargetResolverStrategy.resolve
(DefaultRequestTargetResolverStrategy.java:152)
    at
wicket.request.compound.AbstractCompoundRequestCycleProcessor.resolve(AbstractCompoundRequestCycleProcessor.java:48)
    at wicket.RequestCycle.step(RequestCycle.java :948)
    at wicket.RequestCycle.steps(RequestCycle.java:1040)
    at wicket.RequestCycle.request(RequestCycle.java:454)
....
=====================================

To reproduce this bug: link to a non-bookmarkable Page,
then 

click tab link -> refresh page -> click tab link again
-> refresh page -> ouch !

This bug is not found at 1.2.0 (i don't try 1.2.1)
the attachment is test for QuickStart. 

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