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https://issues.apache.org/jira/browse/WICKET-1430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Vaynberg resolved WICKET-1430.
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Resolution: Fixed
> Form processing throws NPE if button.onsubmit() moves the button or its
> parents out of the component hierarchy
> --------------------------------------------------------------------------------------------------------------
>
> Key: WICKET-1430
> URL: https://issues.apache.org/jira/browse/WICKET-1430
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.2
> Reporter: Igor Vaynberg
> Assignee: Igor Vaynberg
> Fix For: 1.3.3
>
>
> if button.onsubmit() takes the button out of hierarchy form processing
> breaks. the reason is that after onsubmit() of the button is ran wicket will
> call button.getform() which returns null because the button is out of the
> component hierarchy
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