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https://issues.apache.org/struts/browse/WW-3311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=47004#action_47004
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Musachy Barroso commented on WW-3311:
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how can the parameters be null? I thought that was no possible
> NullPointerException in CheckboxInterceptor when parameters are null
> --------------------------------------------------------------------
>
> Key: WW-3311
> URL: https://issues.apache.org/struts/browse/WW-3311
> Project: Struts 2
> Issue Type: Bug
> Components: Core Interceptors
> Affects Versions: 2.1.6
> Environment: Struts 2.1.6, but no changes in 2.1.8
> Reporter: Cimballi
> Fix For: 2.2.0
>
>
> There is a NullPointerException in the CheckboxInterceptor when parameters
> are null at the following line :
> Set<Map.Entry> entries = parameters.entrySet();
> I don't know if "theorically" it should check or not for null parameters, but
> the XWork interceptors check it, so I think Struts2 interceptors should also
> check for null parameters.
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