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https://issues.apache.org/struts/browse/WW-3311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=47008#action_47008
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Musachy Barroso commented on WW-3311:
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well, yes I would agree to check for null if they *can* be null, but they are
guaranteed to not be null by the framework (if you set them to null by hand,
then yes it will fail, it might break in other places as well)
> 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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