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https://issues.jboss.org/browse/JBSEAM-4827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12614693#comment-12614693
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Marek Novotny commented on JBSEAM-4827:
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Hmm, just thinking why is there possible to produce NULL, this shouldn't be
passed away if there is no message in StatusMessage. Have you got a simple test
case for that?
Thanks for reporting.
> FacesMessages may trigger NPE in JSF code
> -----------------------------------------
>
> Key: JBSEAM-4827
> URL: https://issues.jboss.org/browse/JBSEAM-4827
> Project: Seam 2
> Issue Type: Bug
> Components: JSF Integration
> Affects Versions: 2.2.2.Final
> Reporter: Stephan Bublava
>
> FacesMessages.beforeRenderResponse() passes the return value of
> FacesMessages.toFacesMessage() to FacesContext.addMessage() without any
> checks.
> The problem is that toFacesMessage() may return null and
> FacesContext.addMessage() does not allow that. (See
> http://download.oracle.com/docs/cd/E17802_01/j2ee/javaee/javaserverfaces/2.0/docs/api/javax/faces/context/FacesContext.html#addMessage(java.lang.String,%20javax.faces.application.FacesMessage)
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