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https://issues.apache.org/jira/browse/MYFACES-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13933369#comment-13933369
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Gonçalo Manuel Cruchinho commented on MYFACES-3869:
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Hi Leonard. Your patch works for my case. The navigation is completed without
any errors. Thank you.
> Ids used by c:if, c:forEach and other facelet tags requires to be unique per
> facelet
> ------------------------------------------------------------------------------------
>
> Key: MYFACES-3869
> URL: https://issues.apache.org/jira/browse/MYFACES-3869
> Project: MyFaces Core
> Issue Type: Bug
> Components: JSR-314, JSR-344
> Reporter: Leonardo Uribe
> Assignee: Leonardo Uribe
>
> As part of MYFACES-3867, it was found in some cases where parts of the tree
> are changed by effect of a ui:include tag, the facelet tag ids used by c:if
> or c:forEach for example are not unique enough.
> The fix is apply the same logic used in
> DefaultFaceletContext.generateUniqueId(...), which is use a combination
> between a facelet hierarchy hashcode and the tagId, which is associated to
> the position of the tag in the page.
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