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https://issues.apache.org/jira/browse/WICKET-6217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrea Del Bene resolved WICKET-6217.
-------------------------------------
Resolution: Fixed
> Enclosure broken within Border/Panel
> ------------------------------------
>
> Key: WICKET-6217
> URL: https://issues.apache.org/jira/browse/WICKET-6217
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 7.4.0
> Reporter: Jonas
> Assignee: Andrea Del Bene
> Attachments: 6217.zip
>
>
> One of our Panels that use Enclosure within a Border no longer works on
> Wicket 7.4.0, while on 7.3.0 it worked fine. I've created a simple
> application that reproduces the problem (see attachment). The stack trace
> looks like this:
> java.lang.IllegalArgumentException: Argument 'markup' may not be null.
> at org.apache.wicket.util.lang.Args.notNull(Args.java:41)
> at org.apache.wicket.markup.MarkupStream.<init>(MarkupStream.java:65)
> at
> org.apache.wicket.markup.html.internal.Enclosure.getChild(Enclosure.java:136)
> at
> org.apache.wicket.markup.html.internal.Enclosure.isVisible(Enclosure.java:171)
> at org.apache.wicket.Component.determineVisibility(Component.java:4403)
> at org.apache.wicket.Component.isVisibleInHierarchy(Component.java:2152)
> at org.apache.wicket.Component.isStateless(Component.java:2069)
> at org.apache.wicket.Page$2.component(Page.java:481)
> at org.apache.wicket.Page$2.component(Page.java:477)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:144)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:162)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:162)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:123)
> at
> org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:968)
> ...
> Cheers,
> Jonas
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