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https://issues.apache.org/jira/browse/TAP5-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738397#comment-14738397
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ASF subversion and git services commented on TAP5-2500:
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Commit c4202982a11925b656e595cce4a276530e9c47d7 in tapestry-5's branch
refs/heads/master from [~jkemnade]
[ https://git-wip-us.apache.org/repos/asf?p=tapestry-5.git;h=c420298 ]
TAP5-2500: throw an exception if the Label component cannot retrieve the
Field's client id
> Label broken when inside zone and attached to a Field after that zone
> ---------------------------------------------------------------------
>
> Key: TAP5-2500
> URL: https://issues.apache.org/jira/browse/TAP5-2500
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.4
> Reporter: I D
>
> This is just one example, since the same problem is observed for
> TriggerFrament inside a zone when used in conjunction with a FormFragment
> outside the zone (and after it).
> {code:xml}
> <t:zone t:id="myZone">
> <t:label for="myField">Label</t:label>
> </t:zone>
> <t:textfield t:id="myField"/>
> {code}
> The reason this doesn't work is because Label.updateAttributes() uses
> @HeartbeatDeferred and assumes this invocation will be deferred until the end
> of the *page* render. Alas, since the label is inside a zone, which for some
> reason starts and ends its own heartbeat (nested within, and occluding, the
> page heartbeat), the invocation is deferred only until the end of the *zone*
> render, i.e. - too early.
> Apparently this bug was introduced in [this
> commit|https://github.com/apache/tapestry-5/commit/cc6fe5f3f85001eca4e0aa6a79c3bedc3e36b82c],
> which in turn was addressing
> [TAP5-940|https://issues.apache.org/jira/browse/TAP5-940].
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