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https://issues.apache.org/jira/browse/TAP5-2330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014489#comment-14014489
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Thiago H. de Paula Figueiredo commented on TAP5-2330:
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Thanks for the test, Jochen! I've used it in this fix. :-)
> NullPointerException when updating a Zone with no clientId
> ----------------------------------------------------------
>
> Key: TAP5-2330
> URL: https://issues.apache.org/jira/browse/TAP5-2330
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core, tapestry-json
> Affects Versions: 5.4
> Reporter: Jochen Kemnade
> Priority: Critical
> Attachments: 0001-add-test-for-TAP5-2330.patch
>
>
> If a Zone update is performed via AjaxResponseRenderer and the Zone has no id
> parameter, the RenderCommand creates a JSONArray with null as its first
> element. If assertions are disabled for the JVM, this leads to a
> NullPointerException in JSONObject.printValue(JSONPrintSession, Object).
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