[jira] [Commented] (FLEX-34226) TypeError when using a spark List with an empty dataProvider within an mx Form

["Constantin A. (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLEX-34226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14026401#comment-14026401 ] 

Constantin A. commented on FLEX-34226:
--------------------------------------

still a valid bug in 4.12.1

> TypeError when using a spark List with an empty dataProvider within an mx Form
> ------------------------------------------------------------------------------
>
>                 Key: FLEX-34226
>                 URL: https://issues.apache.org/jira/browse/FLEX-34226
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Spark: List
>    Affects Versions: Apache Flex 4.11.0
>         Environment: OS X
>            Reporter: Gareth Daniel Smith
>            Priority: Minor
>              Labels: easyfix, easytest
>         Attachments: empty-list-in-form-bug.zip
>
>
> I will attach an example that throws a TypeError because the item renderer is passed an object that is not an instance of Point.
> I suspect the dodgy code is here: https://github.com/apache/flex-sdk/blob/323882d8a2619046e3833ae5e7033e7d9a70b4a1/frameworks/projects/spark/src/spark/components/supportClasses/ListBase.as#L311
> Note that the mx List uses null instead of {} for the dummy element: https://github.com/apache/flex-sdk/blob/323882d8a2619046e3833ae5e7033e7d9a70b4a1/frameworks/projects/mx/src/mx/controls/listClasses/ListBase.as#L1475



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