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

[Gareth Daniel Smith (JIRA)]

Gareth Daniel Smith created FLEX-34226:
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             Summary: 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


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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