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https://issues.apache.org/jira/browse/FLEX-28913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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tom chiverton updated FLEX-28913:
---------------------------------
Attachment: SparkAlert.mxml
Works as expected in SDK 4.9.1 - clicking the button changes the List height
without exception.
> Scroller's snapElement needs additional check for null dataprovider
> -------------------------------------------------------------------
>
> Key: FLEX-28913
> URL: https://issues.apache.org/jira/browse/FLEX-28913
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: Scroller
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Labels: easyfix, easytest
> Attachments: SparkAlert.mxml
>
>
> Found in Adobe ThRead. This occurs when resizing a list with no elements (or
> dataprovider=null) + scrollsnapping enabled.
>
> Actual Results:
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
> at
> spark.components::Scroller/http://www.adobe.com/2006/flex/mx/internal::snapElement()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\Scroller.as:1518]
> at
> spark.components::Scroller/checkScrollPosition()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\Scroller.as:1750]
> at
> spark.components::Scroller/handleSizeChange()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\Scroller.as:1766]
> at
> spark.components::Scroller/handleSizeChangeOnUpdateComplete()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\Scroller.as:2048]
> at flash.events::EventDispatcher/dispatchEventFunction()
> at flash.events::EventDispatcher/dispatchEvent()
> at
> mx.core::UIComponent/dispatchEvent()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:13152]
> at
> mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:844]
> at
> mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1180]
> at flash.utils::Timer/_timerDispatch()
> at flash.utils::Timer/tick()
>
> Expected Results:
>
>
> Workaround (if any):
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