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https://issues.apache.org/jira/browse/FLEX-33838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15608176#comment-15608176
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Nicklas Holmgren commented on FLEX-33838:
-----------------------------------------
I can confirm this bug exists in 4.6.0 and 4.5.1A aswell.
> TLF ContainerController.mouseDownHandler null object reference
> --------------------------------------------------------------
>
> Key: FLEX-33838
> URL: https://issues.apache.org/jira/browse/FLEX-33838
> Project: Apache Flex
> Issue Type: Bug
> Affects Versions: Apache Flex 4.10.0
> Reporter: Alexander Scheibe
> Labels: easytest, tlf
>
> The mouseDown handler of the flashx.textLayout.container.ContainerController
> may cause a null object reference error
> (here the code with original comments)
> {code}
> public function mouseDownHandler(event:MouseEvent):void
> {
> if (interactionManager && !event.isDefaultPrevented())
> {
> interactionManager.mouseDownHandler(event);
> // grab the focus - alternative is to listen to
> keyevents on the Application
> // is this necessary?
> if (interactionManager.hasSelection())
> setFocus();
> }
> }
> {code}
> The error occurs in the line interactionManager.hasSelection() because
> interactionManager.mouseDownHandler(event) may cause the textFlow to become
> null and therefore the interactionManager can be null in that line.
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