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From "Justin Mclean (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLEX-23781) Error #1009 after assigning null to mx:Image source property
Date Tue, 23 Apr 2013 22:13:16 GMT

    [ https://issues.apache.org/jira/browse/FLEX-23781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13639703#comment-13639703
] 

Justin Mclean commented on FLEX-23781:
--------------------------------------

Confirmed still an issue in Apache Flex 4.9.1
                
> Error #1009 after assigning null to mx:Image source property
> ------------------------------------------------------------
>
>                 Key: FLEX-23781
>                 URL: https://issues.apache.org/jira/browse/FLEX-23781
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: mx: Image
>    Affects Versions: Adobe Flex SDK 4.0 (Release)
>         Environment: Affected OS(s): Mac
> Affected OS(s): Mac OS 10.6
> Browser: Safari
> Language Found: English
>            Reporter: Adobe JIRA
>            Assignee: Justin Mclean
>            Priority: Minor
>              Labels: easyfix, easytest
>
> Steps to reproduce:
> 1. Compile a debug build of attached Main.mxml
> 2. Start fdb and listen for debugging session.
> 3. Open swf in a web browser (e.g. Safari).
> 4. Click "Click me!" button.
> Actual Results:
> No errors.
>  
> Expected Results:
> [RTE]
> TypeError: Error #1009: Cannot access a property or method of a null object reference.

>         at mx.controls::SWFLoader/contentHolder_addedHandler()[E:\dev\4.x\frameworks\projects\framework\src\mx\controls\SWFLoader.as:2543]

> [/RTE]
> Error #1009 has occurred:
> [Fault] exception, information=TypeError: Error #1009: Cannot access a property or method
of a null object reference.
> Execution halted in 'Main.swf' at 0xffffffff (-1)
> (fdb) bt
> #0   this = [Object 610014329, class='mx.controls::Image'].SWFLoader/contentHolder_addedHandler(_arg1=[Object
474409377, class='flash.events::Event']) at <null>:0
> --
> I suspect that in mx:SWFLoader.unloadContent(), contentHolder is not a Loader and the
contentHolder_addedHandler listener is not removed. Hence if Event.ADDED is dispatched when
contentHolder is null, the last line in contentHolder_addedHandler causes the #1009 error.
> This was working at Flex 4 Beta 1.
> Workaround:
> Since we're using embedded images in this case, we can use s:BitmapImage instead of mx:Image
(which subclasses SWFLoader):
> <s:BitmapImage id="sample1" />

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