[jira] [Updated] (FLEX-34371) how TagEncoder handles duplicate define* tags

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

     [ https://issues.apache.org/jira/browse/FLEX-34371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guest updated FLEX-34371:
-------------------------

    Attachment: test.swf

Here's a copy of the SWF generated by the swfutils.jar from Flex 4.12.1.

> how TagEncoder handles duplicate define* tags
> ---------------------------------------------
>
>                 Key: FLEX-34371
>                 URL: https://issues.apache.org/jira/browse/FLEX-34371
>             Project: Apache Flex
>          Issue Type: Bug
>    Affects Versions: Apache Flex 4.12.0
>            Reporter: Guest
>         Attachments: test.swf
>
>
> Suppose there are two DefineEditText tags that are the same by .equals, and a TagEncoder handles them. This writes them both to the SWF, but assigns them the same character ID. Adobe's Flash player can load the SWF fine, but it causes swfdump to crash with an exception like the following:
> {code}
> Exception in thread "main" java.lang.IllegalArgumentException: symbol 154 redefined by identical tag
>         at flash.swf.Dictionary.add(Dictionary.java:142)
>         at flash.swf.TagDecoder.decodeDefineEditText(TagDecoder.java:1160)
>         at flash.swf.TagDecoder.decodeTag(TagDecoder.java:319)
>         at flash.swf.TagDecoder.decodeTags(TagDecoder.java:194)
>         at flash.swf.TagDecoder.parse(TagDecoder.java:142)
>         at flash.swf.tools.SwfxPrinter.dumpSwf(SwfxPrinter.java:2318)
>         at flash.swf.tools.SwfxPrinter.main(SwfxPrinter.java:2225)
> {code}
> Actual result:
> defineEditText(tag) in TagEncoder calls
> {code:java}
> int id = dict.add(tag);
> {code}
> When serializing the second DefineEditText, the Dictionary finds the first one and returns its ID. Then, the defineEditText(tag) method writes the second copy with the first one's ID.
> Expected result:
> either
> - it writes the duplicate with a new ID or
> - it does not write anything and uses the first copy's ID for references to the second.



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