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From "Justin Mclean (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLEX-34371) how TagEncoder handles duplicate define* tags
Date Tue, 08 Jul 2014 02:42:34 GMT

    [ https://issues.apache.org/jira/browse/FLEX-34371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054445#comment-14054445

Justin Mclean commented on FLEX-34371:

Do previous version of Flex such as Adobe Flex 4.6 give the same issue? Just want to know
if it's a regression issue or not.

> 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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