Usage of macro 'toc' combined with user macro on same page leads to parsing error, when user macro body contains header lines

[Joachim Simon]

With the following user macro the rendering of the page leads to the exception:

Fehler beim Rendern des Makros 'toc': com.ctc.wstx.exc.WstxLazyException com.ctc.wstx.exc.WstxParsingException: Duplicate attribute 'id'. at row,col {unknown-source} : 2,52

User macro:

## Macro title: My Macro

## Macro has a body: Y or N

## Body processing: Selected body processing option

## Output: Selected output option

##

## Developed by: My Name

## Date created: dd/mm/yyyy

## Installed by: My Name

## This is an example macro

## @noparams

$body

page content:

<ac:macro ac:name="toc"/>

Heading 1

<ac:macro ac:name="write-through"><ac:parameter ac:name="atlassian-macro-output-type">BLOCK</ac:parameter><ac:rich-text-body>

Heading 2

</ac:rich-text-body></ac:macro>

[hsuhailah]

Looks like you're hitting a known bug of TOC as tracked here: https://studio.plugins.atlassian.com/browse/TOC-127 & https://jira.atlassian.com/browse/CONF-25584

There's no available workaround at the moment I'm afraid. Please watch the bug report for future notification byt he development team.

[Joachim Simon]

Is it possible, that the rendering process is causing this problem, as it is performed twice? Once within the macro, a second time fro the entire page. Each time an 'id' attribute is added to the <h1> tag. The 'toc' then, using the standard XML parser runs into this error.

Maybe just changing the rendering process in a way, that it only adds an attribute, if it's not already there.

The other possible solution I can imagine, is to change the implementation of the 'toc' macro.

Anyway, what is the development team's plan for solving this?

BTW TOC-127 seems to be representing my problem exactly, but as <span>studio.plugins.atlassian.com will be decommissioned in early 2013, I won't be able to follow this one. CONF-25584 ist not exactly the thing, so where should I look for a solution then?