Need some bug/version info

[David Kastrup]

Ralf Angeli <angeli at iwi.uni-sb.de> writes:

> [Copying to the AUCTeX mailing list as well.]
>
> * Stephen J. Turnbull (2005-02-02) writes:
>
>>>>>>> "Ralf" == Ralf Angeli <dev.null at iwi.uni-sb.de> writes:
>>
>>     Ralf> The backtrace I posted is not related to font locking.  It
>>     Ralf> seems to be a problem with shy groups in the regular
>>     Ralf> expressions.
>>
>> Most likely fixed in CVS, due out in 21.4.17 in a few days according
>> to the release manager.
>
> As we are about to release AUCTeX 11.55, we are in need of a
> workaround for 21.4.16.  David posted the following on the AUCTeX list
>
> (string-match "\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(\\(.\
>                \\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)\\)" "x")
>
> but didn't consider it a real and bullet-proof solution.

To be more exact: it is not a workaround but a preliminary for not
working around.  As such it is ugly.  And I have not even taken a look
at the respective XEmacs code, so it is guesswork at best whether or
not this code avoids or just hides a problem.

> As a last resort we could prevent the regexps triggering the
> segfault from being applied in XEmacs.

If a workaround like the above is considered workable, it would be
interesting to know how often it is to be applied: once per session,
once after any save-match-data, once per process
sentinel...  Presumably something like

(set-match-data (make-list 30 0))

would be more efficient, anyway.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum