GNU bug report logs - #17373
24.3.50; match data is incorrect if there are too many groups

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Message #11 received at 17373 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>, 17373 <at> debbugs.gnu.org
Subject: RE: bug#17373: 24.3.50; match data is incorrect if there are too many
 groups
Date: Mon, 19 May 2014 06:48:16 -0700 (PDT)

> Yes, unfortunately Emacs currently has a limit of at most 256 groups of
> match data: one for the entire pattern, and 255 for parenthesized
> subpatterns.  If you go over the limit, the excess matches are silently
> discarded.  I don't see this limitation documented anywhere; it should
> be.  Or better yet, the limitation should be removed.

Good to know.  +1, to documenting it, at least.

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