Subject: Re: bug#29343: Match data doesn't contain elements for trailing non-matched subgroups

From: Lars Ingebrigtsen <[email-masked]>
Date: Sat, 29 Jan 2022 16:40:05 +0100

Philipp Stephani <[email-masked]> writes:

> It turns out that this is harder than I expected, because the
> information about the number of groups in the pattern isn't stored
> anywhere, and search_regs.num_regs may be different from the group
> count. If it turns out too hard to fix, the behavior should at least
> be documented.

I've now mentioned this in the doc string in Emacs 29.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no