> From: Stefan Monnier <monn...@iro.umontreal.ca>
> Cc: rpl...@gmail.com,  23...@debbugs.gnu.org,  alex.ben...@linaro.org,  
> jwieg...@gmail.com,  nljlistb...@gmail.com
> Date: Tue, 19 Jul 2016 12:03:51 -0400
> I guess the next best thing is:
> - copy search_regs.start and search_regs.end before calling replace_range.
> - use that copy when adjusting the match data.
> Or equivalently, use save-match-data.  IOW go back to your original patch.
> Duh!

Do we care that using save-match-data in every call to replace-match
might mean a performance hit?  If it will, then this will again punish
most of the users for the benefit of those few who (1) have
buffer-modification hooks, and (2) those hooks call save-match-data.

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