GNU bug report logs - #31492
26.1; query-replace-regexp undo fails in regexps w/o printable chars

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Message #8 received at 31492 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Tino Calancha <tino.calancha <at> gmail.com>
Cc: 31492 <at> debbugs.gnu.org
Subject: Re: bug#31492: 26.1;
 query-replace-regexp undo fails in regexps w/o printable chars
Date: Fri, 18 May 2018 17:16:01 +0300

> From: Tino Calancha <tino.calancha <at> gmail.com>
> Date: Fri, 18 May 2018 22:27:36 +0900
> 
> emacs -Q
> 
> < C-M-% \b RET foo RET TAB TAB TAB
> U ; undo all replacements
> ;; Nothing is undid :-(

I'm probably missing something, because I cannot reproduce the problem
(and therefore don't understand the solution).  When I repeat what you
show above, I get "replaced 0 occurrences", and therefore there's
nothing to undo in the first place...

I guess the explanation is in what does "<" mean and, more
importantly, what did you actually type instead of "\b".

Or maybe some command is missing before the recipe begins?

TIA

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