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[188.150.165.235]) by smtp.gmail.com with ESMTPSA id b15-20020ac2562f000000b004f8555f7aa1sm583899lff.52.2023.06.17.01.39.16 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 17 Jun 2023 01:39:17 -0700 (PDT) In-Reply-To: <87sfaqwpmz.fsf@linux-m68k.org> X-Mailer: Apple Mail (2.3654.120.0.1.15) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:263515 Archived-At: 17 juni 2023 kl. 08.48 skrev Andreas Schwab : >>> - (:match "\\`?[#\"'`:?]" @char)) >>> + (:match "\\`\\?[#\"'`:?]" @char)) >>=20 >> I don't mind, but it seems like both versions do the same thing: Interesting! Now as Andreas says, > This depends on `?' being treated as an ordinary character if occuring > in a context where the special meaning does not make sense, which is > poor practice. which is quite right and that `?` should indeed be escaped for style = reasons if nothing else. However there appears to be a hitherto unknown parsing bug in the Emacs = regexp parser here. (And in xr, which has the ambition to be mostly bug-compatible with = Emacs.) I'll open a new bug about it.