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Hermes SMTP Server) with ESMTPA ID fd0a0b8d1cf950ad5fb02ebe93ea7f42; Wed, 05 Oct 2022 11:15:29 +0000 (UTC) In-Reply-To: ("Gerd =?UTF-8?Q?M=C3=B6llmann?="'s message of "Wed, 05 Oct 2022 13:10:03 +0200") X-Mailer: WebService/1.1.20702 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo 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" Xref: news.gmane.io gmane.emacs.bugs:244516 Archived-At: Gerd M=C3=B6llmann writes: > Can somone please help me understand how this works? > > Let's say we are in memq called for list L. Fmemq uses FOR_EACH_TAIL, > which can call maybe_quit, which executes arbitrary Lisp, which can > modify L. And probably similarly in another 100 places. > > I don't get it. AFAIU if it is particularly dangerous to modify L there, then input should be blocked around Fmemq.