From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stephen Berman Newsgroups: gmane.emacs.bugs Subject: bug#64441: 29.0.92; elisp arithmetic error at ielm prompt Date: Mon, 03 Jul 2023 18:50:58 +0200 Message-ID: <878rbx547h.fsf@gmx.net> References: <202307031620.363GKYEA003729@sdf.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10721"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: van.ly@sdf.org To: 64441@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 03 18:52:22 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qGMmk-0002VZ-6W for geb-bug-gnu-emacs@m.gmane-mx.org; 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a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=s31663417; t=1688403059; x=1689007859; i=stephen.berman@gmx.net; bh=5wKs7kcbmoyHQjzOeOlt7CdI2YE6PX9hZzxOSvCoTvA=; h=X-UI-Sender-Class:From:To:Cc:Subject:In-Reply-To:References:Date; b=VdPxtYMwZZUh+LC1Ly/EvoKlY7coQ4U6HokBIUnTaixhSXvMeJBc4Y4jzmASDlTHLad0x5j V01tZpWD36pIDE2sYXRXXdsIur02MMow4Qt6vpO50TQQ1ef9PKZm7jlhC3QlTEQBVj5oq1JRZ dXL2BLDgx2I77tjsV+OSFMoe1ICeBJKBx2WOfGLkodboPCwLfd14jlKnKmwLHsD+6GozVyS3v iOdD7D/ReQUlMd/o2tTrMrM2A00cZy+ztLJnSIPj/4Qn1m9teCVTvGqTfOWZ1G1pFvQN7B7gz Dgp8qSsvsdtvAS7B7GPFHkoDNCX1I95RZLZyVbl8sph3D2SboSZg== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Original-Received: from strobelfssd ([94.134.196.66]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1N5mKJ-1pw1sm2bhD-017BvV; Mon, 03 Jul 2023 18:50:59 +0200 In-Reply-To: <202307031620.363GKYEA003729@sdf.org> (Van Ly via's message of "Mon, 3 Jul 2023 16:20:34 GMT") X-Provags-ID: V03:K1:oJA0wm/a8RThIyqHXuBzxp74FVxOyi9Be3KwwQtOyCX8OsV1IdO /74DQwNIo/iq4Z8IQI1y73R3beJh9zicWN/NQPXDHX3N9V87pkevOal1NWi3/frsOCdIHkX ba7NdaGh1TayybY2MuO7TIbe8gevumFOi9SwkZedKK7rGdnK7G+1VxAtCusyAms2/PJx769 4AryvMPvxcVa367c5dhtg== UI-OutboundReport: notjunk:1;M01:P0:bFn3HmPnYns=;JZbeVgPmGT8AbRBXLe2rvawfJrf w1RlFwhJeUyK0QMbc+Hy/SB17Yi3M6oP2rN1gOKiuXr80yr9aQ899eMni19d3Z/TNSLNlVuNr 72NZc3yZ6aSHaez7WozZ/ZGJY+IPk/GARy/kVGuNEinK1F4dBbsMs3opeRAdHIOO4YoFUrqpr KPnCu8X19rg1nA8tfQiidARnoIl4sUaypGELOmdoAACYN6ViXhMRsBylGmHADR+opV6ESEz+M SUB+LxOhTvnxuP4kJ8AswaTYXogUe2gXkNEwhQ2DNEN5zLxTGBLuK/XUwrpzzgwVWV8cNYZ/z VgNGQRofqI7gZm4YGrNgfRMk/cZN81eT+4NldviYeY4nRErhXeif7bN3sau/F0vylOcXec5jr 6Ye4Tt3XV+tmKEg0lGC/PfKYj0WyaDI/d0fAa95Ut/LB9DuMJcwGxqtdhGkCGJX30NKd3X7Ah saTe52ixb/LIOr97enrTM3yfe0SMsJvgs85cKQhrN/SU++qCyjxw5OTOz61MZBKjxBpuyhGml 7vLe0y+Ek1swGZzS2f4AAxTsNqbx51pWGLy67424OVji9AqKaLncsUtuWTl2IPwGkJpZkN7Ti k1bnvQvBmE0lEUXK08ZiDDXQPmhbJtEGBJXRzidMsBoJEOqdTLQzmqxeaAPkaMJjlzUibdOw5 WmEFUbVp8QEEeuIv14+pB+WlgPg1R8n45jF+MbqFi+v/olInVZ21KOVdly20ma8uPmIEEcKyp iD7nxsIDX9WJootATc3IYqVzIxoz4unY8mzI3XXq/0YQjuB8nuK+del68YhWxmAqwAi8x4I3 Received-SPF: pass client-ip=212.227.17.22; envelope-from=stephen.berman@gmx.net; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action 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:264535 Archived-At: On Mon, 3 Jul 2023 16:20:34 GMT Van Ly via "Bug reports for GNU Emacs, the = Swiss army knife of text editors" wrote: > Hello, > > The following calculation errors in elisp. > > ELISP> (/ (* (/ 3 4) (/ 7 13)) (/ 5 12)) > *** Eval error *** Arithmetic error > > The SBCL repl doesn't. > > CL-USER> (/ (* (/ 3 4) (/ 7 13)) (/ 5 12)) > 63/65 (0.9692308, 1260/13%) > > Steps to reproduce the error. > > 1. start using, 'emacs -Q' > 2. get to the ielm elisp prompt, 'M-x ielm' > 3. enter the above calculation `/' in Elisp is different from `/' in Common Lisp. (elisp) Arithmetic Operations: If all the arguments are integers, the result is an integer, obtained by rounding the quotient towards zero after each division. Hence (/ 3 4), (/ 7 13) and (/ 5 12) all evaluate to 0, and "If you divide an integer by the integer 0, Emacs signals an =E2=80=98arith-error= =E2=80=99 error". But in Common Lisp (http://www.lispworks.com/documentation/HyperSpec/Body/f_sl.htm): If each argument is either an integer or a ratio, and the result is not an integer, then it is a ratio. Hence (/ 3 4) =3D> 3/4, (/ 7 13) =3D> 7/13 and (/ 5 12) =3D> 5/12 Steve Berman