From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Kevin W. Currey" Newsgroups: gmane.emacs.bugs Subject: bug#19025: 24.4; precision error when adding two floats Date: Tue, 11 Nov 2014 19:36:39 -0500 Message-ID: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="_d1d2cd7a-f2d6-4b97-a5fc-e39bdbee79ac_" X-Trace: ger.gmane.org 1415755536 27719 80.91.229.3 (12 Nov 2014 01:25:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 12 Nov 2014 01:25:36 +0000 (UTC) To: 19025@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Nov 12 02:25:28 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XoMga-0004oL-GH for geb-bug-gnu-emacs@m.gmane.org; Wed, 12 Nov 2014 02:25:28 +0100 Original-Received: from localhost ([::1]:51829 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoMgZ-0005xT-OC for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Nov 2014 20:25:27 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:49585) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoMgK-0005w9-WA for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 20:25:22 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XoMgA-0004fJ-UE for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 20:25:12 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:60748) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoMgA-0004et-PZ for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 20:25:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XoMgA-0003pc-Ez for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 20:25:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: "Kevin W. Currey" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 12 Nov 2014 01:25:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 19025 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: "bug-gnu-emacs@gnu.org" Original-Received: via spool by submit@debbugs.gnu.org id=B.141575546214677 (code B ref -1); Wed, 12 Nov 2014 01:25:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 12 Nov 2014 01:24:22 +0000 Original-Received: from localhost ([127.0.0.1]:57961 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XoMfV-0003oe-GU for submit@debbugs.gnu.org; Tue, 11 Nov 2014 20:24:22 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:40081) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XoLvm-0002QM-Jy for submit@debbugs.gnu.org; Tue, 11 Nov 2014 19:37:07 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XoLvc-0004dx-Ia for submit@debbugs.gnu.org; Tue, 11 Nov 2014 19:37:06 -0500 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:43302) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoLvc-0004dr-F8 for submit@debbugs.gnu.org; Tue, 11 Nov 2014 19:36:56 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41724) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoLvU-0000kf-Qv for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 19:36:56 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XoLvN-0004ac-7H for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 19:36:48 -0500 Original-Received: from blu004-omc1s14.hotmail.com ([65.55.116.25]:58915) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XoLvN-0004aN-22 for bug-gnu-emacs@gnu.org; Tue, 11 Nov 2014 19:36:41 -0500 Original-Received: from BLU173-W24 ([65.55.116.9]) by BLU004-OMC1S14.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.22751); Tue, 11 Nov 2014 16:36:40 -0800 X-TMN: [C+JyY6c02cwC1Epj55I83Rd4doADuzO2] X-Originating-Email: [kevalier68@hotmail.com] Importance: Normal X-OriginalArrivalTime: 12 Nov 2014 00:36:40.0364 (UTC) FILETIME=[B996E6C0:01CFFE10] X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Mailman-Approved-At: Tue, 11 Nov 2014 20:24:20 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:95887 --_d1d2cd7a-f2d6-4b97-a5fc-e39bdbee79ac_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable (message "%s" (+ 379.744 57.93)) The above prints 437.67400000000004. Same if I use 57.930=2C but if I use = 57.931 (below) I get the correct answer 437.675. =20 (message "%s" (+ 379.744 57.931)) I was able to work around by using format: =20 (message "%s" (format "%f" (+ 379.744 57.93))) which prints 437.674000. =20 FYI=2C I can replicate the issue with Emacs 21.3.1. =20 Thanks=2C -Kevin =20 =20 In GNU Emacs 24.4.1 (x86_64-unknown-cygwin) of 2014-10-21 on desktop-new Windowing system distributor `Microsoft Corp.'=2C version 6.1.7601 Configured using: `configure --srcdir=3D/home/kbrown/src/cygemacs/emacs-24.4-1.x86_64/src/emacs-24.4 --prefix=3D/usr --exec-prefix=3D/usr --bindir=3D/usr/bin --sbindir=3D/usr/= sbin --libexecdir=3D/usr/libexec --datadir=3D/usr/share --localstatedir=3D/var --sysconfdir=3D/etc --libdir=3D/usr/lib --datarootdir=3D/usr/share --docdir=3D/usr/share/doc/emacs --htmldir=3D/usr/share/doc/emacs/html -C --with-w32 --without-file-notification --enable-checking 'CFLAGS=3D-ggdb -O2 -pipe -Wimplicit-function-declaration -Og -g3 -fdebug-prefix-map=3D/home/kbrown/src/cygemacs/emacs-24.4-1.x86_64/build= =3D/usr/src/debug/emacs-24.4-1 -fdebug-prefix-map=3D/home/kbrown/src/cygemacs/emacs-24.4-1.x86_64/src/ema= cs-24.4=3D/usr/src/debug/emacs-24.4-1' CPPFLAGS=3D LDFLAGS=3D' =20 =20 Important settings: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix =20 =20 Major mode: Fundamental =20 =20 Minor modes in effect: shell-dirtrack-mode: t display-time-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t line-number-mode: t Recent messages: Load-path shadows: None found. =20 =20 Features: (pp shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils info find-func grep tabify sh-script smie executable shell pcomplete compile comint ansi-color ring dabbrev cc-langs cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs arc-mode archive-mode dired-aux ispell apropos dired help-fns help-mode easymenu mule-util server edmacro kmacro cl-loaddefs cl-lib time jka-compr time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process dbusbind w32 multi-tty emacs) =20 =20 Memory information: ((conses 16 145217 10616) (symbols 48 23227 0) (miscs 40 133 446) (strings 32 31064 5702) (string-bytes 1 930985) (vectors 16 15771) (vector-slots 8 452262 7494) (floats 8 82 775) (intervals 56 640 31) (buffers 960 24)) = --_d1d2cd7a-f2d6-4b97-a5fc-e39bdbee79ac_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
(message "%s" (+ 379.744 57.93))=

The above prints 437.67400000000004. =3B Same if I use 57.930= =2C but if I use =3B57.931 (below) I get the correct answer 437.675. =3B
(message "%s" (+ 379.744 57.931))

I was able to work ar= ound by using format:
 =3B
(message "%s" (format "%f" (+ 379.744 = 57.93)))

which prints 437.674000.
 =3B
FYI=2C I can replic= ate the issue with Emacs 21.3.1.
 =3B
Thanks=2C
-Kevin
&nbs= p=3B
 =3B
In GNU Emacs 24.4.1 (x86_64-unknown-cygwin)
 =3B= of 2014-10-21 on desktop-new
Windowing system distributor `Microsoft Cor= p.'=2C version 6.1.7601
Configured using:
 =3B`configure
 = =3B--srcdir=3D/home/kbrown/src/cygemacs/emacs-24.4-1.x86_64/src/emacs-24.4<= br> =3B--prefix=3D/usr --exec-prefix=3D/usr --bindir=3D/usr/bin --sbind= ir=3D/usr/sbin
 =3B--libexecdir=3D/usr/libexec --datadir=3D/usr/shar= e --localstatedir=3D/var
 =3B--sysconfdir=3D/etc --libdir=3D/usr/lib= --datarootdir=3D/usr/share
 =3B--docdir=3D/usr/share/doc/emacs --ht= mldir=3D/usr/share/doc/emacs/html -C
 =3B--with-w32 --without-file-n= otification --enable-checking 'CFLAGS=3D-ggdb
 =3B-O2 -pipe -Wimplic= it-function-declaration -Og -g3
 =3B-fdebug-prefix-map=3D/home/kbrow= n/src/cygemacs/emacs-24.4-1.x86_64/build=3D/usr/src/debug/emacs-24.4-1
&= nbsp=3B-fdebug-prefix-map=3D/home/kbrown/src/cygemacs/emacs-24.4-1.x86_64/s= rc/emacs-24.4=3D/usr/src/debug/emacs-24.4-1'
 =3BCPPFLAGS=3D LDFLAGS= =3D'
 =3B
 =3B
Important settings:
 =3B value of $L= ANG: en_US.UTF-8
 =3B locale-coding-system: utf-8-unix
 =3B =3B
Major mode: Fundamental
 =3B
 =3B
Minor mode= s in effect:
 =3B shell-dirtrack-mode: t
 =3B display-time-mo= de: t
 =3B mouse-wheel-mode: t
 =3B file-name-shadow-mode: t<= br> =3B global-font-lock-mode: t
 =3B font-lock-mode: t
 = =3B blink-cursor-mode: t
 =3B line-number-mode: t

Recent mess= ages:
Load-path shadows:
None found.
 =3B
 =3B
Featu= res:
(pp shadow sort gnus-util mail-extr emacsbug message format-spec rf= c822
mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailab= brev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-utilmail-prsvr mail-utils info find-func grep tabify sh-script smie
executa= ble shell pcomplete compile comint ansi-color ring dabbrev
cc-langs cc-m= ode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align
cc-engine cc-v= ars cc-defs arc-mode archive-mode dired-aux ispell apropos
dired help-fn= s help-mode easymenu mule-util server edmacro kmacro
cl-loaddefs cl-lib = time jka-compr time-date tooltip electric uniquify
ediff-hook vc-hooks l= isp-float-type mwheel w32-common-fns disp-table
w32-win w32-vars tool-ba= r dnd fontset image regexp-opt fringe
tabulated-list newcomment lisp-mod= e prog-mode register page menu-bar
rfn-eshadow timer select scroll-bar m= ouse jit-lock font-lock syntax
facemenu font-core frame cham georgian ut= f-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese = hebrew greek romanian slovak
czech european ethiopic indian cyrillic chi= nese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer nad= vice loaddefs button
faces cus-face macroexp files text-properties overl= ay sha1 md5 base64
format env code-pages mule custom widget hashtable-pr= int-readable
backquote make-network-process dbusbind w32 multi-tty emacs= )
 =3B
 =3B
Memory information:
((conses 16 145217 1061= 6)
 =3B(symbols 48 23227 0)
 =3B(miscs 40 133 446)
 = =3B(strings 32 31064 5702)
 =3B(string-bytes 1 930985)
 =3B(v= ectors 16 15771)
 =3B(vector-slots 8 452262 7494)
 =3B(floats= 8 82 775)
 =3B(intervals 56 640 31)
 =3B(buffers 960 24))
= --_d1d2cd7a-f2d6-4b97-a5fc-e39bdbee79ac_--