Package: emacs;
Reported by: Tom Tromey <tom <at> tromey.com>
Date: Thu, 6 Nov 2014 02:47:01 UTC
Severity: minor
Found in version 25.0.50
Done: Stefan Monnier <monnier <at> iro.umontreal.ca>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Tom Tromey <tom <at> tromey.com> To: 18968 <at> debbugs.gnu.org Subject: bug#18968: 25.0.50; unhelpful "unused" warning from byte compiler Date: Wed, 05 Nov 2014 19:45:36 -0700
Byte-compile this program: (defvar q-x) (defun z () (pop (aref q-x 0)) nil) I get: q.el:2:8:Warning: value returned from (aref v 0) is unused I think this warning is not very useful; while it is true that the aref result is not used, it's still convenient to use 'pop', there isn't a convenient substitute, and so there isn't anything useful to be done about this warning. In GNU Emacs 25.0.50.7 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9) of 2014-11-02 on bapiya Repository revision: 118270 larsi <at> gnus.org-20141103010307-bxryy53hat500i4w Windowing system distributor `Fedora Project', version 11.0.11404000 Configured using: `configure --prefix=/home/tromey/Emacs/install' Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS NOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB Important settings: value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=none locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: shell-dirtrack-mode: t diff-auto-refine-mode: t flyspell-mode: t which-function-mode: t global-auto-revert-mode: t desktop-save-mode: t erc-services-mode: t erc-list-mode: t erc-menu-mode: t erc-autojoin-mode: t erc-ring-mode: t erc-networks-mode: t erc-pcomplete-mode: t erc-track-mode: t erc-match-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-netsplit-mode: t erc-irccontrols-mode: t erc-noncommands-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t savehist-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t auto-fill-function: do-auto-fill Recent input: - a l l SPC ' ( p o p SPC ( a r e f SPC v e c SPC 0 ) ) M-b M-d 6 C-e <backspace> ) ) C-j C-z n C-x b b y t <tab> <tab> - c o <backspace> <backspace> c <backspace> <backspace> c o m <tab> <return> C-s v a l u e SPC r e t u r n e d C-s M-x l g r e p <return> v a l u e SPC r e t u r n e d <return> <return> <return> C-x o C-x 1 C-u C-u C-n C-u C-n C-n C-c C-c C-x C-g C-s C-w C-w C-a C-u C-p C-x 1 C-n C-l C-s e r r o r - f r e e C-s C-s C-r C-r C-r C-r C-x b q . e <tab> <return> C-g C-x C-f M-p M-p M-p M-p M-p M-p M-n <return> C-e C-a C-o ( d e f u n SPC z SPC ( ) C-n TAB C-e <return> C-p C-p C-a C-o ( d e f v a r SPC x ) C-n C-n C-e M-b 5 SPC M-d x C-e <return> n i l ) <return> C-f C-x C-o C-x C-s <switch-frame> <switch-frame> M-< C-k C-k C-n C-x C-s C-z n C-z n C-p C-o ( d e f u n <backspace> v <backspace> <backspace> v a r SPC q q <backspace> - x ) C-n C-n C-b C-b q - C-x C-s C-a C-k <tab> ( p o p SPC q - x ) C-x C-s <switch-frame> C-z n M-b ( <backspace> M-b ( a r e f SPC C-e C-b C-e SPC 0 ) C-x C-s <switch-frame> <switch-frame> M-b C-b C-t C-t C-x C-s C-z n M-x r e p o r <tab> <return> Recent messages: Wrote /home/tromey/Emacs/ET/q.el Saving file /home/tromey/Emacs/ET/q.el... Wrote /home/tromey/Emacs/ET/q.el Auto-saving...done Saving file /home/tromey/Emacs/ET/q.el... Wrote /home/tromey/Emacs/ET/q.el Saving file /home/tromey/Emacs/ET/q.el... Wrote /home/tromey/Emacs/ET/q.el Saving file /home/tromey/Emacs/ET/q.el... Wrote /home/tromey/Emacs/ET/q.el Load-path shadows: /home/tromey/.emacs.d/elpa/css-mode-1.0/css-mode hides /home/tromey/Emacs/install/share/emacs/25.0.50/lisp/textmodes/css-mode /home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides /home/tromey/Emacs/install/share/emacs/25.0.50/lisp/play/bubbles Features: (mailalias view xterm shadow emacsbug python json elcomp mail-hist find-dired pcmpl-unix pcmpl-gnu shell make-mode flow-fill mule-util bbdb-gui bbdb-hooks sort gnus-cite smiley shr-color color shr browse-url mm-archive gnus-async gnus-bcklg qp gnus-ml disp-table gnus-topic nndraft nnmh nnfolder utf-7 bbdb-gnus bbdb-snarf mail-extr bbdb-com warnings cl gnutls network-stream starttls gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg nntp gnus-cache gnus-registry registry eieio-base gnus-art mm-uu mml2015 mm-view mml-smime smime dig mailcap gnus-sum gnus-group gnus-undo smtpmail sendmail gnus-start gnus-cloud nnimap nnmail mail-source tls utf7 netrc nnoo parse-time gnus-spec gnus-int gnus-range gnus-win gnus gnus-ems nnheader idutils derived log-edit message rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev mail-utils gmm-utils mailheader pcvs-util eieio-opt speedbar sb-image ezimage dframe dabbrev help-mode debug copyright misearch multi-isearch edebug texinfo sh-script smie executable sgml-mode org-element org-rmail org-mhe org-irc org-info org-gnus org-docview doc-view image-mode org-bibtex bibtex org-bbdb org-w3m org org-macro org-footnote org-pcomplete org-list org-faces org-entities noutline outline org-version ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys ob-comint ob-core ob-eval org-compat org-macs org-loaddefs smerge-mode diff-mode easy-mmode bug-reference goto-addr add-log vc-arch vc-mtn vc-hg jka-compr dired vc-sccs vc-svn vc-cvs vc-rcs vc-bzr cc-mode cc-fonts cc-guess cc-menus cc-cmds vc-git flyspell ispell diminish projectile edmacro kmacro pkg-info find-func lisp-mnt epl grep compile dash s appt diary-lib diary-loaddefs cal-menu calendar cal-loaddefs which-func imenu minimap autorevert filenotify desktop frameset cus-start cus-load status erc-services erc-list erc-menu erc-join erc-ring erc-networks erc-pcomplete pcomplete erc-track erc-match erc-button wid-edit erc-fill erc-stamp erc-netsplit erc-goodies erc erc-backend erc-compat format-spec auth-source cl-macs gv eieio byte-opt bytecomp byte-compile cl-extra cconv eieio-core cl-loaddefs cl-lib gnus-util mm-util mail-prsvr password-cache thingatpt pp advice help-fns vc-dir ewoc vc vc-dispatcher cc-styles cc-align cc-engine cc-vars cc-defs bbdb timezone ange-ftp comint ansi-color ring server savehist dwarf-mode-autoloads gdb-shell-autoloads jabber-autoloads lisppaste-autoloads pydoc-info-autoloads info-look info easymenu weblogger-autoloads package epg-config bbdb-autoloads time-date tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment elisp-mode 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 gfilenotify dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs) Memory information: ((conses 16 1079236 147373) (symbols 48 101416 18) (miscs 40 42437 4907) (strings 32 315780 71503) (string-bytes 1 7486012) (vectors 16 97717) (vector-slots 8 2099698 83288) (floats 8 573 1002) (intervals 56 64171 4427) (buffers 976 232) (heap 1024 260330 33179)) Tom
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