bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode

[Tom Tromey]

I'm running some reasonably recent emacs trunk on x86-64 Fedora 20.

If I enable global-auto-revert-mode, Emacs crashes with some regularity.

I caught the crash in gdb once and tracked it down to this bug:

https://bugzilla.gnome.org/show_bug.cgi?id=739424

I am not sure whether Emacs can work around this or not.
Perhaps one approach would be to not use the glib file-polling code.




In GNU Emacs 25.0.50.5 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9)
 of 2015-04-02 on pokyo
Repository revision: ece8f600833e3011be976384f9a5657faa83f6db
Windowing system distributor `Fedora Project', version 11.0.11404000
System Description:     Fedora release 20 (Heisenbug)

Configured using:
 `configure --prefix=/home/tromey/Emacs/install'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: JS

Minor modes in effect:
  erc-notifications-mode: t
  flymake-mode: t
  erc-spelling-mode: t
  erc-truncate-mode: t
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  flyspell-mode: t
  which-function-mode: t
  projectile-global-mode: t
  projectile-mode: t
  erc-notify-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-track-minor-mode: t
  erc-match-mode: t
  erc-netsplit-mode: t
  erc-hl-nicks-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-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
  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 messages:
(Shell command succeeded with no output)
Mark set
Quit [2 times]
Mark set [4 times]
Saving file 
/home/tromey/firefox-git/gecko-dev/browser/devtools/shared/widgets/CubicBezierWidget.js...
Add 2015 to copyright? (y or n) n
Wrote 
/home/tromey/firefox-git/gecko-dev/browser/devtools/shared/widgets/CubicBezierWidget.js
C-z C-g is undefined
When done with a buffer, type C-x #
(No files need saving)

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 
/home/tromey/Emacs/install/share/emacs/25.0.50/lisp/play/bubbles

Features:
(shadow emacsbug vc-mtn vc-hg gnus-fun filecache novice cus-edit
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 two-column descr-text iso-transl url-http url-gw url-auth
eww url-queue bbdb-sc supercite regi css-mode cal-move mailalias
erc-desktop-notifications apropos log-edit dired-aux gdb-shell
find-dired mail-hist nnir hi-lock jka-compr webjump conf-mode etags xref
rst vc-annotate gnus-draft asm-mode gud log-view pcvs-util eieio-opt
speedbar sb-image ezimage dframe smerge-mode rebase-mode rx web-mode
sgml-mode nxml-uchnm rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid
rng-loc rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn
nxml-ns nxml-mode nxml-outln nxml-rap nxml-util nxml-glyph nxml-enc
xmltok flymake-jshint flymake js ido gnus-html url-cache mm-url url
url-proxy url-privacy url-expand url-methods url-history url-cookie
url-domsuf sh-script smie executable xterm nnregistry idutils derived
vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs shr-color erc-spelling
erc-truncate help-mode flow-fill url-util url-parse url-vars shr dom
subr-x browse-url mm-archive bbdb-gui bbdb-hooks mule-util sort smiley
gnus-cite qp gnus-bcklg python json make-mode gnus-async gnus-ml
disp-table gnus-topic nndraft nnmh nnfolder utf-7 bbdb-gnus bbdb-snarf
mail-extr bbdb-com gnutls network-stream nsm starttls gnus-agent
gnus-srvr gnus-score score-mode nnvirtual gnus-msg nntp gnus-cache
gnus-registry registry eieio-compat 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 message dired
rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
rfc2047 rfc2045 ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus
gnus-ems nnheader mail-utils shell copyright misearch multi-isearch
find-file add-log bug-reference vc-git diff-mode easy-mmode cc-mode
cc-fonts cc-guess cc-menus cc-cmds dabbrev flyspell ispell diminish appt
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs which-func imenu
edmacro kmacro projectile ibuf-ext ibuffer pkg-info find-func lisp-mnt
epl grep compile dash s minimap autorevert filenotify desktop frameset
cus-start cus-load erc-nick-notify erc-notify notifications dbus xml
erc-services erc-list erc-menu erc-join erc-ring erc-networks
erc-pcomplete pcomplete erc-track erc-match erc-netsplit erc-hl-nicks
color cl erc-button erc-fill erc-stamp wid-edit erc-goodies erc
erc-backend erc-compat format-spec auth-source cl-macs eieio gnus-util
mm-util mail-prsvr password-cache thingatpt pp status warnings 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 finder-inf dwarf-mode-autoloads eieio-core cl-generic byte-opt
gv bytecomp byte-compile cl-extra seq cconv cl-loaddefs pcase cl-lib
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
cl-preloaded 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 4244894 918369)
 (symbols 48 144018 301)
 (miscs 40 46671 1822)
 (strings 32 645840 163012)
 (string-bytes 1 21947269)
 (vectors 16 140226)
 (vector-slots 8 3058049 93087)
 (floats 8 1021 1720)
 (intervals 56 514873 555)
 (buffers 976 879)
 (heap 1024 468654 444115))

Tom