Package: emacs;
Reported by: peder <at> klingenberg.no (Peder O. Klingenberg)
Date: Fri, 26 Aug 2016 20:19:02 UTC
Severity: normal
Tags: fixed, patch
Found in version 25.1.50
Fixed in version 25.2
Done: npostavs <at> users.sourceforge.net
Bug is archived. No further changes may be made.
Message #8 received at 24315 <at> debbugs.gnu.org (full text, mbox):
From: npostavs <at> users.sourceforge.net To: peder <at> klingenberg.no (Peder O. Klingenberg) Cc: 24315 <at> debbugs.gnu.org Subject: Re: bug#24315: 25.1.50; re-search-forward errors with "Variable binding depth exceeds max-specpdl-size" Date: Fri, 26 Aug 2016 23:35:51 -0400
peder <at> klingenberg.no (Peder O. Klingenberg) writes:
> I recently started using gnus-icalendar to handle meeting invitations.
> Someone sent me an invitation that included a rather long email thread
> in typical outlook style, and gnus errored out when trying to display
> the article.
>
> The backtrace showed that the error comes from the call
> (re-search-forward "\\(.*\\)\\(\r?\n[ \t].*\\)*" nil t)
> in icalendar--read-element (nil nil).
This looks like it would be an inefficient regexp, since it has nested
stars. I suspect searching for "^[ \t]" multiple times would be more
efficient than trying to match multiple lines in a single regexp.
>
> Strangely, the same recipe does not reproduce the error on os x, with a
> build from master from 2016-08-12, but on my GNU/Linux machine, which is
> where I run gnus and need this to work, it is 100% reproducible. I am
> on Kubuntu 14.04.5, emacs is compiled with gcc (Ubuntu
> 4.8.4-2ubuntu1~14.04.3) 4.8.4.
>
> Is this reproducible for anyone else, or do I need to dig deeper into my
> environment? Any ideas on where to start digging?
(I'm also on GNU/Linux, Arch) I get the same max-specpdl-size error with
25.1.50, with 24.5 (and below) I get (error "Stack overflow in regexp
matcher") and with 25.1-rc1 I get an assertion failure:
character.h:703: Emacs fatal error: assertion failed: CHAR_VALID_P (ch)
Thread 1 "emacs" hit Breakpoint 1, terminate_due_to_signal (sig=6, backtrace_limit=2147483647)
at emacs.c:354
354 signal (sig, SIG_DFL);
(gdb) bt
#0 terminate_due_to_signal (sig=6, backtrace_limit=2147483647) at emacs.c:354
#1 0x00000000005fa92d in die (msg=0x722518 "CHAR_VALID_P (ch)", file=0x72250c "character.h",
line=703) at alloc.c:7223
#2 0x000000000056b841 in char_table_translate (obj=20656133, ch=4194341) at character.h:703
#3 0x00000000005e9d33 in re_match_2_internal (bufp=0xd68260 <searchbufs+32>,
string1=0x1a9a970 " \202\245\001", size1=0, string2=0x1a9a970 " \202\245\001", size2=40918,
pos=0, regs=0xd69e70 <search_regs>, stop=40918) at regex.c:5430
#4 0x00000000005e782c in re_search_2 (bufp=0xd68260 <searchbufs+32>, str1=0x1a9a970 " \202\245\001",
size1=0, str2=0x1a9a970 " \202\245\001", size2=40918, startpos=0, range=40918,
regs=0xd69e70 <search_regs>, stop=40918) at regex.c:4446
#5 0x00000000005d6447 in search_buffer (string=14974596, pos=1, pos_byte=1, lim=40891,
lim_byte=40919, n=1, RE=1, trt=20656133, inverse_trt=20532565, posix=false) at search.c:1265
#6 0x00000000005d5be2 in search_command (string=14974596, bound=0, noerror=44448, count=0,
direction=1, RE=1, posix=false) at search.c:1058
#7 0x00000000005d99a7 in Fre_search_forward (regexp=14974596, bound=0, noerror=44448, count=0)
at search.c:2264
#8 0x000000000061cac3 in eval_sub (form=26022259) at eval.c:2176
#9 0x000000000061c124 in Feval (form=26022259, lexical=0) at eval.c:1988
#10 0x000000000061e052 in Ffuncall (nargs=3, args=0x7fffffffd678) at eval.c:2696
#11 0x0000000000668285 in exec_byte_code (bytestr=10946844, vector=10946877, maxdepth=30,
args_template=2054, nargs=2, args=0x7fffffffdc90) at bytecode.c:880
#12 0x000000000061e958 in funcall_lambda (fun=10946789, nargs=2, arg_vector=0x7fffffffdc80)
at eval.c:2855
#13 0x000000000061e2a1 in Ffuncall (nargs=3, args=0x7fffffffdc78) at eval.c:2742
#14 0x000000000061488d in Ffuncall_interactively (nargs=3, args=0x7fffffffdc78) at callint.c:252
#15 0x000000000061dee7 in Ffuncall (nargs=4, args=0x7fffffffdc70) at eval.c:2673
#16 0x000000000061d338 in Fapply (nargs=3, args=0x7fffffffdd50) at eval.c:2321
#17 0x0000000000614d93 in Fcall_interactively (function=4198576, record_flag=0, keys=14640533)
at callint.c:389
#18 0x000000000061e08d in Ffuncall (nargs=4, args=0x7fffffffdfd8) at eval.c:2700
#19 0x0000000000668285 in exec_byte_code (bytestr=10951116, vector=10951149, maxdepth=54,
args_template=4102, nargs=1, args=0x7fffffffe530) at bytecode.c:880
#20 0x000000000061e958 in funcall_lambda (fun=10951069, nargs=1, arg_vector=0x7fffffffe528)
at eval.c:2855
#21 0x000000000061e2a1 in Ffuncall (nargs=2, args=0x7fffffffe520) at eval.c:2742
#22 0x000000000061d9e5 in call1 (fn=14784, arg1=4198576) at eval.c:2552
#23 0x00000000005734ce in command_loop_1 () at keyboard.c:1479
#24 0x000000000061a7c1 in internal_condition_case (bfun=0x572cb4 <command_loop_1>, handlers=19056,
hfun=0x572346 <cmd_error>) at eval.c:1309
#25 0x00000000005728f6 in command_loop_2 (ignore=0) at keyboard.c:1107
#26 0x0000000000619d90 in internal_catch (tag=45840, func=0x5728cd <command_loop_2>, arg=0)
at eval.c:1074
#27 0x0000000000572898 in command_loop () at keyboard.c:1086
#28 0x0000000000571e36 in recursive_edit_1 () at keyboard.c:692
#29 0x0000000000572036 in Frecursive_edit () at keyboard.c:763
#30 0x000000000056fde3 in main (argc=3, argv=0x7fffffffe9d8) at emacs.c:1626
Lisp Backtrace:
"re-search-forward" (0xffffd470)
"eval" (0xffffd680)
"eval-expression" (0xffffdc80)
"funcall-interactively" (0xffffdc78)
"call-interactively" (0xffffdfe0)
"command-execute" (0xffffe528)
>
>
>
> In GNU Emacs 25.1.50.2 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
> of 2016-08-11 built on luna
> Repository revision: 36a57c55f2b855bca704c26bf7d787b7b471fe16
> Windowing system distributor 'The X.Org Foundation', version 11.0.11604000
> System Description: Ubuntu 14.04.5 LTS
>
> Recent messages:
> scroll-down-command: Beginning of buffer [3 times]
> (Shell command succeeded with no output) [91 times]
> Back to top level
> When done with this frame, type C-x 5 0
> Undo! [3 times]
> calendar-event-problem.txt changed on disk; really edit the buffer? (y, n, r or C-h) r
> ask-user-about-supersession-threat: File reverted: /home/pok/tmp/calendar-event-problem.txt
> previous-line: Beginning of buffer [3 times]
> Entering debugger...
> Back to top level
>
> Configured using:
> 'configure --prefix=/usr/local/emacs-git
> --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/site-lisp/:/usr/share/emacs/site-lisp
> --with-x=yes --with-x-toolkit=lucid --with-toolkit-scroll-bars
> --with-pop=yes'
>
> Configured features:
> XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF
> GSETTINGS NOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT
> ZLIB TOOLKIT_SCROLL_BARS LUCID X11
>
> Important settings:
> value of $LC_MONETARY: en_US.UTF-8
> value of $LC_NUMERIC: en_US.UTF-8
> value of $LANG: en_US.UTF-8
> locale-coding-system: utf-8-unix
>
> Major mode: Text
>
> Minor modes in effect:
> csv-field-index-mode: t
> magit-auto-revert-mode: t
> global-git-commit-mode: t
> async-bytecomp-package-mode: t
> shell-dirtrack-mode: t
> diff-auto-refine-mode: t
> show-paren-mode: t
> yas-global-mode: t
> yas-minor-mode: t
> ido-everywhere: t
> global-eldoc-mode: t
> electric-indent-mode: t
> mouse-wheel-mode: t
> menu-bar-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
> line-number-mode: t
> auto-fill-function: do-auto-fill
> transient-mark-mode: t
>
> Load-path shadows:
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> /home/pok/.emacs.d/elpa/org-20160822/org-plot hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-plot
> /home/pok/.emacs.d/elpa/org-20160822/ob-eval hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-eval
> /home/pok/.emacs.d/elpa/org-20160822/org-table hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-table
> /home/pok/.emacs.d/elpa/org-20160822/ox-beamer hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ox-beamer
> /home/pok/.emacs.d/elpa/org-20160822/ox-odt hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ox-odt
> /home/pok/.emacs.d/elpa/org-20160822/ob-core hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-core
> /home/pok/.emacs.d/elpa/org-20160822/org-inlinetask hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-inlinetask
> /home/pok/.emacs.d/elpa/org-20160822/org-rmail hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-rmail
> /home/pok/.emacs.d/elpa/org-20160822/ox-icalendar hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ox-icalendar
> /home/pok/.emacs.d/elpa/org-20160822/ob-lilypond hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-lilypond
> /home/pok/.emacs.d/elpa/org-20160822/ob-picolisp hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-picolisp
> /home/pok/.emacs.d/elpa/org-20160822/ob-sass hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-sass
> /home/pok/.emacs.d/elpa/org-20160822/org-eshell hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-eshell
> /home/pok/.emacs.d/elpa/org-20160822/ob-awk hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-awk
> /home/pok/.emacs.d/elpa/org-20160822/ob-ruby hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-ruby
> /home/pok/.emacs.d/elpa/org-20160822/ob-ocaml hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-ocaml
> /home/pok/.emacs.d/elpa/org-20160822/ob-js hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/ob-js
> /home/pok/.emacs.d/elpa/org-20160822/org-footnote hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-footnote
> /home/pok/.emacs.d/elpa/org-20160822/org-bbdb hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/org/org-bbdb
> /usr/share/emacs24/site-lisp/latex-cjk-thai/thai-word hides /usr/local/emacs-git/share/emacs/25.1.50/lisp/language/thai-word
>
> Features:
> (shadow emacsbug gnus-dup gnus-draft nndoc cus-edit ess-omg-l
> ess-toolbar ess-mouse mouseme ess-menu ess-swv ess-noweb essd-els
> ess-sas-d ess-sas-l ess-sas-a ess-sta-d ess-sta-l make-regexp ess-sp6-d
> ess-dde ess-sp3-d ess-julia julia-mode ess-r-d ess-r-syntax
> ess-r-completion ess-roxy essddr hideshow ess-help reporter
> ess-r-package ess-s-l ess-site ess ess-inf ess-tracebug ess-mode
> ess-noweb-mode ess-custom executable ess-generics ess-utils ess-bugs-l
> ess-compat ess-lsp-l map esh-var esh-io esh-cmd esh-opt esh-ext esh-proc
> esh-arg esh-groups eshell esh-module esh-mode esh-util dired-x autoload
> tar-mode ffap php-mode flymake cc-mode cc-fonts cc-guess cc-menus
> cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs hippie-exp vc
> vc-dispatcher url-queue grep pulse vc-cvs slime-indentation
> slime-cl-indent cl-indent slime-fancy slime-trace-dialog
> slime-fontifying-fu slime-package-fu slime-references
> slime-compiler-notes-tree slime-scratch slime-presentations bridge
> slime-macrostep macrostep slime-mdot-fu slime-enclosing-context
> slime-fuzzy slime-fancy-trace slime-fancy-inspector slime-c-p-c
> slime-editing-commands slime-autodoc slime-repl elp slime-parse slime
> lisp-mnt gud apropos etags xref project arc-mode archive-mode hyperspec
> csv-mode magit-blame magit-stash magit-bisect magit-remote magit-commit
> magit-sequence magit magit-apply magit-wip magit-log magit-diff
> smerge-mode magit-core magit-autorevert autorevert filenotify
> magit-process magit-popup magit-mode magit-git magit-section magit-utils
> git-commit log-edit pcvs-util with-editor async-bytecomp async tramp-sh
> tramp tramp-compat tramp-loaddefs trampver ucs-normalize shell dash
> eieio-opt speedbar sb-image ezimage dframe cal-china lunar solar cal-dst
> cal-bahai cal-islam cal-hebrew holidays hol-loaddefs cal-iso bookmark pp
> tabify org-rmail org-mhe org-irc org-info org-gnus org-docview doc-view
> jka-compr image-mode org-bbdb org-w3m org-table org-archive org-clock
> org-indent ob-ditaa ob-plantuml org-bibtex org-element avl-tree bibtex
> org-colview org-crypt org-habit org-agenda help-fns radix-tree misearch
> multi-isearch thingatpt debbugs-gnu add-log debbugs soap-client warnings
> rng-xsd rng-dt rng-util xsd-regexp debug cus-start cus-load mailalias
> bbdb-message footnote ecomplete flow-fill vc-git diff-mode sort
> gnus-cite shr-color color shr svg dom browse-url mail-extr gnus-async
> gnus-bcklg qp gnus-ml disp-table gnus-topic mm-archive url-http url-gw
> url-cache url-auth pop3 nnrss xml mm-url url url-proxy url-privacy
> url-expand url-methods url-history url-cookie url-domsuf url-util
> nndraft nnmh nnml utf-7 bbdb-gnus epa-file network-stream nsm starttls
> gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg nntp
> gnus-cache pok-gnus gnus-icalendar org-capture gnus-art mm-uu mml2015
> mm-view mml-smime smime dig mailcap icalendar diary-lib diary-loaddefs
> nnir gnus-sum gnus-group gnus-undo bbdb-mua bbdb-com crm bbdb bbdb-site
> timezone gnus-start gnus-cloud nnimap nnmail mail-source tls gnutls utf7
> netrc nnoo parse-time gnus-spec gnus-int gnus-range message sendmail
> puny dired dired-loaddefs rfc822 mml mml-sec epa derived epg mm-decode
> mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
> gnus-win gnus nnheader subr-x gnus-util rmail rmail-loaddefs rfc2047
> rfc2045 ietf-drums mail-utils wid-edit linum paren paredit pok-init
> bugz-mode yasnippet org advice org-macro org-footnote org-pcomplete
> pcomplete org-list org-faces org-entities time-date 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 format-spec find-func cal-menu calendar cal-loaddefs gedcom
> slime-autoloads reftex reftex-loaddefs reftex-vars edmacro kmacro ido
> server filladapt dmacro mm-util mail-prsvr cl compile comint ansi-color
> ring finder-inf tex-site info package epg-config url-handlers url-parse
> auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
> password-cache url-vars seq byte-opt gv bytecomp byte-compile cl-extra
> help-mode easymenu cconv cl-loaddefs pcase cl-lib emacs-goodies-el
> emacs-goodies-custom emacs-goodies-loaddefs easy-mmode mule-util tooltip
> eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
> term/x-win x-win term/common-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 term/tty-colors frame
> cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai
> tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian
> slovak czech european ethiopic indian cyrillic chinese charscript
> case-table epa-hook jka-cmpr-hook help simple abbrev obarray 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 dbusbind inotify
> dynamic-setting system-font-setting font-render-setting x-toolkit x
> multi-tty make-network-process emacs)
>
> Memory information:
> ((conses 16 2485829 182861)
> (symbols 48 72236 91)
> (miscs 40 3269 4672)
> (strings 32 298119 63000)
> (string-bytes 1 12887713)
> (vectors 16 103720)
> (vector-slots 8 2448384 49706)
> (floats 8 4985 2034)
> (intervals 56 225770 627)
> (buffers 976 190)
> (heap 1024 299121 -1842968))
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.