[Bug: 21.5-b17] [21.5-b17] Crash with font-lock

Thu Aug 5 07:59:38 EDT 2004

Dear XEmacs-Bug-Team,

it's been awhile, but I recently had another shot at the current
development version, to see whether the font-lock related crashes I
encountered are gone. They're not, unfortunately. What I do is
running xemacs -vanilla, enable font-locking, load some file that
would get fontified and *boom*.

Funny thing is, if I enable lazy-shot, it's a lot more difficult to
trigger the problem, so that's my current workaround.

Lisp backtrace follows:

  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # bind (inhibit-quit)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  redisplay-frame(#<x-frame "emacs" 0x1418>)
  # bind (ext gutter-string val inhibit-read-only frame value message)
  raw-append-progress-feedback("Fontifying font-lock-stuff.el..." 0 #<x-frame "emacs" 0x1418>)
  # bind (tmsg top frame value message label)
  append-progress-feedback(font-lock "Fontifying font-lock-stuff.el..." 0 nil)
  # bind (frame value message label)
  display-progress-feedback(font-lock "Fontifying font-lock-stuff.el..." 0)
  # bind (str)
  # (unwind-protect ...)
  # bind (args value fmt label)
  progress-feedback-with-label(font-lock "Fontifying %s..." 0 "font-lock-stuff.el")
  # bind (maybe-loudly end beg)
  font-lock-default-unfontify-region(1 3389 t)
  # bind (loudly end beg)
  font-lock-unfontify-region(1 3389 t)
  # bind (was-on font-lock-verbose font-lock-message-threshold aborted)
  # (unwind-protect ...)
  font-lock-default-fontify-buffer()
  # bind (font-lock-verbose)
  font-lock-fontify-buffer()
  # bind (on-p maximum-size arg)
  font-lock-mode(1)
  turn-on-font-lock()
  # bind (explicit-defaults)
  font-lock-set-defaults()
  run-hooks(font-lock-set-defaults)
  # bind (nomodes after-find-file-from-revert-buffer noauto warn error)
  after-find-file(nil t)
  # (unwind-protect ...)
  # bind (inhibit-read-only error number truename rawfile nowarn filename buf)
  find-file-noselect-1(#<buffer "font-lock-stuff.el"> "/home/schauer/emacs/elisp/config/font-lock-stuff.el" nil nil "/home/schauer/emacs/elisp/config/font-lock-stuff.el" (466429 776))
  byte-code("..." [number truename rawfile nowarn filename buf set-buffer-major-mode find-file-noselect-1] 7)
  # (condition-case ... . ((t (byte-code "!¨Ã @       A\"§" [buf data kill-buffer signal] 3))))
  # bind (number truename buf wildcards rawfile nowarn filename)
  find-file-noselect("~/emacs/elisp/config/font-lock-stuff.el" nil nil t)
  # bind (wildcards codesys filename)
  #<compiled-function (filename &optional codesys wildcards) "...(53)" [coding-system-for-read wildcards filename codesys value get-coding-system find-file-noselect nil mapcar switch-to-buffer] 6 1045931 (list (read-file-name "Find file: ") (and current-prefix-arg (read-coding-system "Coding system: ")) t)>("~/emacs/elisp/config/font-lock-stuff.el" nil t)
  call-interactively(find-file)
  (dispatch-event "[internal]")
  # (condition-case ... . error)
  # (catch top-level ...)

Segmentation fault (core dumped)

GDB just gives me:

[gimli->schauer]gdb /usr/local/bin/xemacs core
(gdb) where
#0  0x40298781 in kill () from /lib/libc.so.6
Cannot access memory at address 0xbfffd5f8
gdb) bt
#0  0x40298781 in kill () from /lib/libc.so.6
#1  0x00000000 in ?? ()

Hmmm. I compiled with -debug --error-checking=all. Anything else?

uname -a: Linux gimli 2.4.26 #1 Thu Apr 22 11:26:50 CEST 2004 i686 unknown

./configure  '--mail-locking=flock' '--with-site-lisp' '--with-pop' '--with-mule' '--with-site-lisp' '--with-widgets=athena' '--debug' '--error-checking=all'

XEmacs 21.5-b17 "chayote" (+CVS-20040321) configured for `i686-pc-linux'.

Compilation Environment and Installation Defaults:
  Source code location:              /usr/local/src/xemacs-21.5.17
  Installation prefix:               /usr/local
  Operating system description file: `s/linux.h'
  Machine description file:          `m/intel386.h'
  Compiler version:                  2.95.4
    - GCC specs file:                /usr/lib/gcc-lib/i386-linux/2.95.4/specs
    - Compiler command:              gcc  -g -O3
  libc version:                      GNU libc  (Debian)
  Relocating allocator for buffers:  no
  GNU version of malloc:             yes
    - Using Doug Lea's new malloc from the GNU C Library.

Window System:
  Compiling in support for the X window system:
    - X Windows headers location:                 /usr/X11R6/include
    - X Windows libraries location:               /usr/X11R6/lib
    - Handling WM_COMMAND properly.
  Compiling in support for the Athena widget set:
    - Athena headers location:                    X11/Xaw
    - Athena library to link:                     Xaw
  Using Lucid menubars.
  Using Lucid scrollbars.
  Using Athena dialog boxes.
  Using Athena native widgets.

TTY:
  Compiling in support for ncurses.

Images:
  Compiling in support for GIF  images (builtin).
  Compiling in support for XPM  images.
  Compiling in support for PNG  images.
  Compiling in support for JPEG images.
  Compiling in support for X-Face message headers.

Sound:
  Compiling in support for sound (native).

Databases:

Internationalization:
  Compiling in support for Mule (multi-lingual Emacs).
  Compiling in support for XIM (X11R5+ I18N input method).
    - Using raw Xlib to provide XIM support.

Mail:
  Compiling in support for POP mail retrieval.
  Compiling in support for "flock" mail spool file locking method.

Other Features:
  Inhibiting IPv6 canonicalization at startup.
  Compiling in support for dynamic shared object modules.
  Using the new portable dumper.
  Compiling in support for extra debugging code.
  WARNING: ---------------------------------------------------------
  WARNING: Compiling in support for runtime error checking.
  WARNING: XEmacs will run noticeably more slowly as a result.
  WARNING: Error checking is on by default for XEmacs beta releases.
  WARNING: ---------------------------------------------------------

Any clues?

Holger

PS: Please CC: me, as I no longer follow xemacs-beta, although I'll
have a look at the web archive in the following days.

-- 
---          http://www.coling.uni-freiburg.de/~schauer/            ---
Fachbegriffe der Informatik - Einfach erklärt
120: INN 2.x
       INN 2.x ist wie Fertig-Spaghetti aus der Tüte. Schmeckt lecker
       und ist im Grunde ganz einfach zuzubereiten. Trotzdem muß man
       ständig umrühren, damit's nicht anbrennt.
       (Andreas M. Kirchwitz)