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emacs-21.3 core dumping on C-g


From: Russell Senior
Subject: emacs-21.3 core dumping on C-g
Date: 1 Dec 2003 00:41:25 -0000

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In GNU Emacs 21.3.1 (i686-pc-linux-gnu, X toolkit)
 of 2003-11-02 on coulee
configured using `configure  --srcdir=/src/emacs-21.3 
--prefix=/packages/emacs/emacs21 --datadir=/common/share --with-pop'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Several dozen times now over the course of a couple months, I've had
emacs core dump on me.  This is a vanilla emacs-21.3 with leim-21.3
compiled from source, running on a GNU/Linux Debian unstable box.
Always it occurs as a result of aborting some command with a C-g.  C-g
does not alway cause this result.  Usually, emacs has been running for
some time, and I've been using Gnus extensively.  I carefully
collected a core file from the most recent crash.  Gdb says:

  $ gdb /packages/emacs/emacs21/bin/emacs core
  GNU gdb 6.0-debian
  Copyright 2003 Free Software Foundation, Inc.
  GDB is free software, covered by the GNU General Public License, and you are
  welcome to change it and/or distribute copies of it under certain conditions.
  Type "show copying" to see the conditions.
  There is absolutely no warranty for GDB.  Type "show warranty" for details.
  This GDB was configured as "i386-linux"...
  Core was generated by `emacs --iconic'.
  Program terminated with signal 6, Aborted.
  Reading symbols from /usr/X11R6/lib/libXaw.so.7...done.
  Loaded symbols for /usr/X11R6/lib/libXaw.so.7
  Reading symbols from /usr/X11R6/lib/libXmu.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libXmu.so.6
  Reading symbols from /usr/X11R6/lib/libXt.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libXt.so.6
  Reading symbols from /usr/X11R6/lib/libSM.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libSM.so.6
  Reading symbols from /usr/X11R6/lib/libICE.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libICE.so.6
  Reading symbols from /usr/X11R6/lib/libXext.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libXext.so.6
  Reading symbols from /usr/lib/libpng10.so.0...done.
  Loaded symbols for /usr/lib/libpng10.so.0
  Reading symbols from /usr/lib/libz.so.1...done.
  Loaded symbols for /usr/lib/libz.so.1
  Reading symbols from /lib/libm.so.6...done.
  Loaded symbols for /lib/libm.so.6
  Reading symbols from /usr/X11R6/lib/libXpm.so.4...done.
  Loaded symbols for /usr/X11R6/lib/libXpm.so.4
  Reading symbols from /usr/X11R6/lib/libX11.so.6...done.
  Loaded symbols for /usr/X11R6/lib/libX11.so.6
  Reading symbols from /lib/libncurses.so.5...done.
  Loaded symbols for /lib/libncurses.so.5
  Reading symbols from /lib/libc.so.6...done.
  Loaded symbols for /lib/libc.so.6
  Reading symbols from /lib/ld-linux.so.2...done.
  Loaded symbols for /lib/ld-linux.so.2
  Reading symbols from /lib/libdl.so.2...done.
  Loaded symbols for /lib/libdl.so.2
  Reading symbols from /lib/libnss_dns.so.2...done.
  Loaded symbols for /lib/libnss_dns.so.2
  Reading symbols from /lib/libresolv.so.2...done.
  Loaded symbols for /lib/libresolv.so.2
  Reading symbols from /lib/libnss_compat.so.2...done.
  Loaded symbols for /lib/libnss_compat.so.2
  Reading symbols from /lib/libnsl.so.1...done.
  Loaded symbols for /lib/libnsl.so.1
  Reading symbols from /lib/libnss_nis.so.2...done.
  Loaded symbols for /lib/libnss_nis.so.2
  Reading symbols from /lib/libnss_files.so.2...done.
  Loaded symbols for /lib/libnss_files.so.2
  Reading symbols from /usr/X11R6/lib/X11/locale/common/xlcDef.so.2...done.
  Loaded symbols for /usr/X11R6/lib/X11/locale/common/xlcDef.so.2
  Reading symbols from /usr/X11R6/lib/X11/locale/common/ximcp.so.2...done.
  Loaded symbols for /usr/X11R6/lib/X11/locale/common/ximcp.so.2
  Reading symbols from /usr/X11R6/lib/X11/locale/common/xomGeneric.so.2...done.
  Loaded symbols for /usr/X11R6/lib/X11/locale/common/xomGeneric.so.2
  Reading symbols from /lib/libnss_db.so.2...done.
  Loaded symbols for /lib/libnss_db.so.2
  Reading symbols from /usr/lib/libdb3.so.3...done.
  Loaded symbols for /usr/lib/libdb3.so.3
  #0  0x402a1641 in kill () from /lib/libc.so.6
  (gdb) bt
  #0  0x402a1641 in kill () from /lib/libc.so.6
  #1  0x080ce17b in fatal_error_signal (sig=6) at 
/src/emacs-21.3/src/emacs.c:354
  #2  <signal handler called>
  #3  0x402a1641 in kill () from /lib/libc.so.6
  #4  0x080ce19e in abort () at /src/emacs-21.3/src/emacs.c:387
  #5  0x08123323 in Fsignal (error_symbol=405312220, data=405215852)
      at /src/emacs-21.3/src/eval.c:1387
  #6  0x0812a9b7 in Fdelq (elt=1494043428, list=405215852)
      at /src/emacs-21.3/src/fns.c:1596
  #7  0x0814cf9a in remove_process (proc=1221284656)
      at /src/emacs-21.3/src/process.c:478
  #8  0x0814d2ac in Fdelete_process (process=1221284656)
      at /src/emacs-21.3/src/process.c:586
  #9  0x08151533 in kill_buffer_processes (buffer=405215852)
      at /src/emacs-21.3/src/process.c:4133
  #10 0x080cf897 in shut_down_emacs (sig=11, no_x=0, stuff=405215852)
      at /src/emacs-21.3/src/emacs.c:1882
  #11 0x080ce121 in fatal_error_signal (sig=11) at 
/src/emacs-21.3/src/emacs.c:341
  #12 <signal handler called>
  #13 0x08150a91 in send_process (proc=1223046560, 
      buf=0x42 <Address 0x42 out of bounds>, len=-1073755256, object=134661393)
      at /src/emacs-21.3/src/process.c:3519
  #14 0x2000cc30 in ?? ()
  #15 0x48e635a0 in ?? ()
  #16 0x00000042 in ?? ()
  #17 0xbfffcb88 in ?? ()
  #18 0x0806c511 in append_space (it=0x0, default_face_p=0)
      at /src/emacs-21.3/src/xdisp.c:12620
  Previous frame inner to this frame (corrupt stack?)



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