Re: Crash of Emacs 22.1

[Jochen Luebbers]

Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> Not much to go on.  The part of the stack trace just before entering the
> GC might be a bit more enlightening, although I wouldn't hold my breath.

Here it is:

#22 0x0816c992 in Fbyte_code (bytestr=136141291, vector=136141308, 
    maxdepth=48) at bytecode.c:724
#23 0x081432fb in funcall_lambda (fun=136141228, nargs=4, 
    arg_vector=0xbff7d2b4) at eval.c:3184
#24 0x08143726 in Ffuncall (nargs=5, args=0xbff7d2b0) at eval.c:3054
#25 0x0816ba71 in Fbyte_code (bytestr=136150731, vector=136150748, 
    maxdepth=48) at bytecode.c:679
#26 0x081432fb in funcall_lambda (fun=136150676, nargs=2, 
    arg_vector=0xbff7d3f4) at eval.c:3184
#27 0x08143726 in Ffuncall (nargs=3, args=0xbff7d3f0) at eval.c:3054
#28 0x0816ba71 in Fbyte_code (bytestr=136150851, vector=136150868, 
    maxdepth=48) at bytecode.c:679
#29 0x081432fb in funcall_lambda (fun=136150788, nargs=3, 
    arg_vector=0xbff7d534) at eval.c:3184
#30 0x08143726 in Ffuncall (nargs=4, args=0xbff7d530) at eval.c:3054
#31 0x0816ba71 in Fbyte_code (bytestr=136154499, vector=136154524, 
    maxdepth=40) at bytecode.c:679
#32 0x08142e9f in Feval (form=136154485) at eval.c:2328
#33 0x08144f61 in internal_lisp_condition_case (var=137386185, 
    bodyform=136154485, handlers=136154605) at eval.c:1426
#34 0x0816be66 in Fbyte_code (bytestr=136154107, vector=136154124, 
    maxdepth=72) at bytecode.c:869
#35 0x081432fb in funcall_lambda (fun=136154068, nargs=1, 
    arg_vector=0xbff7d914) at eval.c:3184
#36 0x08143726 in Ffuncall (nargs=2, args=0xbff7d910) at eval.c:3054
#37 0x08144784 in call1 (fn=137542081, arg1=164329260) at eval.c:2782
#38 0x080cf3e6 in Fx_show_tip (string=164319123, frame=160999692, 
    parms=162084773, timeout=80, dx=40, dy=160) at xfns.c:4951
#39 0x0814381f in Ffuncall (nargs=7, args=0xbff7dad0) at eval.c:3028
#40 0x0816ba71 in Fbyte_code (bytestr=136614139, vector=136614164, 
    maxdepth=56) at bytecode.c:679
#41 0x08142e9f in Feval (form=136614125) at eval.c:2328
#42 0x08144f61 in internal_lisp_condition_case (var=137431641, 
    bodyform=136614125, handlers=136614269) at eval.c:1426
#43 0x0816be66 in Fbyte_code (bytestr=136614051, vector=136614068, 
    maxdepth=24) at bytecode.c:869
#44 0x081432fb in funcall_lambda (fun=136613996, nargs=2, 
    arg_vector=0xbff7de74) at eval.c:3184
#45 0x08143726 in Ffuncall (nargs=3, args=0xbff7de70) at eval.c:3054
#46 0x0816ba71 in Fbyte_code (bytestr=136615547, vector=136615564, 
    maxdepth=24) at bytecode.c:679
#47 0x081432fb in funcall_lambda (fun=136615508, nargs=1, 
    arg_vector=0xbff7e078) at eval.c:3184
#48 0x08143726 in Ffuncall (nargs=2, args=0xbff7e074) at eval.c:3054
#49 0x081448fe in run_hook_with_args (nargs=2, args=0xbff7e074, 
    cond=until_success) at eval.c:2656
#50 0x08143907 in Ffuncall (nargs=3, args=0xbff7e070) at eval.c:2978
#51 0x0816ba71 in Fbyte_code (bytestr=136613811, vector=136613828, 
    maxdepth=24) at bytecode.c:679
#52 0x081432fb in funcall_lambda (fun=136613772, nargs=1, 
    arg_vector=0xbff7e258) at eval.c:3184
#53 0x08143726 in Ffuncall (nargs=2, args=0xbff7e254) at eval.c:3054
#54 0x08144c4d in Fapply (nargs=2, args=0xbff7e254) at eval.c:2485
#55 0x08143907 in Ffuncall (nargs=3, args=0xbff7e250) at eval.c:2978
#56 0x0816ba71 in Fbyte_code (bytestr=136464363, vector=136464388, 
    maxdepth=32) at bytecode.c:679
#57 0x08142e9f in Feval (form=136464349) at eval.c:2328
#58 0x08144f61 in internal_lisp_condition_case (var=137386185, 
    bodyform=136464349, handlers=136464421) at eval.c:1426
#59 0x0816be66 in Fbyte_code (bytestr=136464219, vector=136464236, 
    maxdepth=40) at bytecode.c:869
#60 0x081432fb in funcall_lambda (fun=136464180, nargs=1, 
    arg_vector=0xbff7e614) at eval.c:3184
#61 0x08143726 in Ffuncall (nargs=2, args=0xbff7e610) at eval.c:3054
#62 0x08144784 in call1 (fn=137421609, arg1=164320988) at eval.c:2782
#63 0x080e6139 in timer_check (do_it_now=1) at keyboard.c:4575
#64 0x080e62da in readable_events (flags=1) at keyboard.c:3600
#65 0x080eb67b in get_input_pending (addr=0x82f31d8, flags=1)
    at keyboard.c:6722
#66 0x080eb74b in detect_input_pending_run_timers (do_display=1)
    at keyboard.c:10239
#67 0x081722ee in wait_reading_process_output (time_limit=30, microsecs=0, 
    read_kbd=-1, do_display=1, wait_for_cell=137386185, wait_proc=0x0, 
    just_wait_proc=0) at process.c:4697
#68 0x08058b2d in sit_for (timeout=240, reading=1, do_display=1)
    at dispnew.c:6579
#69 0x080ed00d in read_char (commandflag=1, nmaps=2, maps=0xbff7ed90, 
    prev_event=137386185, used_mouse_menu=0xbff7edd8, end_time=0x0)
    at keyboard.c:2904
#70 0x080ef2bc in read_key_sequence (keybuf=0xbff7eef0, bufsize=30, 
    prompt=137386185, dont_downcase_last=0, can_return_switch_frame=1, 
    fix_current_buffer=1) at keyboard.c:9135
#71 0x080f0c2d in command_loop_1 () at keyboard.c:1618
#72 0x08141c36 in internal_condition_case (bfun=0x80f0a8c <command_loop_1>, 
    handlers=137431641, hfun=0x80ea134 <cmd_error>) at eval.c:1481
#73 0x080e4caa in command_loop_2 () at keyboard.c:1329
#74 0x08141915 in internal_catch (tag=137424825, 
    func=0x80e4c8c <command_loop_2>, arg=137386185) at eval.c:1222
#75 0x080e4ae9 in command_loop () at keyboard.c:1308
#76 0x080e4b84 in recursive_edit_1 () at keyboard.c:1006
#77 0x080e4c4e in Frecursive_edit () at keyboard.c:1067
#78 0x080e4005 in main (argc=1, argv=0xbff7f4f4) at emacs.c:1762


> Fetch the Emacs-22.1 source code, so you can debug better, go to the
> emacs/src directory (where there's a .gdbinit file which will provide
> some extra commands) and then use `xbacktrace' which will give you
> a Lisp-level backtrace (basically a more succint interpretation of
> a subset of the C backtrace before the call to the GC).

(gdb) xbacktrace
"set-face-attribute" (0x96ab091)
"face-spec-reset-face" (0x96ab091)
"face-spec-set" (0x96ab091)
"byte-code" (0x81d8d83)
"face-set-after-frame-default" (0x9cb772c)
"x-show-tip" (0x9cb4f93)
"byte-code" (0x82490fb)
"tooltip-show" (0x8543c93)
"tooltip-help-tips" (0x83058c9)
"run-hook-with-args-until-success" (0x854cfd1)
"tooltip-timeout" (0x83058c9)
"apply" (0x854d1b1)
"byte-code" (0x82247eb)
"timer-event-handler" (0x9cb56dc)
(gdb)


> Also, keep this core dump around, and try to reproduce the problem,
> accumulating core dumps and stack backtraces over time, so we may be
> able to find some pattern.

I'll keep my eyes open. But I'm not sure if there is any chance of
reproducing it actively. When I enter my office, I start my PC and open
emacs. And the last application closed before shutdown is: emacs.
So many things have happened (e.g. reading news) until the moment of the
crash.

>                             You may also want to run your Emacs
> from within GDB so you'll always get a usable "core".
> Also look at the emacs/etc/DEBUG file in the distribution.  Finally,
> recompile without optimizations so GDB is a bit less confused by
> variables that disappeared and things like that.

I'll check that. May be I can make some setup with a memory debugger.

Regards
    Jochen
-- 
  "Who desire to give up freedom in order to gain security
   will loose both in the end."                   (Benjamin Franklin)