Re: [ANNOUNCEMENT] Updated: emacs-24.3.93-1 [TEST]

Thu, 21 Aug 2014 07:34:17 -0700 

On 8/21/2014 10:06 AM, Markus Hoenicka wrote:

At 2014-08-21 15:58, Ken Brown was heard to say:

[...]

Thread 1 (Thread 10724.0x3340):
#0  0x000007fefdba3ca3 in KERNELBASE!DebugBreak () from
/cygdrive/c/Windows/system32/KERNELBASE.dll
#1  0x0000000100577794 in emacs_abort () at
/usr/src/debug/emacs-24.3.93-1/src/w32fns.c:8478
#2  0x00000001004ca456 in overlays_at (pos=pos@entry=23459,
extend=extend@entry=false, vec_ptr=0x42a2d0,
vec_ptr@entry=0x100927f60 <Qnil>,
     len_ptr=len_ptr@entry=0x42a2d8, next_ptr=next_ptr@entry=0x0,
prev_ptr=prev_ptr@entry=0x0, change_req=change_req@entry=false)
     at /usr/src/debug/emacs-24.3.93-1/src/buffer.c:2854
#3  0x000000010056968f in get_char_property_and_overlay
(position=position@entry=93836, prop=prop@entry=4305239426,
object=object@entry=25772655621,
     overlay=overlay@entry=0x0) at
/usr/src/debug/emacs-24.3.93-1/src/textprop.c:663
#4  0x00000001005697b8 in Fget_char_property
(position=position@entry=93836,
prop=prop@entry=4305239426, object=object@entry=25772655621)
     at /usr/src/debug/emacs-24.3.93-1/src/textprop.c:703
#5  0x000000010056622a in get_local_map (position=<optimized out>,
position@entry=23459, buffer=0x6002b8400, type=4305239426)
     at /usr/src/debug/emacs-24.3.93-1/src/intervals.c:2234
#6  0x00000001004c0688 in Fcurrent_active_maps (olp=4304926818,
position=position@entry=4304926770) at
/usr/src/debug/emacs-24.3.93-1/src/keymap.c:1594
#7  0x00000001004c09f6 in Fkey_binding (key=key@entry=4304949141,
accept_default=accept_default@entry=4304926770, no_remap=4304926818,
     position=4304926770) at
/usr/src/debug/emacs-24.3.93-1/src/keymap.c:1721
#8  0x00000001004c0ba8 in Fcommand_remapping (command=<optimized out>,
position=<optimized out>, keymaps=<optimized out>)
     at /usr/src/debug/emacs-24.3.93-1/src/keymap.c:1248
#9  0x00000001004c0bca in Fcommand_remapping (command=<optimized out>,
position=<optimized out>, keymaps=<optimized out>)
     at /usr/src/debug/emacs-24.3.93-1/src/keymap.c:1253
#10 0x00000001004b8cfa in read_key_sequence
(keybuf=keybuf@entry=0x42a710,
prompt=<optimized out>,
dont_downcase_last=dont_downcase_last@entry=false,
     can_return_switch_frame=can_return_switch_frame@entry=true,
fix_current_buffer=fix_current_buffer@entry=true,
     prevent_redisplay=prevent_redisplay@entry=false, bufsize=30) at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:9708
#11 0x00000001004b9c54 in command_loop_1 () at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:1452
#12 0x000000010051a0dd in internal_condition_case
(bfun=bfun@entry=0x1004b9a30 <command_loop_1>, handlers=<optimized out>,
     hfun=hfun@entry=0x1004b0560 <cmd_error>) at
/usr/src/debug/emacs-24.3.93-1/src/eval.c:1354
#13 0x00000001004ab9ea in command_loop_2
(ignore=ignore@entry=4304926770) at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:1177
#14 0x0000000100519fdc in internal_catch (tag=4304985026,
func=func@entry=0x1004ab9c0 <command_loop_2>, arg=4304926770)
     at /usr/src/debug/emacs-24.3.93-1/src/eval.c:1118
#15 0x00000001004b0154 in command_loop () at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:1156
#16 recursive_edit_1 () at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:777
#17 0x00000001004b0476 in Frecursive_edit () at
/usr/src/debug/emacs-24.3.93-1/src/keyboard.c:848
#18 0x00000001005b5953 in main (argc=<optimized out>, argv=<optimized
out>)
at /usr/src/debug/emacs-24.3.93-1/src/emacs.c:1646


Thanks for the report.  The abort comes from here (in buffer.c):



Hi,

I'm just wondering how this backtrace was generated. As you may remember
I've been plagued by these sporadic Emacs crashes for quite a while, but
I never managed to get a backtrace with this amount of information. Is
there something particularly dumb that I'm doing? Would you mind
pointing me to some concise instructions?



No, you're not doing anything dumb.  Achim was using emacs-w32, which 
prompts the user to attach gdb when emacs_abort is called.  But you use 
emacs-X11, which doesn't do that.  I'll look into adding that feature to 
emacs-X11.  In the meantime, you can simply run emacs-X11 under gdb from 
the start, with a breakpoint at emacs_abort.  You'll have to use the 
previous version of gdb, because the current version (gdb-7.8-1) hangs 
when you try to debug the GUI versions of emacs; see the thread starting at


  https://cygwin.com/ml/cygwin/2014-08/msg00243.html

Ken

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