bug#25883: 25.2; Frequent, but not reproducible, crash on startup

[John Wiegley]

This only happens when I startup my "alternate" Emacs that I use exclusively
for ERC, and it only happens maybe once or twice a week (I startup that Emacs
once a day).  But maybe this stack trace can help give some insight.

If ever this becomes reliably reproducible, I'll comment further. But what
might be causing it to happen?

0   libsystem_kernel.dylib              0x00007fffbfe71dd6 __pthread_kill + 10
1   libsystem_pthread.dylib             0x00007fffbff5d787 pthread_kill + 90
2   libsystem_c.dylib                   0x00007fffbfd88497 raise + 26
3   org.gnu.Emacs                       0x00000001000b3db8 
terminate_due_to_signal + 136
4   org.gnu.Emacs                       0x00000001000d0523 emacs_abort + 19
5   org.gnu.Emacs                       0x000000010019f5aa ns_term_shutdown + 
122
6   org.gnu.Emacs                       0x00000001000b3f8f shut_down_emacs + 271
7   org.gnu.Emacs                       0x00000001000b3d85 
terminate_due_to_signal + 85
8   org.gnu.Emacs                       0x00000001000d0523 emacs_abort + 19
9   org.gnu.Emacs                       0x000000010009a335 bidi_pop_it + 117
10  org.gnu.Emacs                       0x000000010004563b pop_it + 843
11  org.gnu.Emacs                       0x000000010001c31f set_iterator_to_next 
+ 63
12  org.gnu.Emacs                       0x000000010002afcd display_line + 6461
13  org.gnu.Emacs                       0x00000001000294c6 try_window + 422
14  org.gnu.Emacs                       0x000000010004f357 redisplay_window + 
11607
15  org.gnu.Emacs                       0x000000010004c5f6 redisplay_window_0 + 
38
16  org.gnu.Emacs                       0x000000010012fecc 
internal_condition_case_1 + 76
17  org.gnu.Emacs                       0x000000010004bc90 redisplay_windows + 
160
18  org.gnu.Emacs                       0x0000000100027921 redisplay_internal + 
5297
19  org.gnu.Emacs                       0x000000010002877e 
redisplay_preserve_echo_area + 30
20  org.gnu.Emacs                       0x0000000100171430 
wait_reading_process_output + 5088
21  org.gnu.Emacs                       0x00000001000bcc63 read_char + 7875
22  org.gnu.Emacs                       0x00000001000b8d91 read_key_sequence + 
1921
23  org.gnu.Emacs                       0x00000001000b83bd command_loop_1 + 4861
24  org.gnu.Emacs                       0x000000010012fe66 
internal_condition_case + 70
25  org.gnu.Emacs                       0x00000001000c67e0 command_loop_2 + 48
26  org.gnu.Emacs                       0x000000010012f9d6 internal_catch + 54
27  org.gnu.Emacs                       0x00000001000b678e command_loop + 158
28  org.gnu.Emacs                       0x00000001000b66a1 recursive_edit_1 + 
113
29  org.gnu.Emacs                       0x00000001000b68ca Frecursive_edit + 218
30  org.gnu.Emacs                       0x00000001000b55d2 main + 5602
31  libdyld.dylib                       0x00007fffbfd43255 start + 1

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2