bug#26980: 25.2; Freeze & redisplay_internal & macOS

[Robert Vojta]

Hi,

rebuild from source with debug info:

 * git, master, commit df9bec3b39b12b33db8f5a97d86797f6636e5e7d (Fri May 19 
10:01:23 2017 +0300)

I trashed the yesterday’s freeze backtrace (no debug info), but it was stuck in 
assq_no_quit & lot of functions about faces (merge_face, …). Today’s one 
contains:

(lldb) attach 72569
Process 72569 stopped
* thread #1: tid = 0x68a63f, 0x000000010035e403 
Emacs`lookup_char_property(plist=4369609187, prop=13392, textprop=true) + 131 
at intervals.c:1760, queue = 'com.apple.main-thread', stop reason = signal 
SIGSTOP
    frame #0: 0x000000010035e403 Emacs`lookup_char_property(plist=4369609187, 
prop=13392, textprop=true) + 131 at intervals.c:1760
   1757       tem = XCAR (tail);
   1758       if (EQ (prop, tem))
   1759         return Fcar (XCDR (tail));
-> 1760       if (EQ (tem, Qcategory))
   1761         {
   1762           tem = Fcar (XCDR (tail));
   1763           if (SYMBOLP (tem))


(lldb) thread backtrace
* thread #1: tid = 0x68a63f, 0x000000010035e403 
Emacs`lookup_char_property(plist=4369609187, prop=13392, textprop=true) + 131 
at intervals.c:1760, queue = 'com.apple.main-thread', stop reason = signal 
SIGSTOP
  * frame #0: 0x000000010035e403 Emacs`lookup_char_property(plist=4369609187, 
prop=13392, textprop=true) + 131 at intervals.c:1760
    frame #1: 0x000000010035e372 Emacs`textget(plist=4369609187, prop=13392) + 
34 at intervals.c:1746
    frame #2: 0x0000000100364c5b 
Emacs`Fnext_single_property_change(position=19506, prop=13392, 
object=4621909941, limit=21506) + 379 at textprop.c:1027
    frame #3: 0x000000010036ceec Emacs`find_composition(pos=4876, limit=5376, 
start=0x00007fff5fbf65c0, end=0x00007fff5fbf65b8, prop=0x00007fff5fbf65a8, 
object=0) + 204 at composite.c:434
    frame #4: 0x000000010036e662 
Emacs`composition_compute_stop_pos(cmp_it=0x00007fff5fbf8950, charpos=4876, 
bytepos=4876, endpos=5376, string=0) + 338 at composite.c:979
    frame #5: 0x00000001000800fc Emacs`compute_stop_pos(it=0x00007fff5fbf80d0) 
+ 1212 at xdisp.c:3554
    frame #6: 0x000000010007f099 Emacs`handle_stop(it=0x00007fff5fbf80d0) + 665 
at xdisp.c:3452
    frame #7: 0x0000000100084a2d 
Emacs`next_element_from_buffer(it=0x00007fff5fbf80d0) + 621 at xdisp.c:8352
    frame #8: 0x000000010003b4a8 
Emacs`get_next_display_element(it=0x00007fff5fbf80d0) + 56 at xdisp.c:6948
    frame #9: 0x000000010005ac19 Emacs`display_line(it=0x00007fff5fbf80d0, 
cursor_vpos=24) + 1065 at xdisp.c:20809
    frame #10: 0x000000010005a529 Emacs`try_window(window=4361665229, 
pos=(charpos = 4022, bytepos = 4022), flags=0) + 249 at xdisp.c:17457
    frame #11: 0x000000010008f1a9 Emacs`redisplay_window(window=4361665229, 
just_this_one_p=false) + 3977 at xdisp.c:16647
    frame #12: 0x000000010008e20d Emacs`redisplay_window_0(window=4361665229) + 
61 at xdisp.c:14664
    frame #13: 0x000000010028725a 
Emacs`internal_condition_case_1(bfun=(Emacs`redisplay_window_0 at 
xdisp.c:14662), arg=4361665229, handlers=4337042083, 
hfun=(Emacs`redisplay_window_error at xdisp.c:14655)) + 138 at eval.c:1350
    frame #14: 0x000000010008c7fb Emacs`redisplay_windows(window=4361665229) + 
187 at xdisp.c:14644
    frame #15: 0x000000010008c7aa Emacs`redisplay_windows(window=4361664733) + 
106 at xdisp.c:14638
    frame #16: 0x000000010005712e Emacs`redisplay_internal + 6270 at 
xdisp.c:14134
    frame #17: 0x0000000100058a19 Emacs`redisplay + 9 at xdisp.c:13362
    frame #18: 0x0000000100181735 Emacs`read_char(commandflag=1, 
map=4870821907, prev_event=0, used_mouse_menu=0x00007fff5fbff337, 
end_time=0x0000000000000000) + 1829 at keyboard.c:2482
    frame #19: 0x000000010017d710 
Emacs`read_key_sequence(keybuf=0x00007fff5fbff650, bufsize=30, prompt=0, 
dont_downcase_last=false, can_return_switch_frame=true, 
fix_current_buffer=true, prevent_redisplay=false) + 1744 at keyboard.c:9122
    frame #20: 0x000000010017c2d2 Emacs`command_loop_1 + 1442 at keyboard.c:1370
    frame #21: 0x000000010028719f 
Emacs`internal_condition_case(bfun=(Emacs`command_loop_1 at keyboard.c:1261), 
handlers=17520, hfun=(Emacs`cmd_error at keyboard.c:940)) + 127 at eval.c:1326
    frame #22: 0x0000000100191c4c Emacs`command_loop_2(ignore=0) + 44 at 
keyboard.c:1112
    frame #23: 0x0000000100286958 Emacs`internal_catch(tag=45312, 
func=(Emacs`command_loop_2 at keyboard.c:1108), arg=0) + 72 at eval.c:1091
    frame #24: 0x000000010017b288 Emacs`command_loop + 280 at keyboard.c:1091
    frame #25: 0x000000010017b0f0 Emacs`recursive_edit_1 + 192 at keyboard.c:697
    frame #26: 0x000000010017b428 Emacs`Frecursive_edit + 312 at keyboard.c:768
    frame #27: 0x0000000100179124 Emacs`main(argc=1, argv=0x00007fff5fbffca0) + 
6916 at emacs.c:1690
    frame #28: 0x00007fffe7c33235 libdyld.dylib`start + 1
(lldb)