Thanks! From what I can tell, the bug is gone. I've been programming in
Emacs for a while and haven't encountered it.

Thank you so, so much, Eli!

Eli Zaretskii <eliz@gnu.org> 于2021年8月18日周三 下午9:16写道：

> > From: Amai Kinono <amaikinono@gmail.com>
> > Date: Wed, 18 Aug 2021 20:05:10 +0800
> > Cc: 44448@debbugs.gnu.org
> >
> > Thanks. Now the chance of the bug becomes very low, but I managed to get
> another backtrace. I think we
> > are close to the end.
> >
> > Thread 1 "emacs" hit Breakpoint 1, signal_or_quit (error_symbol=...,
> data=..., keyboard_quit=false) at
> > eval.c:1793
> > 1793 {
> > #0  signal_or_quit (error_symbol=..., data=..., keyboard_quit=false) at
> eval.c:1793
> > #1  0x0000560d8c635853 in quit () at eval.c:1783
> > #2  0x0000560d8c635731 in process_quit_flag () at eval.c:1730
> > #3  0x0000560d8c63577d in maybe_quit () at eval.c:1750
> > #4  0x0000560d8c64aff7 in internal_equal (o1=..., o2=...,
> equal_kind=EQUAL_PLAIN, depth=0, ht=...) at
> > fns.c:2591
> > #5  0x0000560d8c64a8e6 in Fequal (o1=..., o2=...) at fns.c:2500
> > #6  0x0000560d8c711c0d in search_image_cache (f=0x560d8d870a78, spec=...,
> > hash=4330934697943008934, foreground=15457202, background=1908769,
> font_size=20,
> > font_family=0x560d8d81e1e8 "DejaVu Sans Mono", ignore_colors=false) at
> image.c:1623
> > #7  0x0000560d8c713b6a in lookup_image (f=0x560d8d870a78, spec=...,
> face_id=18) at image.c:2450
> > #8  0x0000560d8c3e60ea in handle_single_display_spec (it=0x7ffeb78b4820,
> spec=..., object=...,
> > overlay=..., position=0x7ffeb78b4970, bufpos=0, display_replaced=0,
> frame_window_p=true,
> > enable_eval_p=true) at xdisp.c:5791
> > #9  0x0000560d8c3e380f in handle_display_spec (it=0x7ffeb78b4820,
> spec=..., object=..., overlay=...,
> > position=0x7ffeb78b4970, bufpos=0, frame_window_p=true) at xdisp.c:5278
> > #10 0x0000560d8c3e3001 in handle_display_prop (it=0x7ffeb78b4820) at
> xdisp.c:5187
> > #11 0x0000560d8c3df423 in handle_stop (it=0x7ffeb78b4820) at xdisp.c:3854
> > #12 0x0000560d8c3ee685 in next_element_from_string (it=0x7ffeb78b4820)
> at xdisp.c:8524
> > #13 0x0000560d8c3ebab6 in get_next_display_element (it=0x7ffeb78b4820)
> at xdisp.c:7500
> > #14 0x0000560d8c42f88f in display_string (string=0x0, lisp_string=...,
> face_string=..., face_string_pos=0,
> > start=0, it=0x7ffeb78b4820, field_width=0, precision=11, max_x=300,
> multibyte=0) at xdisp.c:27323
> > #15 0x0000560d8c42bd6d in display_mode_element (it=0x7ffeb78b4820,
> depth=4, field_width=-23,
> > precision=-23, elt=..., props=..., risky=false) at xdisp.c:25901
>
> Thanks, plugged this one.
>