I can confirm the same behaviour with the character #x2705. Removing
the noto-fonts-emoji package (on Arch) makes it go away.
#0 0x00007ffff0d60c70 in raise () at /usr/lib/libpthread.so.0
#1 0x00000000005699e3 in terminate_due_to_signal (sig=6, backtrace_limit=40)
at emacs.c:395
#2 0x0000000000591743 in emacs_abort () at sysdep.c:2426
#3 0x0000000000530e9f in x_connection_closed (dpy=0x2d86040,
error_message=0x7fffffff6fd0 "X protocol error: BadLength (poly request too
large or internal Xlib length error) on protocol request 139", ioerror=false)
at xterm.c:9816
#4 0x000000000053103c in x_error_quitter (display=0x2d86040,
event=0x7fffffff7180) at xterm.c:9904
#5 0x0000000000530f87 in x_error_handler (display=0x2d86040,
event=0x7fffffff7180) at xterm.c:9874
#6 0x00007ffff46826ed in _XError () at /usr/lib/libX11.so.6
#7 0x00007ffff467f617 in () at /usr/lib/libX11.so.6
#8 0x00007ffff467f6d5 in () at /usr/lib/libX11.so.6
#9 0x00007ffff467ffd5 in _XEventsQueued () at /usr/lib/libX11.so.6
#10 0x00007ffff4671ca7 in XPending () at /usr/lib/libX11.so.6
#11 0x00007ffff66f8f6f in () at /usr/lib/libgdk-3.so.0
#12 0x00007ffff4deca49 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#13 0x00007ffff4ded44e in () at /usr/lib/libglib-2.0.so.0
#14 0x00007ffff4ded5e9 in g_main_context_pending () at /usr/lib/libglib-2.0.so.0
#15 0x00007ffff6bb6e1f in gtk_events_pending () at /usr/lib/libgtk-3.so.0
#16 0x000000000052f7c4 in XTread_socket (terminal=0x1722e70
<bss_sbrk_buffer+10630352>, hold_quit=0x7fffffff74b0) at xterm.c:9131
#17 0x000000000057abd5 in gobble_input () at keyboard.c:6914
#18 0x000000000057b111 in handle_async_input () at keyboard.c:7151
#19 0x000000000057b130 in process_pending_signals () at keyboard.c:7165
#20 0x000000000057b170 in unblock_input_to (level=0) at keyboard.c:7180
#21 0x000000000057b194 in unblock_input () at keyboard.c:7199
#22 0x00000000006b37d7 in xftfont_open (f=0x1488c30 <bss_sbrk_buffer+7901840>,
entity=0x398c035, pixel_size=15) at xftfont.c:391
#23 0x0000000000637c3b in font_open_entity (f=0x1488c30
<bss_sbrk_buffer+7901840>, entity=0x398c035, pixel_size=15) at font.c:2903
#24 0x000000000063965a in font_open_for_lface (f=0x1488c30
<bss_sbrk_buffer+7901840>, entity=0x398c035, attrs=0x2e99270, spec=0x0) at
font.c:3332
#25 0x00000000006b6f7d in fontset_find_font (fontset=0x1515c35
<bss_sbrk_buffer+8479381>, c=9989, face=0x2e99270, charset_id=-1, fallback=true)
at fontset.c:707
#26 0x00000000006b74b9 in fontset_font (fontset=0x1515c35
<bss_sbrk_buffer+8479381>, c=9989, face=0x2e99270, id=-1) at fontset.c:788
#27 0x00000000006b7bc3 in face_for_char (f=0x1488c30 <bss_sbrk_buffer+7901840>,
face=0x2e99270, c=9989, pos=1, object=0x0) at fontset.c:990
#28 0x000000000056773e in FACE_FOR_CHAR (f=0x1488c30 <bss_sbrk_buffer+7901840>,
face=0x2e99270, character=9989, pos=1, object=0x0) at dispextern.h:1818
#29 0x000000000044c090 in get_next_display_element (it=0x7fffffff8f50) at
xdisp.c:7288
#30 0x00000000004742fb in display_line (it=0x7fffffff8f50, cursor_vpos=0) at
xdisp.c:21388
#31 0x0000000000468fde in try_window (window=0x1489c35
<bss_sbrk_buffer+7905941>, pos=..., flags=1) at xdisp.c:17610
#32 0x0000000000466aa2 in redisplay_window (window=0x1489c35
<bss_sbrk_buffer+7905941>, just_this_one_p=false) at xdisp.c:17057
#33 0x000000000045f7fa in redisplay_window_0 (window=0x1489c35
<bss_sbrk_buffer+7905941>) at xdisp.c:14814
#34 0x0000000000619482 in internal_condition_case_1 (bfun=0x45f7b8
<redisplay_window_0>, arg=0x1489c35 <bss_sbrk_buffer+7905941>,
handlers=0xd69e53 <bss_sbrk_buffer+435379>, hfun=0x45f780
<redisplay_window_error>) at eval.c:1356
#35 0x000000000045f757 in redisplay_windows (window=0x1489c35
<bss_sbrk_buffer+7905941>) at xdisp.c:14794
#36 0x000000000045e5bd in redisplay_internal () at xdisp.c:14283
#37 0x000000000045c4ab in redisplay () at xdisp.c:13503
#38 0x0000000000571b3e in read_char (commandflag=1, map=0x1641fc3
<bss_sbrk_buffer+9709091>, prev_event=0x0, used_mouse_menu=0x7fffffffe27d,
end_time=0x0)
at keyboard.c:2482
#39 0x000000000057faae in read_key_sequence (keybuf=0x7fffffffe460, bufsize=30,
prompt=0x0, dont_downcase_last=false, can_return_switch_frame=true,
fix_current_buffer=true, prevent_redisplay=false) at keyboard.c:9161
#40 0x000000000056ecf4 in command_loop_1 () at keyboard.c:1370
#41 0x00000000006193db in internal_condition_case (bfun=0x56e8a0
<command_loop_1>, handlers=0x5340, hfun=0x56e033 <cmd_error>) at eval.c:1332
#42 0x000000000056e58a in command_loop_2 (ignore=0x0) at keyboard.c:1111
#43 0x0000000000618c69 in internal_catch (tag=0xca50, func=0x56e55d
<command_loop_2>, arg=0x0) at eval.c:1097
#44 0x000000000056e528 in command_loop () at keyboard.c:1090
#45 0x000000000056dc02 in recursive_edit_1 () at keyboard.c:696
#46 0x000000000056dd86 in Frecursive_edit () at keyboard.c:767
#47 0x000000000056b838 in main (argc=3, argv=0x7fffffffe8c8) at emacs.c:1720
quit
