bug#55672: 29.0.50; Emacs crashes when calling start-process-shell-command xdg-open with process-connection-type set to nil

[Ihor Radchenko <yantar92@gmail.com>]

Po Lu <luangruo@yahoo.com> writes:

> Ihor Radchenko <yantar92@gmail.com> writes:
>
>> Starting program: /home/yantar92/Git/emacs/src/emacs -q -xrm Emacs.synchronous:\ true -l /home/yantar92/bug.el
>
> Did you try using -xrm "Emacs.synchronous: true" instead?

No difference.

However, I tried to play around with alternative ways to pass
parameters. Using run -q -xrm '...' appears to work.

The new backtrace:

> gdb ./emacs
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Reading symbols from ./emacs...
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not from terminal]
DISPLAY = :0
TERM = xterm-kitty
Breakpoint 1 at 0x2083b5: file emacs.c, line 420.
Breakpoint 2 at 0x1cc1d1: file xterm.c, line 21573.
(gdb) run -q -xrm 'Emacs.synchronous: true'
Starting program: /home/yantar92/Git/emacs/src/emacs -q -xrm 'Emacs.synchronous: true'
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff049d640 (LWP 15165)]
[Detaching after vfork from child process 15505]
[Detaching after vfork from child process 15609]
[Detaching after vfork from child process 15736]
[Detaching after vfork from child process 15825]
[Detaching after vfork from child process 15948]
[Detaching after vfork from child process 16048]
[Detaching after vfork from child process 16155]
[Detaching after vfork from child process 16427]
[Detaching after vfork from child process 16536]
emacs: /var/tmp/portage/x11-libs/cairo-1.16.0-r5/work/cairo-1.16.0/src/cairo-xcb-screen.c:219: _get_screen_index: Assertion `!"reached"' failed.

Thread 1 "emacs" received signal SIGABRT, Aborted.
0x00007ffff42e2ebc in ?? () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff42e2ebc in  () at /lib64/libc.so.6
#1  0x00007ffff4296c72 in raise () at /lib64/libc.so.6
#2  0x00007ffff428146b in abort () at /lib64/libc.so.6
#3  0x00007ffff4281397 in  () at /lib64/libc.so.6
#4  0x00007ffff428fe42 in  () at /lib64/libc.so.6
#5  0x00007ffff6c7b2f1 in  () at /usr/lib64/libcairo.so.2
#6  0x00007ffff6c7dcfe in cairo_xcb_surface_create () at /usr/lib64/libcairo.so.2
#7  0x00005555556fb83b in x_begin_cr_clip (f=0x5555571d4dd0, gc=0x0) at xterm.c:4681
#8  0x00005555556fd699 in x_clear_window (f=0x5555571d4dd0) at xterm.c:5408
#9  0x0000555555706751 in x_clear_frame (f=0x5555571d4dd0) at xterm.c:9297
#10 0x00005555556dae3a in clear_frame (f=0x5555571d4dd0) at terminal.c:141
#11 0x000055555559ff07 in redraw_frame (f=0x5555571d4dd0) at dispnew.c:3115
#12 0x00005555555f701b in clear_garbaged_frames () at xdisp.c:12739
#13 0x00005555555f7340 in echo_area_display (update_frame_p=true) at xdisp.c:12791
#14 0x00005555555f3109 in message3_nolog (m=XIL(0x5555598603f4)) at xdisp.c:11752
#15 0x00005555555f2db1 in message3 (m=XIL(0x5555598603f4)) at xdisp.c:11682
#16 0x00005555558498d4 in Fmessage (nargs=2, args=0x7fffffffae88) at editfns.c:2881
#17 0x000055555585dfc8 in funcall_subr (subr=0x555555e83120 <Smessage>, numargs=2, args=0x7fffffffae88) at eval.c:3008
#18 0x000055555585d863 in funcall_general (fun=XIL(0x555555e83125), numargs=2, args=0x7fffffffae88) at eval.c:2889
#19 0x000055555585db40 in Ffuncall (nargs=3, args=0x7fffffffae80) at eval.c:2943
#20 0x00007fffef4744c7 in F7365727665722d65786563757465_server_execute_0 () at /home/yantar92/.emacs.d/eln-cache/29.0.50-9c7bac46/server-0cc44189-d75986a8.eln
#21 0x000055555585df1e in funcall_subr (subr=0x55555703a310, numargs=7, args=0x7ffff049e038) at eval.c:2993
#22 0x00005555558c613f in exec_byte_code (fun=XIL(0x5555570354dd), args_template=0, nargs=0, args=0x7fffffffb5c8) at bytecode.c:809
#23 0x000055555585e15c in fetch_and_exec_byte_code (fun=XIL(0x5555570354dd), args_template=0, nargs=0, args=0x7fffffffb5c8) at eval.c:3030
#24 0x000055555585e65b in funcall_lambda (fun=XIL(0x5555570354dd), nargs=0, arg_vector=0x7fffffffb5c8) at eval.c:3102
#25 0x000055555585d8af in funcall_general (fun=XIL(0x5555570354dd), numargs=0, args=0x7fffffffb5c8) at eval.c:2893
#26 0x000055555585db40 in Ffuncall (nargs=1, args=0x7fffffffb5c0) at eval.c:2943
#27 0x00007fffef47106f in F7365727665722d657865637574652d636f6e74696e756174696f6e_server_execute_continuation_0 ()
    at /home/yantar92/.emacs.d/eln-cache/29.0.50-9c7bac46/server-0cc44189-d75986a8.eln
#28 0x000055555585dd9d in funcall_subr (subr=0x55555703a260, numargs=1, args=0x7fffffffb7e8) at eval.c:2981
#29 0x000055555585d863 in funcall_general (fun=XIL(0x55555703a265), numargs=1, args=0x7fffffffb7e8) at eval.c:2889
#30 0x000055555585db40 in Ffuncall (nargs=2, args=0x7fffffffb7e0) at eval.c:2943
#31 0x00007fffef4723c9 in F7365727665722d70726f636573732d66696c746572_server_process_filter_0 () at /home/yantar92/.emacs.d/eln-cache/29.0.50-9c7bac46/server-0cc44189-d75986a8.eln
#32 0x000055555585ddc1 in funcall_subr (subr=0x55555703a2b8, numargs=2, args=0x7fffffffb9b8) at eval.c:2983
#33 0x000055555585d863 in funcall_general (fun=XIL(0x55555703a2bd), numargs=2, args=0x7fffffffb9b8) at eval.c:2889
#34 0x000055555585db40 in Ffuncall (nargs=3, args=0x7fffffffb9b0) at eval.c:2943
#35 0x000055555585cd73 in Fapply (nargs=2, args=0x7fffffffba60) at eval.c:2614
#36 0x000055555585d49d in apply1 (fn=XIL(0x10a5af0), arg=XIL(0x5555574e4d93)) at eval.c:2830
#37 0x00005555558ed2e2 in read_process_output_call (fun_and_args=XIL(0x5555574e4da3)) at process.c:5999
#38 0x0000555555859349 in internal_condition_case_1
    (bfun=0x5555558ed249 <read_process_output_call>, arg=XIL(0x5555574e4da3), handlers=XIL(0x90), hfun=0x5555558ed2e4 <read_process_output_error_handler>) at eval.c:1502
#39 0x00005555558edd04 in read_and_dispose_of_process_output
    (p=0x555557c8e308, chars=0x7fffffffbb70 "-env GCC_SPECS= -env GSETTINGS_BACKEND=dconf -env LC_COLLATE=C -env XDG_DATA_DIRS=/usr/local/share:/usr/share -env PATH=/home/yantar92/.pyenv/bin:/home/yantar92/.local/bin:/home/yantar92/.local/bin:/u"..., nbytes=819, coding=0x555555fee820) at process.c:6223
#40 0x00005555558ed8c4 in read_process_output (proc=XIL(0x555557c8e30d), channel=10) at process.c:6133
#41 0x00005555558ec953 in wait_reading_process_output (time_limit=30, nsecs=0, read_kbd=-1, do_display=true, wait_for_cell=XIL(0), wait_proc=0x0, just_wait_proc=0) at process.c:5817
#42 0x00005555555a9238 in sit_for (timeout=make_fixnum(30), reading=true, display_option=1) at dispnew.c:6201
#43 0x000055555576a803 in read_char (commandflag=1, map=XIL(0x5555574e5743), prev_event=XIL(0), used_mouse_menu=0x7fffffffd3ed, end_time=0x0) at keyboard.c:2835
#44 0x0000555555780154 in read_key_sequence
--Type <RET> for more, q to quit, c to continue without paging--c
    (keybuf=0x7fffffffd5c0, prompt=XIL(0), dont_downcase_last=false, can_return_switch_frame=true, fix_current_buffer=true, prevent_redisplay=false) at keyboard.c:9957
#45 0x0000555555765a92 in command_loop_1 () at keyboard.c:1399
#46 0x0000555555859268 in internal_condition_case (bfun=0x5555557655db <command_loop_1>, handlers=XIL(0x90), hfun=0x5555557649a9 <cmd_error>) at eval.c:1478
#47 0x0000555555765194 in command_loop_2 (handlers=XIL(0x90)) at keyboard.c:1140
#48 0x000055555585834b in internal_catch (tag=XIL(0xf5d0), func=0x55555576516a <command_loop_2>, arg=XIL(0x90)) at eval.c:1208
#49 0x0000555555765126 in command_loop () at keyboard.c:1118
#50 0x000055555576444b in recursive_edit_1 () at keyboard.c:727
#51 0x0000555555764677 in Frecursive_edit () at keyboard.c:810
#52 0x000055555575f9dc in main (argc=4, argv=0x7fffffffda68) at emacs.c:2488

Lisp Backtrace:
"message" (0xffffae88)
"server-execute" (0xf049e038)
0x570354d8 PVEC_COMPILED
"server-execute-continuation" (0xffffb7e8)
"server-process-filter" (0xffffb9b8)
(gdb) 
quit
A debugging session is active.

	Inferior 1 [process 15152] will be killed.

Quit anyway? (y or n) y