Re: X protocol error

[Robert Pluim]

>>>>> On Wed, 17 Aug 2022 15:08:03 +0100, Colin Baxter <m43cap@yandex.com> said:

    Colin> Dear Po,
    Colin> Thanks for your reply. I have narrowed the problem to the configure 
option
    Colin> "./configure --with-x-toolkit=lucid <RET>". If I run only 
"./configure
    Colin> <RET>", effectively using the gtk3 default setting then emacs builds
    Colin> successfully.

    Colin> gdb$ run -q -xrm "Emacs.synchronous: true"
    Colin> Starting program:  -q -xrm "Emacs.synchronous: true"
    Colin> No executable file specified.
    Colin> Use the "file" or "exec-file" command.

I think Po Lu meant:
    $ cd src
    $ gdb emacs
    gdb$ run -q -xrm "Emacs.synchronous: true"

I can reproduce this with a lucid build (with XI2 enabled):

Thread 1 "emacs" hit Breakpoint 2, x_error_quitter (display=0x555555f79210, 
    event=0x7fffffffc1c0) at xterm.c:24762
24762     if (event->error_code == BadName)
(gdb) bt
#0  x_error_quitter (display=0x555555f79210, event=0x7fffffffc1c0)
    at xterm.c:24762
#1  0x00005555556e5f2c in x_error_handler
    (display=0x555555f79210, event=0x7fffffffc1c0) at xterm.c:24743
#2  0x00007ffff7992864 in _XError () at /lib/x86_64-linux-gnu/libX11.so.6
#3  0x00007ffff798f327 in  () at /lib/x86_64-linux-gnu/libX11.so.6
#4  0x00007ffff798f3c5 in  () at /lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007ffff799062d in _XReply () at /lib/x86_64-linux-gnu/libX11.so.6
#6  0x00007ffff798be2b in XSync () at /lib/x86_64-linux-gnu/libX11.so.6
#7  0x00007ffff798becb in  () at /lib/x86_64-linux-gnu/libX11.so.6
#8  0x00007ffff5b8dac1 in XISelectEvents () at /lib/x86_64-linux-gnu/libXi.so.6
#9  0x00005555556ebc0d in xi_select_hierarchy_events (dpyinfo=0x555555f8bce0)
    at xterm.c:27661
#10 0x00005555556ecbf1 in x_term_init
    (display_name=XIL(0x555555f65944), xrm_option=0x555555f0af88 
"Emacs.synchronous: true", resource_name=0x555555f636f0 "emacs") at 
xterm.c:28299
#11 0x000055555570082e in Fx_open_connection
    (display=XIL(0x555555f65944), xrm_string=XIL(0x555555f499b4), 
must_succeed=XIL(0x30)) at xfns.c:7260
#12 0x00005555557e3b05 in funcall_subr
    (subr=0x555555dd7a00 <Sx_open_connection>, numargs=3, args=0x7ffff18a31d0)
    at eval.c:3056
#13 0x00005555558331e1 in exec_byte_code
    (fun=XIL(0x7ffff1ff945d), args_template=513, nargs=2, args=0x7ffff18a3348)
    at bytecode.c:809
#14 0x00005555557e3dbd in fetch_and_exec_byte_code
    (fun=XIL(0x7ffff22ec765), args_template=256, nargs=0, args=0x7ffff18a3150)
    at eval.c:3101
#15 0x00005555557e4131 in funcall_lambda
    (fun=XIL(0x7ffff22ec765), nargs=0, arg_vector=0x7ffff18a3150)
    at eval.c:3173
#16 0x00005555557e36a6 in funcall_general
    (fun=XIL(0x7ffff22ec765), numargs=0, args=0x7ffff18a3150) at eval.c:2964
#17 0x00005555557e3902 in Ffuncall (nargs=1, args=0x7ffff18a3148)
    at eval.c:3014
#18 0x00005555557e2a58 in Fapply (nargs=2, args=0x7ffff18a3148) at eval.c:2638
#19 0x00005555557e3ce9 in funcall_subr
    (subr=0x555555de0600 <Sapply>, numargs=2, args=0x7ffff18a3148)
    at eval.c:3079
#20 0x00005555558331e1 in exec_byte_code
    (fun=XIL(0x7ffff23d5bed), args_template=770, nargs=3, args=0x7ffff18a33c0)
    at bytecode.c:809
#21 0x00005555557e3dbd in fetch_and_exec_byte_code
    (fun=XIL(0x7ffff22ea715), args_template=0, nargs=0, args=0x7fffffffdb40)
    at eval.c:3101
#22 0x00005555557e4131 in funcall_lambda
    (fun=XIL(0x7ffff22ea715), nargs=0, arg_vector=0x7fffffffdb40)
    at eval.c:3173
#23 0x00005555557e3f4f in apply_lambda
    (fun=XIL(0x7ffff22ea715), args=XIL(0), count=...) at eval.c:3123
#24 0x00005555557e2651 in eval_sub (form=XIL(0x7ffff2730653)) at eval.c:2564
#25 0x00005555557e1c39 in Feval (form=XIL(0x7ffff2730653), lexical=XIL(0))
    at eval.c:2375
#26 0x0000555555720edc in top_level_2 () at keyboard.c:1141
#27 0x00005555557dfb8a in internal_condition_case
    (bfun=0x555555720eb9 <top_level_2>, handlers=XIL(0x90), hfun=0x555555720807 
<cmd_error>) at eval.c:1497
#28 0x0000555555720f24 in top_level_1 (ignore=XIL(0)) at keyboard.c:1149
#29 0x00005555557df252 in internal_catch
    (tag=XIL(0xf7e0), func=0x555555720ede <top_level_1>, arg=XIL(0))
    at eval.c:1220
#30 0x0000555555720dfd in command_loop () at keyboard.c:1109
#31 0x00005555557203b2 in recursive_edit_1 () at keyboard.c:719
#32 0x000055555572055b in Frecursive_edit () at keyboard.c:802
#33 0x000055555571ca50 in main (argc=4, argv=0x7fffffffe0f8) at emacs.c:2517

Lisp Backtrace:
"x-open-connection" (0xf18a31d0)
0xf22ec760 PVEC_COMPILED
"apply" (0xf18a3148)
"window-system-initialization" (0xf18a30b8)
"command-line" (0xf18a3040)
"normal-top-level" (0xffffdb40)

Robert
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