Current directory is /tmp/emacs/src/emacs-28.1/build/src/
GNU gdb (GDB) 11.2
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Reading symbols from /tmp/emacs/src/emacs-28.1/build/src/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 = dumb
Breakpoint 2 at 0x1b1caa: file ../../src/xterm.c, line 10285.
(gdb) Warning: 'set target-async', an alias for the command 'set mi-async', is deprecated.
Use 'set mi-async'.

run
Starting program: /tmp/emacs/src/emacs-28.1/build/src/emacs -Q -f toggle-debug-on-error --fg-daemon
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Breakpoint 31, main (argc=5, argv=0x7fffffffe7e8) at ../../src/emacs.c:1186
1186	{
(gdb) cont
Continuing.
[New Thread 0x7ffff258a640 (LWP 825)]
[New Thread 0x7ffff1bdf640 (LWP 886)]
[New Thread 0x7ffff124f640 (LWP 887)]
[Detaching after vfork from child process 921]
[Detaching after vfork from child process 922]

Thread 1 "emacs" hit Breakpoint 37, delete_frame (frame=XIL(0x555556731a1d), force=XIL(0)) at ../../src/frame.c:1965
1965	  struct frame *f = decode_any_frame (frame);
(gdb) cont
Continuing.

Thread 1 "emacs" hit Breakpoint 33, x_delete_terminal (terminal=0x555556731800) at ../../src/xterm.c:13450
13450	  struct x_display_info *dpyinfo = terminal->display_info.x;
(gdb) cont
Continuing.

Thread 1 "emacs" hit Breakpoint 34, x_delete_display (dpyinfo=0x5555567b0d50) at ../../src/xterm.c:13317
13317	  for (t = terminal_list; t; t = t->next_terminal)
(gdb) cont
Continuing.

Thread 1 "emacs" hit Breakpoint 36, delete_terminal (terminal=0x555556731800) at ../../src/terminal.c:319
319	  if (!terminal->name)
(gdb) cont
Continuing.

Thread 1 "emacs" hit Breakpoint 35, x_error_handler (display=0x5555560e7c60, event=0x7fffffffceb0) at ../../src/xterm.c:10270
10270	  if (x_error_message)
(gdb) p *event
$1 = {
  type = 0,
  display = 0x5555560e7c60,
  resourceid = 1,
  serial = 4605,
  error_code = 146 '\222',
  request_code = 139 '\213',
  minor_code = 22 '\026'
}
(gdb)