Re: MPS: Crash while completing symbol with corfu

[Gerd Möllmann]

Ihor Radchenko <yantar92@posteo.net> writes:

> Thread 1 "emacs" hit Breakpoint 1, terminate_due_to_signal (sig=sig@entry=11, 
> backtrace_limit=backtrace_limit@entry=40) at emacs.c:443
> 443   {
> (gdb) bt
> #0  terminate_due_to_signal (sig=sig@entry=11, 
> backtrace_limit=backtrace_limit@entry=40) at emacs.c:443
> #1  0x00005555556e446b in handle_fatal_signal (sig=sig@entry=11) at 
> sysdep.c:1800
> #2  0x00005555556e44d0 in deliver_thread_signal (sig=11, 
> handler=0x5555556e4457 <handle_fatal_signal>) at sysdep.c:1792
> #3  deliver_fatal_thread_signal (sig=sig@entry=11) at sysdep.c:1812
> #4  0x00005555556e44fd in handle_sigsegv (sig=11, siginfo=<optimized out>, 
> arg=<optimized out>) at sysdep.c:1950
> #5  0x00007ffff3048050 in <signal handler called> () at /lib64/libc.so.6
> #6  0x00007ffff304822b in kill () at /lib64/libc.so.6
> #7  0x0000555555880af9 in sigHandle (sig=<optimized out>, info=<optimized 
> out>, uap=<optimized out>) at /home/yantar92/Dist/mps/code/protsgix.c:114
> #8  0x00007ffff3048050 in <signal handler called> () at /lib64/libc.so.6
> #9  qttip_cb (widget=0x5555913b54b0, xpos=222, ypos=80, keyboard_mode=0, 
> tooltip=0x555556741b10, user_data=0x7ffee6e6b3c8) at gtkutil.c:855
> #10 0x00007ffff7486d63 in ??? () at /usr/lib64/libgtk-3.so.0
> #11 0x00007ffff6e08d30 in g_closure_invoke () at 
> /usr/lib64/libgobject-2.0.so.0
> #12 0x00007ffff6e1c2ec in ??? () at /usr/lib64/libgobject-2.0.so.0
> #13 0x00007ffff6e1d541 in ??? () at /usr/lib64/libgobject-2.0.so.0
> #14 0x00007ffff6e23976 in g_signal_emit_valist () at 
> /usr/lib64/libgobject-2.0.so.0
> #15 0x00007ffff6e23a33 in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
> #16 0x00007ffff777ef9d in ??? () at /usr/lib64/libgtk-3.so.0
> #17 0x00007ffff77352e9 in ??? () at /usr/lib64/libgtk-3.so.0
> #18 0x00007ffff77357cd in ??? () at /usr/lib64/libgtk-3.so.0
> #19 0x00007ffff7614fd5 in gtk_main_do_event () at /usr/lib64/libgtk-3.so.0
> #20 0x00007ffff7c71409 in ??? () at /usr/lib64/libgdk-3.so.0
> #21 0x00007ffff7cc8e06 in ??? () at /usr/lib64/libgdk-3.so.0
> #22 0x00007ffff6d07e04 in ??? () at /usr/lib64/libglib-2.0.so.0
> #23 0x00007ffff6d0af27 in ??? () at /usr/lib64/libglib-2.0.so.0
> #24 0x00007ffff6d0b540 in g_main_context_iteration () at 
> /usr/lib64/libglib-2.0.so.0
> #25 0x00007ffff7614239 in gtk_main_iteration () at /usr/lib64/libgtk-3.so.0
> #26 0x00005555556834aa in XTread_socket (terminal=<optimized out>, 
> hold_quit=0x7fffffffcd40) at xterm.c:25802
> #27 0x00005555556d1bb5 in gobble_input () at keyboard.c:7934
> #28 0x00005555555acbb2 in sit_for (timeout=timeout@entry=make_fixnum(37), 
> reading=reading@entry=true, display_option=display_option@entry=1)
>     at dispnew.c:6358
> #29 0x00005555556d5efc in read_char
>     (commandflag=1, map=map@entry=XIL(0x7ffee68ac24b), prev_event=XIL(0), 
> used_mouse_menu=used_mouse_menu@entry=0x7fffffffd2fb, 
> end_time=end_time@entry=0x0)
>     at keyboard.c:2934
> #30 0x00005555556d768a in read_key_sequence
>     (keybuf=keybuf@entry=0x7fffffffd460, prompt=prompt@entry=XIL(0),
> dont_downcase_last=dont_downcase_last@entry=false,
> can_return_switch_frame=can_return_switch_frame@entry=true,
> fix_current_buffer=fix_current_buffer@entry=true,
> prevent_redisplay=prevent_redisplay@entry=false,
> disable_text_conversion_p=false)
>     at keyboard.c:10759
> #31 0x00005555556da3f3 in command_loop_1 () at keyboard.c:1440
> #32 0x0000555555748c92 in internal_condition_case
>     (bfun=bfun@entry=0x5555556d9208 <command_loop_1>, 
> handlers=handlers@entry=XIL(0x90), hfun=hfun@entry=0x5555556ca60c 
> <cmd_error>) at eval.c:1629
> #33 0x00005555556c5838 in command_loop_2 (handlers=handlers@entry=XIL(0x90)) 
> at keyboard.c:1179
> --Type <RET> for more, q to quit, c to continue without paging--c
> #34 0x0000555555748bc4 in internal_catch (tag=tag@entry=XIL(0x12360), 
> func=func@entry=0x5555556c5811 <command_loop_2>, arg=arg@entry=XIL(0x90))
>     at eval.c:1308
> #35 0x00005555556c57ee in command_loop () at keyboard.c:1157
> #36 0x00005555556ca1c1 in recursive_edit_1 () at keyboard.c:765
> #37 0x00005555556ca52e in Frecursive_edit () at keyboard.c:848
> #38 0x00005555556c4aad in main (argc=1, argv=<optimized out>) at emacs.c:2651
> (gdb) xbacktrace 
> (gdb) c
> Continuing.
> Fatal error 11: Segmentation fault
> [Thread 0x7fffd74006c0 (LWP 24071) exited]
> [Thread 0x7fffdd2006c0 (LWP 24069) exited]
> [Thread 0x7fffddc006c0 (LWP 24068) exited]
> [Thread 0x7fffde6006c0 (LWP 24067) exited]
> [Thread 0x7ffff34142c0 (LWP 24055) exited]
> [Thread 0x7fffdf0006c0 (LWP 24066) exited]
> [New process 24055]
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> The program no longer exists.
> (gdb) bt
> No stack.

Not the slightest idea what's happening there. Aoparently Gtk gets
involved somehow and then everything is optimized out.

Maybe you could buld with CFLAGS="-g -O0" or something? Otherwise one
can't see much.