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bug#25178: 26.0.50; Crash when pressing C-g in TTY mode


From: Elias Martenson
Subject: bug#25178: 26.0.50; Crash when pressing C-g in TTY mode
Date: Tue, 13 Dec 2016 10:52:17 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

> Eli Zaretskii <address@hidden> writes:
>
> > From: Elias Martenson <address@hidden>
> > Date: Mon, 12 Dec 2016 12:33:01 +0800
> > 
> > Build 2783e0e3899cf92910e97dc8bfda3e47b3df1478 with default options.
> > 
> > Start emacs -nw -Q
> > 
> > Press C-g
> > 
> > This causes the application to crash immediately.
> 
> Doesn't happen to me.
> 
> Can you run this under GDB and show the backtrace from the crash?

It still happens on a completely fresh checkout and install of
8db7b65d66f01e90a05cc9f11c67667233d84ca0

Here is the stack trace:

Thread 1 "emacs" received signal SIGINT, Interrupt.
0x00007fffef71f18c in pselect () from /usr/lib/libc.so.6
(gdb) bt full
#0  0x00007fffef71f18c in pselect () at /usr/lib/libc.so.6
#1  0x000000000069fd6b in xg_select (fds_lim=8, rfds=0x7fffffffdcd0, 
wfds=0x7fffffffdc50, efds=0x0, timeout=0x7fffffffdc30, sigmask=0x0) at 
xgselect.c:116
        all_rfds = {fds_bits = {192, 0 <repeats 15 times>}}
        all_wfds = {fds_bits = {0 <repeats 16 times>}}
        tmo = {tv_sec = 0, tv_nsec = 140737488345200}
        tmop = 0x7fffffffdc30
        context = 0x2d825d0
        have_wfds = true
        gfds_buf = 
            {{fd = 7, events = 1, revents = 0}, {fd = 6560509, events = 0, 
revents = 0}, {fd = -10080, events = 32767, revents = 0}, {fd = 1, events = 0, 
revents = 0}, {fd = 1030, events = 0, revents = 0}, {fd = 42, events = 0, 
revents = 0}, {fd = 11055605, events = 0, revents = 0}, {fd = 11055572, events 
= 0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 88, events = 0, 
revents = 0}, {fd = 12167591, events = 0, revents = 0}, {fd = 11055572, events 
= 0, revents = 0}, {fd = 12167420, events = 0, revents = 0}, {fd = 0, events = 
0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 0, events = 10, 
revents = 0}, {fd = 12772560, events = 0, revents = 0}, {fd = -11112, events = 
32767, revents = 0}, {fd = 5573343, events = 0, revents = 0}, {fd = 0, events = 
0, revents = 0}, {fd = 12772565, events = 0, revents = 0}, {fd = 1, events = 0, 
revents = 0}, {fd = 12772560, events = 0, revents = 0}, {fd = 21486901, events 
= 0, revents = 0}, {fd = -11064, events = 32767, revents = 0}, {fd = 5570466, 
events = 0, revents = 0}, {fd = 21486901, events = 0, revents = 0}, {fd = 
-11040, events = 32767, revents = 0}, {fd = 5570466, events = 0, revents = 0}, 
{fd = 9, events = 0, revents = 0}, {fd = 5572836, events = 0, revents = 0}, {fd 
= 2, events = 0, revents = 0}, {fd = 13300048, events = 0, revents = 0}, {fd = 
6281605, events = 0, revents = 0}, {fd = 45984, events = 0, revents = 0}, {fd = 
-136433516, events = 32767, revents = 0}, {fd = 5568885, events = 0, revents = 
0}, {fd = 305, events = 0, revents = 0}, {fd = -134537216, events = 32767, 
revents = 0}, {fd = -268357864, events = 32767, revents = 0}, {fd = -268349704, 
events = 32767, revents = 0}, {fd = -136431405, events = 32767, revents = 0}, 
{fd = 305, events = 0, revents = 0}, {fd = -268349704, events = 32767, revents 
= 0}, {fd = -134537216, events = 32767, revents = 0}, {fd = -10792, events = 
32767, revents = 0}, {fd = -10796, events = 32767, revents = 0}, {fd = 
-136433077, events = 32767, revents = 0}, {fd = 4242610, events = 0, revents = 
0}, {fd = 4199752, events = 0, revents = 0}, {fd = -10792, events = 32767, 
revents = 0}, {fd = 2111285930, events = 0, revents = 0}, {fd = 26, events = 0, 
revents = 0}, {fd = -268349704, events = 32767, revents = 0}, {fd = -10576, 
events = 32767, revents = 0}, {fd = -268357864, events = 32767, revents = 0}, 
{fd = -10796, events = 32767, revents = 0}, {fd = -10592, events = 32767, 
revents = 0}, {fd = -135176416, events = 32767, revents = 0}, {fd = 106, events 
= 0, revents = 0}, {fd = 47427648, events = 0, revents = 0}, {fd = 0, events = 
0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 0, events = 0, 
revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = -134224792, events = 
32767, revents = 0}, {fd = -10432, events = 32767, revents = 0}, {fd = 
-135175304, events = 32767, revents = 0}, {fd = 5, events = 0, revents = 0}, 
{fd = 0, events = 0, revents = 0}, {fd = -10392, events = 32767, revents = 0}, 
{fd = -136430111, events = 32767, revents = 0}, {fd = 49, events = 0, revents = 
0}, {fd = 22169539, events = 0, revents = 0}, {fd = 21486901, events = 0, 
revents = 0}, {fd = 9562752, events = 0, revents = 0}, {fd = 1, events = 0, 
revents = 0}, {fd = 13251680, events = 0, revents = 0}, {fd = -10528, events = 
32767, revents = 0}, {fd = 6138465, events = 0, revents = 0}, {fd = 13743104, 
events = 0, revents = 0}, {fd = 13251680, events = 0, revents = 0}, {fd = 
-10576, events = 32767, revents = 0}, {fd = 1, events = 0, revents = 0}, {fd = 
1, events = 0, revents = 0}, {fd = 1, events = 0, revents = 0}, {fd = 1, events 
= 0, revents = 0}, {fd = 257, events = 0, revents = 0}, {fd = -11304, events = 
32767, revents = 0}, {fd = 0, events = 6, revents = 0}, {fd = 0, events = 0, 
revents = 0}, {fd = 11, events = 0, revents = 0}, {fd = 13251680, events = 0, 
revents = 0}, {fd = -10528, events = 32767, revents = 0}, {fd = 28272, events = 
0, revents = 0}, {fd = 4294032, events = 0, revents = 0}, {fd = -10400, events 
= 32767, revents = 0}, {fd = 6141648, events = 0, revents = 0}, {fd = 0, events 
= 0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 0, events = 0, 
revents = 0}, {fd = 28272, events = 0, revents = 0}, {fd = 1, events = 135, 
revents = 0}, {fd = 1, events = 0, revents = 0}, {fd = 13251680, events = 0, 
revents = 0}, {fd = 13743104, events = 0, revents = 0}, {fd = 13254064, events 
= 0, revents = 0}, {fd = -11392, events = 32767, revents = 0}, {fd = 0, events 
= 0, revents = 0}, {fd = 13282336, events = 0, revents = 0}, {fd = 5568885, 
events = 0, revents = 0}, {fd = 28272, events = 0, revents = 0}, {fd = -10352, 
events = 32767, revents = 0}, {fd = 6140345, events = 0, revents = 0}, {fd = 
13251680, events = 0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 
5573208, events = 0, revents = 0}, {fd = 0, events = 0, revents = 0}, {fd = 
-10256, events = 32767, revents = 0}, {fd = 6144162, events = 0, revents = 0}, 
{fd = 0, events = 0, revents = 0}, {fd = 28272, events = 0, revents = 0},
{fd = 5, events = 0, revents = 0}, {fd = 6, events = 0, revents = 0}, {fd = 
13251680, events = 0, revents = 0}, {fd = -10248, events = 32767, revents = 0}, 
{fd = 5573343, events = 0, revents = 0}, {fd = 13282336, events = 0, revents = 
0}}
        gfds = 0x7fffffffd3e0
        gfds_size = 128
        n_gfds = 1
        retval = 0
        our_fds = 0
        max_fds = 7
        context_acquired = true
        i = 1
        nfds = 0
        tmo_in_millisec = -1
        must_free = 0
        need_to_dispatch = 35
#2  0x0000000000676dad in really_call_select (arg=0x7fffffffda20) at 
thread.c:498
        sa = 0x7fffffffda20
        self = 0xcc69e0 <primary_thread>
#3  0x00000000005d4a02 in flush_stack_call_func (func=0x676d51 
<really_call_select>, arg=0x7fffffffda20) at alloc.c:5137
        end = 0x7fffffffd9a0
        self = 0xcc69e0 <primary_thread>
#4  0x0000000000676e2b in thread_select (func=0x69f84f <xg_select>, max_fds=7, 
rfds=0x7fffffffdcd0, wfds=0x7fffffffdc50, efds=0x0, timeout=0x7fffffffdc30, 
sigmask=0x0)
    at thread.c:517
        sa = 
          {func = 0x69f84f <xg_select>, max_fds = 7, rfds = 0x7fffffffdcd0, 
wfds = 0x7fffffffdc50, efds = 0x0, timeout = 0x7fffffffdc30, sigmask = 0x0, 
result = -1}
#5  0x0000000000651168 in wait_reading_process_output (time_limit=30, nsecs=0, 
read_kbd=-1, do_display=true, wait_for_cell=0, wait_proc=0x0, just_wait_proc=0)
    at process.c:5345
        process_skipped = false
        channel = 1024
        nfds = 0
        Available = {fds_bits = {64, 0 <repeats 15 times>}}
        Writeok = {fds_bits = {0 <repeats 16 times>}}
        check_write = true
        check_delay = 0
        no_avail = false
        xerrno = 4
        proc = 47321728
        timeout = {tv_sec = 9, tv_nsec = 484656783}
        end_time = {tv_sec = 1481596880, tv_nsec = 100278958}
        timer_delay = {tv_sec = 9, tv_nsec = 484656783}
        got_output_end_time = {tv_sec = 1481596880, tv_nsec = 100278958}
        wait = TIMEOUT
        got_some_output = -1
        retry_for_async = false
        count = 3
        now = {tv_sec = 0, tv_nsec = -1}
#6  0x00000000004252be in sit_for (timeout=122, reading=true, display_option=1)
    at dispnew.c:5763
        sec = 30
        nsec = 0
        do_display = true
#7  0x000000000055bc48 in read_char (commandflag=1, map=18488707, prev_event=0, 
used_mouse_menu=0x7fffffffe24f, end_time=0x0) at keyboard.c:2722
        tem0 = 5568885
        timeout = 30
        delay_level = 4
        buffer_size = 1
        c = 0
        jmpcount = 3
        local_getcjmp = 
                {{__jmpbuf = {0, -1720637353449548036, 4294032, 
140737488349360, 0, 0, -1720637351413213444, 1720636901125723900}, 
__mask_was_saved = 0, __saved_mask = {__val = {20304512, 13254064, 6140185, 0, 
140737488347280, 5568885, 18152640, 13254064, 5703904, 0, 140737488347328, 
5568885, 19983315, 140737488347424, 6272424, 0}}}}
        save_jump = 
                {{__jmpbuf = {0, 0, 0, 0, 0, 0, 0, 0}, __mask_was_saved = 0, 
__saved_mask = {__val = {0 <repeats 16 times>}}}}
        tem = 18488707
        save = 0
        previous_echo_area_message = 0
        also_record = 0
        reread = false
        recorded = false
        polling_stopped_here = false
        orig_kboard = 0x2d23870
#8  0x0000000000568714 in read_key_sequence (keybuf=0x7fffffffe400, bufsize=30, 
prompt=0, dont_downcase_last=false, can_return_switch_frame=true, 
fix_current_buffer=true, prevent_redisplay=false) at keyboard.c:9136
        interrupted_kboard = 0x2d23870
        interrupted_frame = 0xd28688 <bss_sbrk_buffer+400168>
        key = 4545089
        used_mouse_menu = false
        echo_local_start = 0
        last_real_key_start = 0
        keys_local_start = 0
        new_binding = 5
        count = 3
        t = 0
        echo_start = 0
        keys_start = 0
        current_binding = 18488707
        first_event = 0
        first_unbound = 31
        mock_input = 0
        fkey = {parent = 14043411, map = 14043411, start = 0, end = 0}
        keytran = {parent = 13732419, map = 13732419, start = 0, end = 0}
        indec = {parent = 14043443, map = 14043443, start = 0, end = 0}
        shift_translated = false
        delayed_switch_frame = 0
        original_uppercase = 0
        original_uppercase_position = -1
        dummyflag = false
        starting_buffer = 0xd1b400 <bss_sbrk_buffer+346272>
        fake_prefixed_keys = 0
#9  0x0000000000558939 in command_loop_1 () at keyboard.c:1373
        cmd = 140737488348496
        keybuf = 
          {0, 29328, 8321642624, 0, 13251856, 29328, 288, 13283392, 13251856, 
0, 140737488348320, 6271814, 4294967296, 140737488348352, 13254064, 0, 0, 
140737488348320, 5568885, 0, 140737488348416, 6272424, 14045523, 3, 13254064, 
29328, 0, 140737488348400, 5568885, 0}
        i = 0
        prev_modiff = 0
        prev_buffer = 0x0
        already_adjusted = false
#10 0x00000000005f64a5 in internal_condition_case (bfun=0x558528 
<command_loop_1>, handlers=19680, hfun=0x557d15 <cmd_error>) at eval.c:1336
        val = 5568885
        c = 0x2d3af10
#11 0x0000000000558232 in command_loop_2 (ignore=0) at keyboard.c:1115
        val = 0
#12 0x00000000005f5d72 in internal_catch (tag=47472, func=0x558209 
<command_loop_2>, arg=0) at eval.c:1101
        val = 5568885
        c = 0x2d23940
#13 0x00000000005581d4 in command_loop () at keyboard.c:1094
#14 0x00000000005578f0 in recursive_edit_1 () at keyboard.c:700
        count = 1
        val = 140737488348800
#15 0x0000000000557a6c in Frecursive_edit () at keyboard.c:771
        count = 0
        buffer = 0
#16 0x0000000000555867 in main (argc=3, argv=0x7fffffffe8b8) at emacs.c:1686
        stack_bottom_variable = 0 '\000'
        do_initial_setlocale = true
        dumping = false
        skip_args = 1
        no_loadup = false
        junk = 0x0
        dname_arg = 0x0
        ch_to_dir = 0x0
        original_pwd = 0x0
        disable_aslr = false
        rlim = {rlim_cur = 8720384, rlim_max = 18446744073709551615}
        sockfd = -1

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