GNU bug report logs - #71177
30.0.50; crash when opening and closing many TTY frames in succession

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Daniel Clemente <n142857 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; crash when opening and closing many TTY frames in succession
Date: Fri, 24 May 2024 17:47:27 +0000

[Message part 1 (text/plain, inline)]

Emacs compiled without X.
I can launch a new emacsclient with a keypress and I can kill it with
another keypress.
I held down the key to launch many emacsclient (around 20), then killed
them, then launched a few more, killed them, … Less than 10 seconds of this
behaviour are enough to crash the server.
This doesn't happen during normal usage. I was intentionally trying to find
the bug. I don't expect  the daemon to crash only by opening/closing frames.
The command I run to launch the emacsclient is:  emacsclient -c -e "(progn
(dired "~"))"
I use rxvt-unicode.



Program received signal SIGPIPE, Broken pipe.
0x00007ffff5517240 in __GI___libc_write (fd=fd <at> entry=63,
buf=buf <at> entry=0x555563676b10,
nbytes=nbytes <at> entry=17) at ../sysdeps/unix/sysv/linux/write.c:26
26 ../sysdeps/unix/sysv/linux/write.c: No such file or directory.
(gdb) bt full
#0  0x00007ffff5517240 in __GI___libc_write (fd=fd <at> entry=63,
buf=buf <at> entry=0x555563676b10,
nbytes=nbytes <at> entry=17) at ../sysdeps/unix/sysv/linux/write.c:26
        sc_ret = -32
        __arg3 = <optimized out>
        _a2 = <optimized out>
        sc_ret = <optimized out>
        sc_ret = <optimized out>
        __arg1 = <optimized out>
        _a3 = <optimized out>
        sc_cancel_oldtype = <optimized out>
        resultvar = <optimized out>
        __arg2 = <optimized out>
        _a1 = <optimized out>
#1  0x00005555556715b7 in emacs_full_write (interruptible=-1, nbyte=17,
buf=0x555563676b10 "-emacs-pid 26724\n", fd=63, fd <at> entry=17) at
sysdep.c:2812
        n = <optimized out>
        bytes_written = 0
        bytes_written = <optimized out>
        n = <optimized out>
#2  emacs_write_sig (fd=fd <at> entry=63, buf=<optimized out>, nbyte=<optimized
out>) at sysdep.c:2852
No locals.
#3  0x0000555555760d40 in send_process (proc=proc <at> entry=XIL(0x555563ae0f85),
buf=<optimized out>, len=<optimized out>, object=<optimized out>,
object <at> entry=XIL(0x555561809f34)) at process.c:6703
        written = 0
        outfd = 63
        cur_len = 17
        cur_buf = 0x555563676b10 "-emacs-pid 26724\n"
        cur_object = XIL(0x555561809f34)
        p = 0x555563ae0f80
        rv = <optimized out>
        coding = <optimized out>
#4  0x0000555555761298 in Fprocess_send_string (process=<optimized out>,
string=XIL(0x555561809f34)) at /w/emacs/src/lisp.h:1688
        proc = XIL(0x555563ae0f85)
#5  0x00007fffed3f1113 in
F7365727665722d73656e642d737472696e67_server_send_string_0 () from
/home/dc/.emacs.d/eln-cache/30.0.50-e7264eac/server-0cc44189-48d76bed.eln
No symbol table info available.
#6  0x00005555556f15dc in Ffuncall (nargs=3, args=0x7fffffffbc80) at
eval.c:3073
        count = <optimized out>
        val = <optimized out>
#7  0x00007fffed3f50e0 in
F7365727665722d70726f636573732d66696c746572_server_process_filter_0 () from
/home/dc/.emacs.d/eln-cache/30.0.50-e7264eac/server-0cc44189-48d76bed.eln
No symbol table info available.
#8  0x00005555556f15dc in Ffuncall (nargs=nargs <at> entry=3,
args=0x7fffffffbdf0) at eval.c:3073
        count = <optimized out>
        val = <optimized out>
#9  0x00005555556f1a30 in Fapply (nargs=nargs <at> entry=2,
args=args <at> entry=0x7fffffffbea0)
at eval.c:2745
        i = <optimized out>
        funcall_nargs = 3
        funcall_args = <optimized out>
        spread_arg = <optimized out>
        fun = <optimized out>
        sa_avail = <optimized out>
        sa_count = {
          bytes = 256
        }
        numargs = <optimized out>
        retval = <optimized out>
#10 0x00005555556f1d60 in apply1 (fn=<optimized out>, arg=<optimized out>)
at eval.c:2961
No locals.
#11 0x00005555556ef5fc in internal_condition_case_1
(bfun=bfun <at> entry=0x555555751af0
<read_process_output_call>, arg=XIL(0x55555f5aea03),
handlers=handlers <at> entry=XIL(0x90),

    hfun=hfun <at> entry=0x555555751a30 <read_process_output_error_handler>) at
eval.c:1617
        val = <optimized out>
        c = 0x555555e4eec0
#12 0x0000555555754745 in read_and_dispose_of_process_output
(coding=<optimized out>, nbytes=3565,
--Type <RET> for more, q to quit, c to continue without paging--
    chars=0x7fffffffbef0 "-env MAIL=/var/mail/dc -env LANGUAGE=en_US:en
-env GTK_CSD=0 -env WORKON_HOME=/home/dc/.virtualenvs -env USER=dc -env
XDG_SEAT=seat0 -env VAGRANT_DISABLE_VBOXSYMLINKCREATE=1 -env
SSH_AGENT_PID=1016 -e"...,
    p=0x555563ae0f80) at process.c:6354
        outstream = XIL(0x26ed830)
        text = <optimized out>
        outer_running_asynch_code = false
        waiting = -1
        outstream = <optimized out>
        text = <optimized out>
        outer_running_asynch_code = <optimized out>
        waiting = <optimized out>
        tem = <optimized out>
#13 read_process_output (proc=proc <at> entry=XIL(0x555563ae0f85),
channel=channel <at> entry=63) at process.c:6264
        nbytes = 3565
        p = 0x555563ae0f80
        coding = <optimized out>
        carryover = <optimized out>
        readmax = <optimized out>
        count = <optimized out>
        odeactivate = XIL(0)
        chars = <optimized out>
        sa_avail = <optimized out>
        sa_count = <optimized out>
#14 0x000055555575d0a4 in wait_reading_process_output
(time_limit=time_limit <at> entry=0, nsecs=nsecs <at> entry=0,
read_kbd=read_kbd <at> entry=-1,
do_display=<optimized out>, wait_for_cell=wait_for_cell <at> entry=XIL(0),
wait_proc=wait_proc <at> entry=0x0,
    just_wait_proc=<optimized out>) at process.c:5948
        nread = <optimized out>
        process_skipped = <optimized out>
        wrapped = <optimized out>
        channel_start = <optimized out>
        child_fd = <optimized out>
        channel = <optimized out>
        nfds = <optimized out>
        Available = {
          fds_bits = {-9223372036854775792, 0 <repeats 15 times>}
        }
        Writeok = {
          fds_bits = {0 <repeats 16 times>}
        }
        check_write = <optimized out>
        check_delay = <optimized out>
        no_avail = <optimized out>
        xerrno = 5
        proc = XIL(0x555563ae0f85)
        timeout = {
          tv_sec = 0,
          tv_nsec = 0
        }
        end_time = <optimized out>
        timer_delay = <optimized out>
        got_output_end_time = <optimized out>
        wait = <optimized out>
        got_some_output = <optimized out>
        prev_wait_proc_nbytes_read = <optimized out>
        retry_for_async = <optimized out>
        count = <optimized out>
        now = <optimized out>
        last_read_channel = 61
        MINIMUM = MINIMUM
        TIMEOUT = TIMEOUT
        FOREVER = FOREVER
--Type <RET> for more, q to quit, c to continue without paging--
#15 0x0000555555653ae7 in kbd_buffer_get_event (kbp=kbp <at> entry=0x7fffffffd480,
end_time=end_time <at> entry=0x0, used_mouse_menu=<optimized out>) at
keyboard.c:4078
        do_display = <optimized out>
        obj = <optimized out>
        str = <optimized out>
#16 0x0000555555659f2d in read_event_from_main_queue
(used_mouse_menu=<optimized out>, local_getcjmp=0x7fffffffd5d0,
end_time=0x0) at keyboard.c:2330
        c = XIL(0)
        count = <optimized out>
        save_jump = {{
            __jmpbuf = {0, 0, 0, 0, 0, 0, 0, 0},
            __mask_was_saved = 0,
            __saved_mask = {
              __val = {0 <repeats 16 times>}
            }
          }}
        kb = 0x5555597bd2a0
        c = <optimized out>
        save_jump = <optimized out>
        kb = <optimized out>
        start = <optimized out>
        count = <optimized out>
        last = <optimized out>
#17 read_decoded_event_from_main_queue (used_mouse_menu=<optimized out>,
prev_event=<optimized out>, local_getcjmp=<optimized out>,
end_time=<optimized out>) at keyboard.c:2394
        nextevt = <optimized out>
        frame = <optimized out>
        terminal = <optimized out>
        events = {XIL(0), XIL(0), XIL(0), XIL(0), XIL(0), XIL(0), XIL(0),
XIL(0), XIL(0x300000000), XIL(0x555558cf6b43), XIL(0), XIL(0x6c90),
make_fixnum(2104), XIL(0x8f01), XIL(0x7fffffffd658), XIL(0x838)}
        n = <optimized out>
        events = <optimized out>
        n = <optimized out>
        nextevt = <optimized out>
        frame = <optimized out>
        terminal = <optimized out>
        meta_key = <optimized out>
        coding = <optimized out>
        i = <optimized out>
        c = <optimized out>
        modifier = <optimized out>
        src = <optimized out>
        dest = <optimized out>
        i = <optimized out>
        p = <optimized out>
        c = <optimized out>
        modifier = <optimized out>
#18 read_char (commandflag=commandflag <at> entry=1,
map=map <at> entry=XIL(0x55555fd11173),
prev_event=XIL(0), used_mouse_menu=used_mouse_menu <at> entry=0x7fffffffd93b,
end_time=end_time <at> entry=0x0) at keyboard.c:3015
        c = <optimized out>
        local_getcjmp = {{
            __jmpbuf = {93825075899393, 8307592983963047000,
140737488345696, 140737488345696, 93825061868192, 93825164817153,
2746962207876387928, 8307591716148024408},
            __mask_was_saved = 0,
            __saved_mask = {
              __val = {36720, 2104, 36720, 140737488344800, 93825164763245,
0, 93824994463455, 0, 4294975714, 93825167859555, 93825164817157, 2104,
36720, 140737488344800, 93825164763245, 0}
            }
          }}
        save_jump = {{
            __jmpbuf = {0, 0, 0, 0, 0, 0, 0, 0},
            __mask_was_saved = 0,
            __saved_mask = {
              __val = {0 <repeats 16 times>}
            }
          }}
--Type <RET> for more, q to quit, c to continue without paging--
        tem = <optimized out>
        save = <optimized out>
        previous_echo_area_message = XIL(0)
        also_record = XIL(0)
        reread = false
        recorded = false
        polling_stopped_here = true
        orig_kboard = 0x5555597bd2a0
        retry = <optimized out>
        jmpcount = <optimized out>
#19 0x000055555565d4bd in read_key_sequence
(keybuf=keybuf <at> entry=0x7fffffffda60,
prevent_redisplay=prevent_redisplay <at> entry=false,
disable_text_conversion_p=false, fix_current_buffer=true,
can_return_switch_frame=true,
    dont_downcase_last=false, prompt=XIL(0)) at keyboard.c:10723
        interrupted_kboard = <optimized out>
        interrupted_frame = 0x55555a51ec70
        key = <optimized out>
        used_mouse_menu = false
        echo_local_start = 0
        last_real_key_start = 0
        keys_local_start = 0
        new_binding = <optimized out>
        count = <optimized out>
        t = 0
        echo_start = 0
        keys_start = 0
        current_binding = XIL(0x55555fd11173)
        first_unbound = 31
        mock_input = 0
        used_mouse_menu_history = {false <repeats 30 times>}
        fkey = {
          parent = XIL(0x55555fd4a023),
          map = XIL(0x55555fd4a023),
          start = 0,
          end = 0
        }
        keytran = {
          parent = XIL(0x7ffff211c9fb),
          map = XIL(0x7ffff211c9fb),
          start = 0,
          end = 0
        }
        indec = {
          parent = XIL(0x55555fd4a033),
          map = XIL(0x55555fd4a033),
          start = 0,
          end = 0
        }
        shift_translated = false
        delayed_switch_frame = XIL(0)
        original_uppercase = XIL(0)
        original_uppercase_position = -1
        starting_buffer = <optimized out>
        fake_prefixed_keys = XIL(0)
        first_event = XIL(0)
        second_event = <optimized out>
        replay_key = <optimized out>
#20 0x000055555565f8be in command_loop_1 () at keyboard.c:1429
        cmd = <optimized out>
        keybuf = {XIL(0x4ee1d0), make_fixnum(91), make_fixnum(50),
make_fixnum(53), make_fixnum(126), make_fixnum(49), make_fixnum(126),
XIL(0x7fffffffdb30), XIL(0x9), XIL(0xd8f0), XIL(0x30), XIL(0x555560400db5),
XIL(0x1),
          XIL(0x7fffffffdb30), XIL(0x60), XIL(0x55555564b9a0), XIL(0x1),
XIL(0x7fffffffdcbc), make_fixnum(0), XIL(0x55555564bb65), XIL(0), XIL(0),
XIL(0x2aaa9bb85280), XIL(0x555561507ac3), XIL(0x7ffff18388d4), XIL(0),
XIL(0x8700),
--Type <RET> for more, q to quit, c to continue without paging--
          make_fixnum(23456248479721), XIL(0x9), XIL(0x8760)}
        i = <optimized out>
        last_pt = <optimized out>
        prev_modiff = 16
        prev_buffer = 0x55555f9eb300
#21 0x00005555556ef577 in internal_condition_case
(bfun=bfun <at> entry=0x55555565f720
<command_loop_1>, handlers=handlers <at> entry=XIL(0x90),
hfun=hfun <at> entry=0x55555564b9a0
<cmd_error>) at eval.c:1593
        val = <optimized out>
        c = 0x555555ec9bd0
#22 0x0000555555649fb6 in command_loop_2 (handlers=handlers <at> entry=XIL(0x90))
at keyboard.c:1168
        val = <optimized out>
#23 0x00005555556ef4cc in internal_catch (tag=tag <at> entry=XIL(0xe730),
func=func <at> entry=0x555555649f90 <command_loop_2>, arg=arg <at> entry=XIL(0x90))
at eval.c:1272
        val = <optimized out>
        c = 0x555555edcc70
#24 0x0000555555649f51 in command_loop () at keyboard.c:1146
No locals.
#25 0x00005555556507be in recursive_edit_1 () at keyboard.c:754
        count = <optimized out>
        val = <optimized out>
#26 0x0000555555650b30 in Frecursive_edit () at keyboard.c:837
        count = <optimized out>
        buffer = <optimized out>
#27 0x000055555558efc6 in main (argc=<optimized out>, argv=0x7fffffffded8)
at emacs.c:2621
        stack_bottom_variable = 0x2
        old_argc = <optimized out>
        dump_file = 0x0
        no_loadup = false
        junk = 0x0
        dname_arg = 0x0
        ch_to_dir = 0x0
        original_pwd = <optimized out>
        dump_mode = <optimized out>
        skip_args = 1
        temacs = 0x0
        attempt_load_pdump = <optimized out>
        only_version = <optimized out>
        rlim = {
          rlim_cur = 10022912,
          rlim_max = 18446744073709551615
        }
        lc_all = <optimized out>
        sockfd = -1
(gdb)
(gdb) xbacktrace
"server-send-string" (0xffffbc88)
"server-process-filter" (0xffffbdf8)




In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu) of 2024-05-08 built on
sonn
Repository revision: b82a003544c607b5c54bab13870d52b53e70aeb8
Repository branch: master
System Description: Devuan GNU/Linux 5 (daedalus)

Configured using:
 'configure --prefix=/opt/dc/emacs/ --without-dbus --with-tiff=no
--without-tiff
 --without-libsystemd --without-dbus --with-mailutils
--with-native-compilation --without-modules
 --with-x-toolkit=no --without-imagemagick --without-xft --without-harfbuzz
--without-freetype
 --without-libotf --without-xwidgets --without-xpm --without-jpeg
--without-gif --without-png
 --without-webp --without-rsvg --without-cairo --without-x 'CFLAGS=-g3 -O3''

Configured features:
GMP GNUTLS LCMS2 LIBSELINUX LIBXML2 NATIVE_COMP NOTIFY INOTIFY PDUMPER
SECCOMP SOUND SQLITE3 THREADS
XIM ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=SCIM
  locale-coding-system: utf-8-unix

Major mode: Dired by name

Minor modes in effect:
  xterm-mouse-mode: t
  erc-track-mode: t
  erc-services-mode: t
  erc-ring-mode: t
  erc-netsplit-mode: t
  erc-menu-mode: t
  erc-match-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-readonly-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-autojoin-mode: t
  erc-networks-mode: t
  gnus-dired-mode: t
  savehist-mode: t
  recentf-mode: t
  hexl-follow-ascii: t
  helm-mode: t
  helm-minibuffer-history-mode: t
  async-bytecomp-package-mode: t
  global-git-commit-mode: t
  server-mode: t
  jdecomp-mode: t
  projectile-mode: t
  global-semantic-decoration-mode: t
  global-semanticdb-minor-mode: t
  global-semantic-show-unmatched-syntax-mode: -1
  semantic-mode: t
  rcirc-track-minor-mode: t
  jabber-activity-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  unpackaged/org-export-html-with-useful-ids-mode: t
  minibuffer-depth-indicate-mode: t
  global-so-long-mode: t
  display-time-mode: t
  global-hl-line-mode: t
  xclip-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  minibuffer-regexp-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
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Features:
(shadow elmo-multi modb-standard elmo-maildir emacsbug winner tramp-archive
tramp-gvfs dired-aux
xterm-keybinder xt-mouse term/rxvt term/xterm xterm hideshow ox-texinfo
erc-track erc-services
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erc-button erc-fill erc-stamp
erc-join erc erc-backend erc-networks erc-common erc-compat erc-loaddefs
quail rot13 git-link
nukneval bustrofedon dired-filetype-face dired-tar gnus-dired dired-x
mime-w3m w3m-lnum w3m w3m-hist
bookmark-w3m w3m-ems w3m-favicon w3m-image w3m-fb tab-line w3m-proc
w3m-util savehist tramp-cache
time-stamp tramp-sh recentf tree-widget em-term term ehelp esh-ext esh-opt
esh-io esh-arg esh-module
esh-groups esh-util zone-select zone org-location-google-maps google-maps
google-maps-static
google-maps-geocode google-maps-base beancount binview calc calc-loaddefs
calc-macs hexl
taskjuggler-mode generic generic-x boxquote rect rainbow-delimiters
rainbow-mode htmlize-hack
htmlize log4j-mode oddmuse skeleton doc-view jka-compr fc flashcard-sm5
flashcard keywiz gamegrid
tt-mode helm-mode helm-misc helm-for-files helm-bookmark helm-adaptive
magit-bookmark bookmark
fringe helm-external helm-sys helm-net helm-man helm-color helm-elisp
helm-files image-dired
image-dired-tags image-dired-external image-dired-util image-mode exif
tramp trampver
tramp-integration files-x tramp-message tramp-compat tramp-loaddefs
helm-buffers helm-occur
helm-tags helm-locate helm-grep helm-regexp helm-info helm-utils helm-types
helm-eval edebug
helm-help helm helm-global-bindings helm-easymenu helm-core async-bytecomp
helm-source
helm-multi-match helm-lib async helm-config helm-autoloads diary-lib
diary-loaddefs magit-submodule
magit-obsolete magit-blame magit-stash magit-reflog magit-bisect magit-push
magit-pull magit-fetch
magit-clone magit-remote magit-commit magit-sequence magit-notes
magit-worktree magit-tag
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magit magit-repos
magit-apply magit-wip magit-log which-func imenu magit-diff smerge-mode
diff diff-mode track-changes
git-commit log-edit pcvs-util add-log magit-core magit-autorevert
autorevert filenotify magit-margin
magit-transient magit-process with-editor server magit-mode transient
magit-git magit-base
magit-section dash chuck-mode minizinc-mode jdecomp arc-mode archive-mode
cus-edit cus-load
projectile lisp-mnt ibuf-ext semantic/dep srecode/mode semantic/senator
semantic/wisent
semantic/wisent/wisent srecode/insert srecode/filters srecode/args
ede/speedbar ede/files ede
ede/detect ede/base ede/auto ede/source eieio-speedbar speedbar dframe
eieio-custom srecode/find
srecode/map srecode/ctxt srecode/compile srecode/dictionary srecode/fields
srecode/table
semantic/decorate/mode semantic/decorate pulse srecode semantic/db-mode
semantic/idle
semantic/analyze semantic/sort semantic/scope semantic/analyze/fcn
semantic/db eieio-base
semantic/format ezimage semantic/tag-ls semantic/find semantic/ctxt
semantic/util-modes
semantic/util semantic semantic/tag semantic/lex semantic/fw mode-local
cedet rcirc offlineimap
sasl-xoauth2 oauth2 url-http url-auth url-gw nsm plstore crm wl-template
wl-fldmgr wl-score wl-demo
wl-thread wl-action wl wl-draft wl-folder elmo-nntp elmo-net elmo-cache
elmo-map elmo-dop ps-print
ps-print-loaddefs lpr elmo-filter wl-summary wl-refile wl-message wl-mime
mime-play filename
mime-edit mime-setup mail-mime-setup semi-setup smtp wl-e21 wl-highlight
invisible inv-23 elmo-mime
mmelmo-buffer mmelmo-imap mmimap mmbuffer mime-view mime-conf calist
semi-def wl-address pldap
wl-util wl-vars wl-version modb-generic elmo-flag elmo-localdir elmo
elmo-signal elmo-msgdb modb
modb-entity elmo-date eword-encode mime-parse mime mmgeneric elmo-util
eword-decode mel mime-def
alist pces pces-e20 pces-20 mcs-e20 mcs-20 mcharset timezone elmo-vars
path-util elmo-version luna
std11 pccl pccl-20 ccl broken static apel-ver product jabber
jabber-truncate jabber-time
jabber-autoaway jabber-vcard-avatars jabber-chatstates jabber-events
jabber-vcard jabber-avatar
jabber-activity jabber-watch jabber-modeline jabber-ahc-presence jabber-ahc
jabber-version
jabber-ourversion jabber-muc-nick-completion hippie-exp jabber-browse
jabber-search jabber-register
jabber-roster jabber-presence jabber-muc jabber-bookmarks jabber-private
jabber-muc-nick-coloring
jabber-widget jabber-disco jabber-chat jabber-history jabber-chatbuffer
jabber-alert jabber-iq
jabber-core jabber-console sgml-mode facemenu jabber-keymap jabber-sasl
sasl sasl-anonymous
sasl-login sasl-plain fsm jabber-logon jabber-conn srv dns starttls tls
jabber-xml jabber-menu
jabber-util goto-addr hexrgb markdown-mode color thingatpt yasnippet
org-contacts gnus-art mm-uu
mml2015 mm-view mml-smime smime gnutls dig gnus-sum shr pixel-fill kinsoku
url-file svg dom
gnus-group gnus-undo gnus-start gnus-dbus dbus xml gnus-cloud nnimap nnmail
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[Message part 2 (text/html, inline)]

Message #8 received at 71177 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Daniel Clemente <n142857 <at> gmail.com>
Cc: 71177 <at> debbugs.gnu.org
Subject: Re: bug#71177: 30.0.50;
 crash when opening and closing many TTY frames in succession
Date: Fri, 24 May 2024 22:31:49 +0300

> From: Daniel Clemente <n142857 <at> gmail.com>
> Date: Fri, 24 May 2024 17:47:27 +0000
> 
> Emacs compiled without X.
> I can launch a new emacsclient with a keypress and I can kill it with another keypress.
> I held down the key to launch many emacsclient (around 20), then killed them, then launched a few more,
> killed them, … Less than 10 seconds of this behaviour are enough to crash the server.
> This doesn't happen during normal usage. I was intentionally trying to find the bug. I don't expect  the daemon
> to crash only by opening/closing frames.
> The command I run to launch the emacsclient is:  emacsclient -c -e "(progn (dired "~"))"
> I use rxvt-unicode.
> 
> Program received signal SIGPIPE, Broken pipe.

I think it crashes because of this SIGPIPE.  I hope some Unix expert
will be able to explain why Emacs gets get SIGPIPE in this scenario.
Perhaps because you kill emacsclient too quickly?

It might help if you post the details of how you "launch a new
emacsclient with a keypress and kill it with another keypress".  IOW,
please describe the recipe to reproduce the problem starting from
"emacs -Q -nw --daemon".

Thanks.

Message #11 received at 71177 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 71177 <at> debbugs.gnu.org, Daniel Clemente <n142857 <at> gmail.com>
Subject: Re: bug#71177: 30.0.50; crash when opening and closing many TTY
 frames in succession
Date: Sat, 25 May 2024 08:37:46 +0800

Eli Zaretskii <eliz <at> gnu.org> writes:

> I think it crashes because of this SIGPIPE.  I hope some Unix expert
> will be able to explain why Emacs gets get SIGPIPE in this scenario.
> Perhaps because you kill emacsclient too quickly?

That's a red herring.  It's because Daniel is running Emacs under GDB
that his backtrace ends with a SIGPIPE, while the backtrace for the
crash lies elsewhere.

  (gdb) handle SIGPIPE noprint pass

is probably in order, I suspect.

Message #14 received at 71177 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Clemente <n142857 <at> gmail.com>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 71177 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#71177: 30.0.50; crash when opening and closing many TTY
 frames in succession
Date: Sat, 25 May 2024 11:04:39 +0000

[Message part 1 (text/plain, inline)]

> That's a red herring.  It's because Daniel is running Emacs under GDB
> that his backtrace ends with a SIGPIPE, while the backtrace for the
> crash lies elsewhere.

True, this was a SIGPIPE (still not a crash), and gdb was stopping here. By
running "cont" I could make it continue.
After running "handle SIGPIPE noprint pass", and continuing the same
behaviour for ~30 seconds, I saw the real crash (SIGSEGV).

The cause of the crash is the other bug I reported, bug#71176
(tty-set-up-initial-frame-faces, face_at_buffer_position, default_face =
0x0), so I posted the new backtrace there.

So in here we just discovered that opening+closing frames is a way to
reproduce bug#71176, but I think the bug is 71176 and this one can be
closed.


> It might help if you post the details of how you "launch a new
> emacsclient with a keypress and kill it with another keypress".  IOW,
> please describe the recipe to reproduce the problem starting from
> "emacs -Q -nw --daemon".

I found a simpler formula, by launching and killing emasclient in a bash
loop. Details at bug#71176.



On Sat, 25 May 2024 at 00:37, Po Lu <luangruo <at> yahoo.com> wrote:

> Eli Zaretskii <eliz <at> gnu.org> writes:
>
> > I think it crashes because of this SIGPIPE.  I hope some Unix expert
> > will be able to explain why Emacs gets get SIGPIPE in this scenario.
> > Perhaps because you kill emacsclient too quickly?
>
> That's a red herring.  It's because Daniel is running Emacs under GDB
> that his backtrace ends with a SIGPIPE, while the backtrace for the
> crash lies elsewhere.
>
>   (gdb) handle SIGPIPE noprint pass
>
> is probably in order, I suspect.
>

[Message part 2 (text/html, inline)]

Message #17 received at 71177 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Daniel Clemente <n142857 <at> gmail.com>
Cc: luangruo <at> yahoo.com, 71177 <at> debbugs.gnu.org
Subject: Re: bug#71177: 30.0.50; crash when opening and closing many TTY
 frames in succession
Date: Sat, 25 May 2024 15:43:24 +0300

merge 71177 71176
thanks

> From: Daniel Clemente <n142857 <at> gmail.com>
> Date: Sat, 25 May 2024 11:04:39 +0000
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 71177 <at> debbugs.gnu.org
> 
> > That's a red herring.  It's because Daniel is running Emacs under GDB
> > that his backtrace ends with a SIGPIPE, while the backtrace for the
> > crash lies elsewhere.
> 
> True, this was a SIGPIPE (still not a crash), and gdb was stopping here. By running "cont" I could make it
> continue.
> After running "handle SIGPIPE noprint pass", and continuing the same behaviour for ~30 seconds, I saw the
> real crash (SIGSEGV).
> 
> The cause of the crash is the other bug I reported, bug#71176 (tty-set-up-initial-frame-faces,
> face_at_buffer_position, default_face = 0x0), so I posted the new backtrace there.
> 
> So in here we just discovered that opening+closing frames is a way to reproduce bug#71176, but I think the
> bug is 71176 and this one can be closed.

OK, I'm merging them.

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