I am running emacs 26.3 on ubuntu 20.04, installed via snap from [
scapcraft.io/emacs](https://snapcraft.io/emacs), the `latest/stable 26.3` snap.
$ emacs --version
GNU Emacs 26.3
...
I have distilled my `init.el` file down to the following bare minimum:
(require 'package)
(setq package-archives '(("gnu" . "
https://elpa.gnu.org/packages/")))
(package-initialize)
(package-refresh-contents)
Starting emacs with this `init.el` file results in a crash
Fatal error 11: Segmentation fault
Backtrace:
/snap/emacs/296/usr/bin/emacs[0x58f0c7]
...
Loading the core file in gdb I get the following stack trace:
#0 0x00007f8ce2e65727 in raise () from /snap/core18/current/lib/x86_64-linux-gnu/libpthread.so.0
#1 0x0000000000567d08 in terminate_due_to_signal ()
#2 0x000000000058e802 in handle_fatal_signal ()
#3 0x000000000058e7d3 in deliver_thread_signal ()
#4 0x000000000058e83d in deliver_fatal_thread_signal ()
#5 0x000000000058e9f9 in handle_sigsegv ()
#6 <signal handler called>
#7 0x00007f8ce9cbeac8 in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
#8 0x00007f8ce9cc70bd in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
#9 0x00007f8ce22c92df in _dl_catch_exception () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#10 0x00007f8ce9cc67ca in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
#11 0x00007f8ce22c83ad in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#12 0x00007f8ce22c92df in _dl_catch_exception () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#13 0x00007f8ce22c936f in _dl_catch_error () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#14 0x00007f8ce22c84d9 in __libc_dlopen_mode () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#15 0x00007f8ce22aa886 in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#16 0x00007f8ce22ab088 in __nss_lookup_function () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#17 0x00007f8ce2267cf3 in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#18 0x00007f8ce2269ce4 in getaddrinfo () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
#19 0x0000000000671b31 in Fmake_network_process ()
#20 0x0000000000619809 in funcall_subr ()
#21 0x00000000006194e5 in Ffuncall ()
#22 0x0000000000664a8f in exec_byte_code ()
...
I tried starting it under `strace` to get a better idea of what was failing, and got the following:
readlinkat(AT_FDCWD, "/snap/emacs/296/usr/share/emacs/26.3/lisp/net/starttls.elc", 0x7fff04576570, 1024) = -1 EINVAL (Invalid argument)
read(13, "li\" \"Name of GnuTLS command line"..., 1024) = 1024
read(13, "on-type' to use when starting ST"..., 1024) = 1024
faccessat(AT_FDCWD, "/usr/local/sbin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/usr/local/bin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/usr/sbin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/usr/bin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/sbin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/bin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/snap/bin/starttls", X_OK) = -1 ENOENT (No such file or directory)
faccessat(AT_FDCWD, "/snap/emacs/current/usr/libexec/emacs/26.3/x86_64-pc-linux-gnu/starttls", X_OK) = -1 ENOENT (No such file or directory)
lseek(13, -284, SEEK_CUR) = 2788
read(13, "\n(defalias 'starttls-negotiate-g"..., 1024) = 1024
read(13, "16\16!\\310\\\"\\210\\317\16!!\\203e\0\\320\16"..., 1024) = 1024
lseek(13, 5120, SEEK_SET) = 5120
read(13, "h arg PORT is an integer specify"..., 1024) = 1024
lseek(13, 6144, SEEK_SET) = 6144
read(13, "ke-obsolete \"2011-08-02\" provide"..., 1024) = 46
read(13, "", 1024) = 0
close(13) = 0
lseek(12, 3976, SEEK_CUR) = 5000
read(12, "\n(defalias 'open-network-stream "..., 1024) = 1024
read(12, " connection type %s\" nil make-by"..., 1024) = 1024
lseek(12, 7048, SEEK_SET) = 7048
lseek(12, 7048, SEEK_SET) = 7048
read(12, "nless-encrypted nsm-verify-conne"..., 1024) = 1024
lseek(12, 8072, SEEK_SET) = 8072
read(12, "360\6\7!\\204\\227\1\\361\\362\6\22\6\22#\\210"..., 1024) = 1024
read(12, "able to negotiate a TLS connecti"..., 1024) = 1024
lseek(12, 10120, SEEK_SET) = 10120
lseek(12, 10120, SEEK_SET) = 10120
lseek(12, 10120, SEEK_SET) = 10120
read(12, "4W\0\\306\\211\\211\\311F\\202\\230\0\\30"..., 1024) = 1023
lseek(12, 11143, SEEK_SET) = 11143
read(12, "", 1024) = 0
close(12) = 0
rt_sigprocmask(SIG_BLOCK, [INT ALRM], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 12
connect(12, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(12) = 0
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 12
connect(12, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(12) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=707, ...}) = 0
openat(AT_FDCWD, "/etc/host.conf", O_RDONLY|O_CLOEXEC) = 12
fstat(12, {st_mode=S_IFREG|0644, st_size=92, ...}) = 0
read(12, "# The \"order\" line is only used "..., 4096) = 92
read(12, "", 4096) = 0
close(12) = 0
futex(0x7f1b19be7ba4, FUTEX_WAKE_PRIVATE, 2147483647) = 0
openat(AT_FDCWD, "/etc/resolv.conf", O_RDONLY|O_CLOEXEC) = 12
fstat(12, {st_mode=S_IFREG|0644, st_size=707, ...}) = 0
read(12, "# This file is managed by man:sy"..., 4096) = 707
read(12, "", 4096) = 0
close(12) = 0
uname({sysname="Linux", nodename="steve-work", ...}) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x50} ---
rt_sigaction(SIGSEGV, {sa_handler=SIG_DFL, sa_mask=[SEGV], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f1b19836f20}, {sa_handler=0x58e97b, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER|SA_ONSTACK|SA_SIGINFO, sa_restorer=0x7f1b1a4fb890}, 8) = 0
getpgrp() = 1271053
ioctl(0, TIOCGPGRP, [1271053]) = 0
write(2, "Fatal error 11: ", 16Fatal error 11: ) = 16
write(2, "Segmentation fault", 18Segmentation fault) = 18
here is the full backtrace:
(gdb) bt full
#0 0x00007f2268e0b727 in raise () from /snap/core18/current/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#1 0x0000000000567d08 in terminate_due_to_signal ()
No symbol table info available.
#2 0x000000000058e802 in handle_fatal_signal ()
No symbol table info available.
#3 0x000000000058e7d3 in deliver_thread_signal ()
No symbol table info available.
#4 0x000000000058e83d in deliver_fatal_thread_signal ()
No symbol table info available.
#5 0x000000000058e9f9 in handle_sigsegv ()
No symbol table info available.
#6 <signal handler called>
No symbol table info available.
#7 0x00007f226fc64ac8 in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
No symbol table info available.
#8 0x00007f226fc6d0bd in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
No symbol table info available.
#9 0x00007f226826f2df in _dl_catch_exception () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#10 0x00007f226fc6c7ca in ?? () from /snap/core18/current/lib64/ld-linux-x86-64.so.2
No symbol table info available.
#11 0x00007f226826e3ad in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#12 0x00007f226826f2df in _dl_catch_exception () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#13 0x00007f226826f36f in _dl_catch_error () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#14 0x00007f226826e4d9 in __libc_dlopen_mode () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#15 0x00007f2268250886 in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#16 0x00007f2268251088 in __nss_lookup_function () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#17 0x00007f226820dcf3 in ?? () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#18 0x00007f226820fce4 in getaddrinfo () from /snap/core18/current/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#19 0x0000000000671b31 in Fmake_network_process ()
No symbol table info available.
#20 0x0000000000619809 in funcall_subr ()
No symbol table info available.
#21 0x00000000006194e5 in Ffuncall ()
No symbol table info available.
#22 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#23 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#24 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#25 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#26 0x000000000061a30a in funcall_lambda ()
No symbol table info available.
#27 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#28 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#29 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#30 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#31 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#32 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#33 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#34 0x0000000000664a8f in exec_byte_code ()
--Type <RET> for more, q to quit, c to continue without paging--
No symbol table info available.
#35 0x000000000061a30a in funcall_lambda ()
No symbol table info available.
#36 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#37 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#38 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#39 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#40 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#41 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#42 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#43 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#44 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#45 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#46 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#47 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#48 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#49 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#50 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#51 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#52 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#53 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#54 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#55 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#56 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#57 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#58 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#59 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#60 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#61 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#62 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#63 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#64 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#65 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#66 0x0000000000619cfd in apply_lambda ()
No symbol table info available.
#67 0x00000000006180ed in eval_sub ()
No symbol table info available.
#68 0x0000000000649233 in readevalloop_eager_expand_eval ()
No symbol table info available.
--Type <RET> for more, q to quit, c to continue without paging--
#69 0x0000000000649b84 in readevalloop ()
No symbol table info available.
#70 0x0000000000649f89 in Feval_buffer ()
No symbol table info available.
#71 0x00000000006199da in funcall_subr ()
No symbol table info available.
#72 0x00000000006194e5 in Ffuncall ()
No symbol table info available.
#73 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#74 0x000000000061a30a in funcall_lambda ()
No symbol table info available.
#75 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#76 0x0000000000618f3f in call4 ()
No symbol table info available.
#77 0x0000000000647eb3 in Fload ()
No symbol table info available.
#78 0x00000000006199da in funcall_subr ()
No symbol table info available.
#79 0x00000000006194e5 in Ffuncall ()
No symbol table info available.
#80 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#81 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#82 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#83 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#84 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#85 0x0000000000619529 in Ffuncall ()
No symbol table info available.
#86 0x0000000000664a8f in exec_byte_code ()
No symbol table info available.
#87 0x0000000000619fa0 in funcall_lambda ()
No symbol table info available.
#88 0x0000000000619cfd in apply_lambda ()
No symbol table info available.
#89 0x00000000006180ed in eval_sub ()
No symbol table info available.
#90 0x0000000000617505 in Feval ()
No symbol table info available.
#91 0x000000000056c8ae in top_level_2 ()
No symbol table info available.
#92 0x0000000000615e1a in internal_condition_case ()
No symbol table info available.
#93 0x000000000056c8f3 in top_level_1 ()
No symbol table info available.
#94 0x00000000006156d3 in internal_catch ()
No symbol table info available.
#95 0x000000000056c7dd in command_loop ()
No symbol table info available.
#96 0x000000000056beec in recursive_edit_1 ()
No symbol table info available.
#97 0x000000000056c06a in Frecursive_edit ()
No symbol table info available.
#98 0x0000000000569b42 in main ()
No symbol table info available.
(gdb)
In GNU Emacs 26.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
of 2019-12-03 built on lgw01-amd64-029
Repository revision: ea9cfdb4812c1140416c523bac34a6ec72db7fce
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Ubuntu 20.04 LTS
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
scroll-up-command: End of buffer
mwheel-scroll: Beginning of buffer
Configured using:
'configure --prefix= --prefix=/snap/emacs/current/usr 'CFLAGS=
-I/build/emacs/parts/emacs/install/usr/include' 'CPPFLAGS=
-I/build/emacs/parts/emacs/install/usr/include' 'LDFLAGS=
-L/build/emacs/parts/emacs/install/lib
-L/build/emacs/parts/emacs/install/usr/lib
-L/build/emacs/parts/emacs/install/lib/x86_64-linux-gnu
-L/build/emacs/parts/emacs/install/usr/lib/x86_64-linux-gnu''
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM THREADS LIBSYSTEMD LCMS2
Important settings:
value of $LC_MONETARY: en_GB.UTF-8
value of $LC_NUMERIC: en_GB.UTF-8
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
format-spec rfc822 mml mml-sec epa derived epg gnus-util rmail
rmail-loaddefs mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils elec-pair finder-inf package easymenu
epg-config url-handlers url-parse auth-source cl-seq eieio eieio-core
cl-macs eieio-loaddefs password-cache url-vars seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib time-date mule-util tooltip eldoc
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win
x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow isearch timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame cl-generic cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932
hebrew greek romanian slovak czech european ethiopic indian cyrillic
chinese composite charscript charprop case-table epa-hook jka-cmpr-hook
help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)
Memory information:
((conses 16 108695 8696)
(symbols 48 21693 1)
(miscs 40 143 122)
(strings 32 32201 1775)
(string-bytes 1 873313)
(vectors 16 16052)
(vector-slots 8 526873 9856)
(floats 8 49 68)
(intervals 56 287 0)
(buffers 992 12))