GNU bug report logs - #31936
26.1; Fatal error 6: Aborted, when unflagging mail in mu4e header buffer

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

From: Dominik Schrempf <dominik.schrempf <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.1;
 Fatal error 6: Aborted, when unflagging mail in mu4e header buffer
Date: Fri, 22 Jun 2018 15:26:29 +0200

Hello,

when I try to unflag mail in the mu4e header view buffer, Emacs crashes with
"Fatal error 6: Aborted". The backtrace and information about my environment can
be found below.

Thank you very much for looking into this.

Kind regards,
Dominik

# Expected or desired behavior

Unflag mail in mu4e (header view).

# Actual behavior

Emacs crashes.

# Steps to reproduce

1. Enter `mu4e`.
2. Enter a maildir, e.g., with `j i` (`i` for Inbox).
3. Unflag a flagged (starred) mail.
4. Emacs crashes.

# Versions of mu, mu4e/emacs, operating system etc.

   uname -a
   Linux schwarzbaer 4.17.2-1-ARCH #1 SMP PREEMPT Sat Jun 16 11:08:59 UTC 2018 
   x86_64 GNU/Linux

   emacs --version
   GNU Emacs 26.1

   pacman -Qs emacs
   local/emacs 26.1-1

   mu --version
   mu (mail indexer/searcher) version 1.0

   pacman -Qs mu4e
   local/mu 1.0-3

I use spacemacs, development branch, now at commit
6b4a79d3981419526a84956161b0e639c1a3d5a9, not sure if this is relevant.

I am not sure about the mu4e/emacs version, the variable `mu4e-mu-version` has
value `1.0`.

# Any other detail

Maybe this is a problem of Arch (some glib thing, but I have no idea). I found
similar backtraces in Arch and ElementaryOS online.

I had reported this bug at the mu4e project page on GitHub
(https://github.com/djcb/mu/issues/1271#issuecomment-399373752) and was referred
to reporting here, directly in Emacs.


# Backtrace

Fatal error 6: Aborted
(emacs:20589): GLib-WARNING **: 15:10:40.701: g_main_context_prepare() called 
recursively from within a source's check() or prepare() member.

(emacs:20589): GLib-WARNING **: 15:10:40.701: g_main_context_check() called 
recursively from within a source's check() or prepare() member.

Backtrace:
/usr/bin/emacs[0x50f76f]
/usr/bin/emacs[0x4f4aa2]
/usr/bin/emacs[0x50f824]
/usr/bin/emacs[0x452e6b]
/usr/bin/emacs[0x45561d]
/usr/bin/emacs[0x5af552]
/usr/bin/emacs[0x5b7585]
/usr/bin/emacs[0x4f4848]
/usr/bin/emacs[0x4c090a]
/usr/bin/emacs[0x4c484b]
/usr/bin/emacs[0x4c48db]
/usr/lib/libX11.so.6(_XError+0x11d)[0x7ffff4eda6ed]
/usr/lib/libX11.so.6(+0x41617)[0x7ffff4ed7617]
/usr/lib/libX11.so.6(+0x416d5)[0x7ffff4ed76d5]
/usr/lib/libX11.so.6(_XEventsQueued+0x55)[0x7ffff4ed7fd5]
/usr/lib/libX11.so.6(XPending+0x57)[0x7ffff4ec9ca7]
/usr/lib/libgdk-3.so.0(+0x66f6f)[0x7ffff66f8f6f]
/usr/lib/libglib-2.0.so.0(g_main_context_prepare+0x1c9)[0x7ffff5644a49]
/usr/lib/libglib-2.0.so.0(+0x4c44e)[0x7ffff564544e]
/usr/lib/libglib-2.0.so.0(g_main_context_pending+0x29)[0x7ffff56455e9]
/usr/lib/libgtk-3.so.0(gtk_events_pending+0xf)[0x7ffff6bb6e3f]
/usr/bin/emacs[0x4c1339]
/usr/bin/emacs[0x4fbeb9]
/usr/bin/emacs[0x4fc585]
/usr/bin/emacs[0x5dd884]
/usr/bin/emacs[0x5861e4]
/usr/bin/emacs[0x5e03db]
/usr/bin/emacs[0x5e0663]
/usr/bin/emacs[0x5e097c]
/usr/bin/emacs[0x443ce4]
/usr/bin/emacs[0x44b048]
/usr/bin/emacs[0x44fe9b]
/usr/bin/emacs[0x4637a3]
/usr/bin/emacs[0x4666ab]
/usr/bin/emacs[0x56bef7]
/usr/bin/emacs[0x42fe93]
/usr/bin/emacs[0x4536bd]
/usr/bin/emacs[0x4fec61]
/usr/bin/emacs[0x5027a8]
/usr/bin/emacs[0x503ec4]
/usr/bin/emacs[0x56be5f]
...

Thread 1 "emacs" received signal SIGABRT, Aborted.
0x00007ffff111791b in raise () from /usr/lib/libpthread.so.0

# Output of 'bt_full' in gdb

#0  0x00007ffff111791b in raise () at /usr/lib/libpthread.so.0
#1  0x00000000004f4a6c in  ()
#2  0x000000000050f824 in  ()
#3  0x0000000000452e6b in  ()
#4  0x000000000045561d in  ()
#5  0x00000000005af552 in  ()
#6  0x00000000005b7585 in  ()
#7  0x00000000004f4848 in  ()
#8  0x00000000004c090a in  ()
#9  0x00000000004c484b in  ()
#10 0x00000000004c48db in  ()
#11 0x00007ffff4eda6ed in _XError () at /usr/lib/libX11.so.6
#12 0x00007ffff4ed7617 in  () at /usr/lib/libX11.so.6
#13 0x00007ffff4ed76d5 in  () at /usr/lib/libX11.so.6
#14 0x00007ffff4ed7fd5 in _XEventsQueued () at /usr/lib/libX11.so.6
#15 0x00007ffff4ec9ca7 in XPending () at /usr/lib/libX11.so.6
#16 0x00007ffff66f8f6f in  () at /usr/lib/libgdk-3.so.0
#17 0x00007ffff5644a49 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#18 0x00007ffff564544e in  () at /usr/lib/libglib-2.0.so.0
#19 0x00007ffff56455e9 in g_main_context_pending () at /usr/lib/libglib-2.0.so.0
#20 0x00007ffff6bb6e3f in gtk_events_pending () at /usr/lib/libgtk-3.so.0
#21 0x00000000004c1339 in  ()
#22 0x00000000004fbeb9 in  ()
#23 0x00000000004fc585 in  ()
#24 0x00000000005dd884 in  ()
#25 0x00000000005861e4 in  ()
#26 0x00000000005e03db in  ()
#27 0x00000000005e0663 in  ()
#28 0x00000000005e097c in  ()
#29 0x0000000000443ce4 in  ()
#30 0x000000000044b048 in  ()
#31 0x000000000044fe9b in  ()
#32 0x00000000004637a3 in  ()
#33 0x00000000004666ab in  ()
#34 0x000000000056bef7 in  ()
#35 0x000000000042fe93 in  ()
#36 0x00000000004536bd in  ()
#37 0x00000000004fec61 in  ()
#38 0x00000000005027a8 in  ()
#39 0x0000000000503ec4 in  ()
#40 0x000000000056be5f in  ()
#41 0x00000000004f4e85 in  ()
#42 0x000000000056bdce in  ()
#43 0x00000000004f4e1d in  ()
#44 0x00000000004fa018 in  ()
#45 0x00000000004fa358 in  ()
#46 0x00000000004157eb in  ()
#47 0x00007ffff026c06b in __libc_start_main () at /usr/lib/libc.so.6
#48 0x000000000041658a in  ()

# Output of 'xbacktrace' in gdb

The command 'xbacktrace' is not availble.

Undefined command: "xbacktrace".  Try "help".

######################################################################

In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
of 2018-05-29 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.12000000
Recent messages:
Loading /home/dominik/.spacemacs...done
PNG warning: Interlace handling should be turned on when using png_read_image
Starting a server...
Starting new Ispell process /usr/bin/aspell with default dictionary...
Spacemacs is ready.
Loading /home/dominik/.emacs.d/.cache/recentf...done
Skipping check for new version (reason: dotfile)
Auto-evilification could not remap these functions in map ‘edebug-mode-map’:
  - ‘edebug-Go-nonstop-mode’ originally mapped on ‘G’

Configured using:
'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
--localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-modules
'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong
-fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2
LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY ACL
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11
MODULES THREADS LIBSYSTEMD LCMS2

Important settings:
 value of $LANG: en_US.UTF-8
 locale-coding-system: utf-8-unix

Major mode: Spacemacs buffer

Minor modes in effect:
 global-git-gutter+-mode: t
 global-git-commit-mode: t
 async-bytecomp-package-mode: t
 pupo-mode: t
 purpose-mode: t
 evil-escape-mode: t
 helm-descbinds-mode: t
 helm-mode: t
 helm-flx-mode: t
 projectile-mode: t
 recentf-mode: t
 winner-mode: t
 winum-mode: t
 global-vi-tilde-fringe-mode: t
 spaceline-info-mode: t
 spaceline-helm-mode: t
 save-place-mode: t
 savehist-mode: t
 popwin-mode: t
 persp-mode: t
 eyebrowse-mode: t
 global-anzu-mode: t
 anzu-mode: t
 editorconfig-mode: t
 clean-aindent-mode: t
 which-key-mode: t
 override-global-mode: t
 global-undo-tree-mode: t
 undo-tree-mode: t
 shell-dirtrack-mode: t
 evil-mode: t
 evil-local-mode: t
 spacemacs-leader-override-mode: t
 global-spacemacs-leader-override-mode: t
 global-hl-line-mode: t
 xterm-mouse-mode: t
 global-auto-revert-mode: t
 ido-vertical-mode: t
 global-page-break-lines-mode: t
 page-break-lines-mode: t
 global-eldoc-mode: t
 electric-indent-mode: t
 mouse-wheel-mode: t
 file-name-shadow-mode: t
 global-font-lock-mode: t
 font-lock-mode: t
 auto-composition-mode: t
 auto-encryption-mode: t
 auto-compression-mode: t
 buffer-read-only: t
 column-number-mode: t
 line-number-mode: t
 transient-mark-mode: t

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/usr/share/emacs/26.1/lisp/org/ob-io
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-lisp hides 
/usr/share/emacs/26.1/lisp/org/ob-lisp
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-eshell 
hides /usr/share/emacs/26.1/lisp/org/org-eshell
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-coq hides 
/usr/share/emacs/26.1/lisp/org/ob-coq
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-keys hides 
/usr/share/emacs/26.1/lisp/org/ob-keys
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-java hides 
/usr/share/emacs/26.1/lisp/org/ob-java
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ox-texinfo 
hides /usr/share/emacs/26.1/lisp/org/ox-texinfo
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-shen hides 
/usr/share/emacs/26.1/lisp/org/ob-shen
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ox-md hides 
/usr/share/emacs/26.1/lisp/org/ox-md
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-picolisp 
hides /usr/share/emacs/26.1/lisp/org/ob-picolisp
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-docview 
hides /usr/share/emacs/26.1/lisp/org/org-docview
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-table 
hides /usr/share/emacs/26.1/lisp/org/org-table
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-ocaml 
hides /usr/share/emacs/26.1/lisp/org/ob-ocaml
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-forth 
hides /usr/share/emacs/26.1/lisp/org/ob-forth
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob hides 
/usr/share/emacs/26.1/lisp/org/ob
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-ebnf hides 
/usr/share/emacs/26.1/lisp/org/ob-ebnf
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-src hides 
/usr/share/emacs/26.1/lisp/org/org-src
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-table 
hides /usr/share/emacs/26.1/lisp/org/ob-table
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-screen 
hides /usr/share/emacs/26.1/lisp/org/ob-screen
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org hides 
/usr/share/emacs/26.1/lisp/org/org
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-R hides 
/usr/share/emacs/26.1/lisp/org/ob-R
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-footnote 
hides /usr/share/emacs/26.1/lisp/org/org-footnote
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-faces 
hides /usr/share/emacs/26.1/lisp/org/org-faces
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-sed hides 
/usr/share/emacs/26.1/lisp/org/ob-sed
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-css hides 
/usr/share/emacs/26.1/lisp/org/ob-css
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-macs 
hides /usr/share/emacs/26.1/lisp/org/org-macs
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-agenda 
hides /usr/share/emacs/26.1/lisp/org/org-agenda
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-lob hides 
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/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-install 
hides /usr/share/emacs/26.1/lisp/org/org-install
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hides /usr/share/emacs/26.1/lisp/org/ob-plantuml
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-mobile 
hides /usr/share/emacs/26.1/lisp/org/org-mobile
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/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-irc hides 
/usr/share/emacs/26.1/lisp/org/org-irc
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-stan hides 
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/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/org-habit 
hides /usr/share/emacs/26.1/lisp/org/org-habit
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-lua hides 
/usr/share/emacs/26.1/lisp/org/ob-lua
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ox-publish 
hides /usr/share/emacs/26.1/lisp/org/ox-publish
/home/dominik/.emacs.d/elpa/26.1/develop/org-plus-contrib-20180618/ob-ruby hides 
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hides /usr/share/emacs/26.1/lisp/org/org-attach
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/usr/share/emacs/26.1/lisp/org/ob-calc

Features:
(shadow sort editorconfig-core editorconfig-core-handle editorconfig-fnmatch
mail-extr emacsbug git-gutter-fringe+ fringe-helper git-gutter+ git-commit
with-editor magit-git magit-section magit-utils crm magit-popup async-bytecomp
log-edit message rmc puny rfc822 mml mml-sec epa gnus-util rmail rmail-loaddefs
mailabbrev gmm-utils mailheader pcvs-util add-log tramp tramp-compat
tramp-loaddefs trampver ucs-normalize parse-time spacemacs-purpose-popwin
window-purpose-x imenu-list imenu dired dired-loaddefs window-purpose
window-purpose-fixes window-purpose-prefix-overload window-purpose-switch
let-alist window-purpose-layout window-purpose-core window-purpose-configuration
window-purpose-utils evil-escape helm-command helm-elisp helm-eval edebug
helm-info helm-descbinds helm-mode helm-files helm-buffers helm-tags helm-locate
helm-grep helm-regexp helm-utils helm-help helm-types helm-flx helm helm-source
helm-multi-match helm-lib diminish projectile grep ibuf-ext ibuffer
ibuffer-loaddefs recentf tree-widget pkgbuild-mode compile sh-script smie
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string-inflection spaceline-config spaceline-segments spaceline powerline
powerline-separators color powerline-themes saveplace savehist popwin persp-mode
google-c-style eyebrowse evil-unimpaired f s dash evil-anzu anzu editorconfig
noutline outline clean-aindent-mode clang-format xml rx tex-site hybrid-mode
evil-evilified-state which-key use-package use-package-ensure
use-package-delight use-package-diminish use-package-bind-key bind-key
use-package-core async hydra lv cus-edit cus-start cus-load evil
evil-integration undo-tree diff evil-maps evil-commands reveal flyspell ispell
evil-jumps evil-command-window evil-types evil-search evil-ex shell pcomplete
comint ansi-color evil-macros evil-repeat evil-states evil-core evil-common
windmove thingatpt rect evil-digraphs evil-vars ring bind-map quelpa mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums
mail-prsvr lisp-mnt help-fns radix-tree hl-line xt-mouse autorevert filenotify
cl-extra disp-table wid-edit spacemacs-dark-theme spacemacs-common format-spec
info finder-inf ido-vertical-mode ido core-spacemacs core-use-package-ext
core-transient-state core-micro-state core-toggle core-keybindings
core-fonts-support core-themes-support core-display-init core-jump
core-release-management core-custom-settings core-configuration-layer
eieio-compat core-progress-bar core-spacemacs-buffer core-funcs
core-dotspacemacs ht cl help-mode warnings package url-handlers url-parse
auth-source cl-seq password-cache url-vars seq eieio byte-opt bytecomp
byte-compile cconv eieio-core eieio-loaddefs epg epg-config core-command-line
pcase core-debug edmacro kmacro derived cl-macs gv advice profiler easymenu
cl-loaddefs cl-lib core-hooks page-break-lines easy-mmode core-emacs-backports
subr-x core-dumper 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 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 743738 610278)
(symbols 48 56471 73)
(miscs 40 1391 601)
(strings 32 152489 99138)
(string-bytes 1 5236471)
(vectors 16 73303)
(vector-slots 8 1285802 228312)
(floats 8 440 777)
(intervals 56 2121 470)
(buffers 992 15))

Message #8 received at 31936 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Dominik Schrempf <dominik.schrempf <at> gmail.com>
Cc: 31936 <at> debbugs.gnu.org
Subject: Re: bug#31936: 26.1;
 Fatal error 6: Aborted, when unflagging mail in mu4e header buffer
Date: Fri, 22 Jun 2018 17:28:48 +0200

Dominik Schrempf <dominik.schrempf <at> gmail.com> writes:

> Hello,
>
> when I try to unflag mail in the mu4e header view buffer, Emacs crashes with
> "Fatal error 6: Aborted". The backtrace and information about my environment can
> be found below.
>

This looks like another occurence of 30874. We recently added the
following the etc/DEBUG:

     For X protocol errors related to displaying unusual characters or to
     font-related customizations, try invoking Emacs like this:

       XFT_DEBUG=16 emacs -xrm "emacs.synchronous: true"

which should give an indication the XFT was loading some kind of emoji
font just before emacs crashed if itʼs the same issue.

If it is the same, we recently fixed this bug in the latest versions
of emacs-26 and the master branch, which are available from our git
repository.

Regards

Robert

Message #11 received at 31936 <at> debbugs.gnu.org (full text, mbox):

From: Dominik Schrempf <dominik.schrempf <at> gmail.com>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: 31936 <at> debbugs.gnu.org
Subject: Re: bug#31936: 26.1;
 Fatal error 6: Aborted, when unflagging mail in mu4e header buffer
Date: Sat, 23 Jun 2018 15:49:21 +0200

Hello,

you are right. Thanks for the info.

Regards,
Dominik

[Sat Jun 23 14:51:14 dominik <at> schwarzbaer: ~]$        XFT_DEBUG=16 emacs -xrm 
"emacs.synchronous: true"
XFT_DEBUG=16
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches new
Loading file /usr/share/fonts/TTF/DejaVuSansMono.ttf/0
FontFile /usr/share/fonts/TTF/DejaVuSansMono-Oblique.ttf/0 matches new
Loading file /usr/share/fonts/TTF/DejaVuSansMono-Oblique.ttf/0
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches existing (2)
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches existing (2)
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches existing (2)
FontFile /usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf/0 matches new
Loading file /usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf/0
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches existing (2)
FontFile /usr/share/fonts/TTF/DejaVuSansMono.ttf/0 matches existing (2)
FontFile 
/usr/share/fonts/mathjax/HTML-CSS/STIX-Web/woff/STIXMathJax_Misc-Regular.woff/0 
matches new
Loading file 
/usr/share/fonts/mathjax/HTML-CSS/STIX-Web/woff/STIXMathJax_Misc-Regular.woff/0
FontFile /usr/share/fonts/TTF/DejaVuSans.ttf/0 matches new
Loading file /usr/share/fonts/TTF/DejaVuSans.ttf/0
FontFile /usr/share/fonts/noto/NotoColorEmoji.ttf/0 matches new
Loading file /usr/share/fonts/noto/NotoColorEmoji.ttf/0

Robert Pluim <rpluim <at> gmail.com> writes:

> Dominik Schrempf <dominik.schrempf <at> gmail.com> writes:
>
>> Hello,
>>
>> when I try to unflag mail in the mu4e header view buffer, Emacs crashes with
>> "Fatal error 6: Aborted". The backtrace and information about my environment 
>> can
>> be found below.
>>
>
> This looks like another occurence of 30874. We recently added the
> following the etc/DEBUG:
>
>      For X protocol errors related to displaying unusual characters or to
>      font-related customizations, try invoking Emacs like this:
>
>        XFT_DEBUG=16 emacs -xrm "emacs.synchronous: true"
>
> which should give an indication the XFT was loading some kind of emoji
> font just before emacs crashed if itʼs the same issue.
>
> If it is the same, we recently fixed this bug in the latest versions
> of emacs-26 and the master branch, which are available from our git
> repository.
>
> Regards
>
> Robert

Message #16 received at 31936 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Dominik Schrempf <dominik.schrempf <at> gmail.com>
Cc: 31936 <at> debbugs.gnu.org
Subject: Re: bug#31936: 26.1;
 Fatal error 6: Aborted, when unflagging mail in mu4e header buffer
Date: Wed, 27 Jun 2018 11:18:14 +0200

close 31936
forcemerge 30874 31936
quit

Dominik Schrempf <dominik.schrempf <at> gmail.com> writes:

> Hello,
>
> you are right. Thanks for the info.

Thanks for checking. Iʼve marked this as a duplicate of 30874, and am
closing the bug.

Robert

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