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bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded

From: NiwTinray
Subject: bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded
Date: Sat, 4 Jan 2020 09:49:14 +0800

Hi, Emacs Dev, 

I was testing the new portable dumper with my personal Emacs. When I
loaded my dumped file, Emacs crashed on segmentation fault.
After tracking down the issue, I found the issues is caused by the
undo-tree mode in package "evil".
To reproduce the bug, try this:

emacs --batch -f package-initialize --eval='(use-package evil :ensure
t)' --eval='(dump-emacs-portable "test.pdmp")'  && emacs --dump-file

If I turned off the global-undo-tree-mode manually, it won't crash:

emacs --batch -f package-initialize --eval='(use-package evil :ensure
t)' --eval='(global-undo-tree-mode -1)' --eval='(dump-emacs-portable
"test.pdmp")'  && emacs --dump-file test.pdmp

So the problem must be exist in the undo-tree-mode.

I don't have the knowledge/techniques to track down the bug
further. Please help me investigate this!

Backtrace on crash:
#0  0x00000000004f1240 in Fcurrent_active_maps (olp=olp@entry=0x30, 
position=position@entry=0x0) at keymap.c:1541
#1  0x00000000004f167d in Fkey_binding (key=0x7fffefba745d, accept_default=0x0, 
no_remap=0x0, position=0x0) at keymap.c:1681
#2  0x00000000005546a3 in Ffuncall (nargs=2, args=args@entry=0x7fffffffd5d0) at 
#3  0x0000000000588d28 in exec_byte_code (bytestr=<optimized out>, 
vector=0x7fffefba2715, maxdepth=<optimized out>, args_template=<optimized out>, 
nargs=nargs@entry=0, args=<optimized out>, args@entry=0x7fffefba2718) at 
#4  0x000000000055439f in funcall_lambda (fun=0x7fffffffd5e3, 
nargs=nargs@entry=0, arg_vector=0x7fffefba2718, 
arg_vector@entry=0x7fffffffd768) at eval.c:2989
#5  0x00000000005545ef in Ffuncall (nargs=1, args=args@entry=0x7fffffffd760) at 
#6  0x0000000000588d28 in exec_byte_code (bytestr=<optimized out>, 
vector=0x7fffefba262d, maxdepth=<optimized out>, args_template=<optimized out>, 
nargs=nargs@entry=0, args=<optimized out>, args@entry=0x7fffefba2630) at 
#7  0x000000000055439f in funcall_lambda (fun=0x7fffffffd79e, 
nargs=nargs@entry=0, arg_vector=0x7fffefba2630, 
arg_vector@entry=0x7fffffffd958) at eval.c:2989
#8  0x00000000005545ef in Ffuncall (nargs=1, args=0x7fffffffd950) at eval.c:2808
#9  0x00000000005546e9 in funcall_nil (nargs=<optimized out>, args=<optimized 
out>) at eval.c:2435
#10 0x00000000005534a5 in run_hook_with_args (nargs=1, args=0x7fffffffd950, 
funcall=0x5546e0 <funcall_nil>) at eval.c:2612
#11 0x0000000000553616 in Frun_hook_with_args (args=0x7fffffffd950, nargs=1) at 
#12 run_hook (hook=0x7fffeefb53f0) at eval.c:2625
#13 Frun_hooks (nargs=1, args=0x7fffffffd9f8) at eval.c:2459
#14 0x00000000005546a3 in Ffuncall (nargs=2, args=args@entry=0x7fffffffd9f0) at 
#15 0x0000000000588d28 in exec_byte_code (bytestr=<optimized out>, 
vector=0x7fffefab5415, maxdepth=<optimized out>, args_template=<optimized out>, 
nargs=nargs@entry=1, args=<optimized out>, args@entry=0x7fffefab5418) at 
#16 0x000000000055439f in funcall_lambda (fun=0x7fffffffda66, 
nargs=nargs@entry=1, arg_vector=0x7fffefab5418, 
arg_vector@entry=0x7fffffffdbd0) at eval.c:2989
#17 0x00000000005545ef in Ffuncall (nargs=2, args=args@entry=0x7fffffffdbc8) at 
#18 0x0000000000588d28 in exec_byte_code (bytestr=<optimized out>, 
vector=0x7fffefc794ad, maxdepth=<optimized out>, args_template=<optimized out>, 
nargs=nargs@entry=0, args=<optimized out>, args@entry=0x7fffefc794b0) at 
#19 0x000000000055439f in funcall_lambda (fun=0x7fffffffdbf1, 
nargs=nargs@entry=0, arg_vector=0x7fffefc794b0, 
arg_vector@entry=0x7fffffffdd50) at eval.c:2989
#20 0x00000000005545ef in Ffuncall (nargs=nargs@entry=1, 
args=args@entry=0x7fffffffdd48) at eval.c:2808
#21 0x0000000000554758 in call0 (fn=0x7fffef08c260) at eval.c:2647
#22 0x000000000050a4ff in get_minibuffer (depth=depth@entry=0) at minibuf.c:754
#23 0x0000000000501283 in init_buffer () at buffer.c:5430
#24 0x00000000004139ba in main (argc=3, argv=<optimized out>) at emacs.c:1777

In GNU Emacs 27.0.60 (build 1, x86_64-pc-linux-gnu)
 of 2020-01-01 built on omnisky
Repository revision: 186152ba400b58d2d278c52d2e3d896decae767e
Repository branch: emacs-27
System Description: Ubuntu 16.04.6 LTS

Recent messages:
Saving file /home/ntr/.config/emacs/custom.el...
Wrote /home/ntr/.config/emacs/custom.el
helm-M-x: Package ‘evil-20190729.704’ is used by ‘evil-multiedit’ as 
dependency, not deleting
Mark saved where search started
Package ‘highlight-parentheses-20180704.1102’ deleted.
Mark saved where search started
Saving file /home/ntr/.config/emacs/bunny-core-packages.el...
Wrote /home/ntr/.config/emacs/bunny-core-packages.el

Configured using:
 'configure --with-x-toolkit=no'

Configured features:

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LC_CTYPE: zh_CN.UTF-8
  value of $LC_MONETARY: zh_CN.UTF-8
  value of $LC_NUMERIC: zh_CN.UTF-8
  value of $LC_TIME: zh_CN.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  doom-modeline-mode: t
  recentf-mode: t
  xterm-mouse-mode: t
  display-time-mode: t
  workgroups-mode: t
  keyfreq-autosave-mode: t
  keyfreq-mode: t
  global-magit-file-mode: t
  magit-file-mode: t
  magit-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  company-statistics-mode: t
  global-company-mode: t
  company-mode: t
  global-hungry-delete-mode: t
  hungry-delete-mode: t
  eyebrowse-mode: t
  helm-mode: t
  override-global-mode: t
  delete-selection-mode: t
  auto-revert-mode: t
  global-hl-line-mode: t
  which-key-mode: t
  global-evil-matchit-mode: t
  evil-matchit-mode: t
  global-evil-collection-unimpaired-mode: t
  evil-collection-unimpaired-mode: t
  evil-leader-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  shell-dirtrack-mode: t
  evil-mode: t
  evil-local-mode: t
  global-hl-todo-mode: t
  hl-todo-mode: t
  global-highlight-parentheses-mode: t
  highlight-parentheses-mode: t
  aggressive-indent-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  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
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

(evil-matchit-simple helm-ring em-unix em-term em-script em-prompt em-ls
em-hist em-pred em-dirs esh-var em-cmpl em-basic em-banner em-alias
esh-mode eshell esh-cmd esh-ext esh-opt esh-proc esh-io esh-arg
esh-module esh-groups shadow sort mail-extr emacsbug sendmail tabify ido
face-remap image-file mule-util view lsp-clients lsp-haxe lsp-erlang
lsp-fsharp lsp-metals lsp-elm lsp-dart lsp-clojure lsp-go lsp-xml
lsp-css lsp-intelephense lsp-vetur lsp-html lsp-solargraph lsp-rust
lsp-pyls lsp helm-for-files helm-bookmark helm-adaptive helm-external
helm-net ffap vc-mtn vc-hg vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs vc
vc-dispatcher jka-compr eieio-opt speedbar sb-image ezimage dframe
help-fns radix-tree so-long winner helm-command helm-elisp helm-eval
edebug backtrace helm-info term/xterm xterm doom-modeline
doom-modeline-segments doom-modeline-env doom-modeline-core recentf
magit-bookmark bookmark ediff ediff-merg ediff-mult ediff-wind
ediff-diff ediff-help ediff-init ediff-util xt-mouse bunny-sshfs
flymake-diagnostic-at-point popup lsp-python-ms
python-el-fgallina-expansions python tramp-sh tramp tramp-loaddefs
trampver tramp-integration files-x tramp-compat parse-time iso8601
ls-lisp company-lsp lsp-mode ewoc markdown-mode tree-widget spinner
network-stream nsm inline ht em-glob esh-util dash-functional bindat
flymake-proc flymake warnings bunny-pyenv eldoc-eval all-the-icons
all-the-icons-faces data-material data-weathericons data-octicons
data-fileicons data-faicons data-alltheicons memoize eshell-git-prompt
leuven-theme time bunny-insert-surroundings bunny-krws
bunny-company-simple-complete bunny-eshell-extensions
bunny-terminal-here bunny-workgroups bunny-register-jumper bunny-h5ls
bunny-prettify-json-file web-server web-server-status-codes keyfreq
evil-magit 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 magit-merge magit-branch magit-reset magit-files magit-refs
magit-status magit magit-repos magit-apply magit-wip magit-log
which-func imenu magit-diff smerge-mode magit-core magit-autorevert
magit-margin magit-transient magit-process magit-mode git-commit
magit-git magit-section magit-utils crm log-edit message rmc rfc822 mml
mml-sec epa derived epg epg-config mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader pcvs-util add-log
with-editor async-bytecomp server git-timemachine transient vc-git
diff-mode org-preview-html eww mm-url gnus nnheader gnus-util rmail
rmail-loaddefs rfc2047 rfc2045 ietf-drums mail-utils mm-util mail-prsvr
url-queue shr text-property-search puny svg xml the-org-mode-expansions
org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-footnote
org-src ob-comint org-pcomplete org-list org-faces org-entities
time-date noutline outline org-version ob-emacs-lisp ob-core ob-eval
org-table ol org-keys org-compat org-macs org-loaddefs find-func
cal-menu calendar cal-loaddefs company-statistics company-oddmuse
company-keywords company-etags etags fileloop generator company-gtags
company-dabbrev-code company-dabbrev company-files company-capf
company-cmake company-xcode company-clang company-semantic company-eclim
company-template company-bbdb company pcase multi-term shell-pop term
disp-table ehelp htmlize hungry-delete expand-region
text-mode-expansions html-mode-expansions er-basic-expansions
expand-region-core expand-region-custom golden-ratio eyebrowse
use-package-diminish buffer-move transpose-frame helm-ag helm-descbinds
helm-projectile cus-edit cus-start cus-load wid-edit helm-mode
helm-files helm-buffers helm-occur helm-tags helm-locate helm-grep
helm-regexp format-spec helm-utils helm-help helm-types helm helm-source
eieio-compat helm-multi-match helm-lib async use-package-bind-key
bind-key counsel xdg xref project swiper ivy delsel colir ivy-overlay
ace-window avy ace-jump-zap ace-jump-mode cl ranger autorevert
filenotify hl-line evil-collection-dired dired dired-loaddefs
evil-collection-neotree neotree projectile grep compile ibuf-ext ibuffer
ibuffer-loaddefs shrink-path rx f s dash which-key evil-multiedit iedit
iedit-lib evil-nerd-commenter evil-nerd-commenter-operator
evil-nerd-commenter-sdk sgml-mode dom evil-matchit evil-matchit-sdk
evil-collection-unimpaired evil-collection
bunny-minor-mode-leader-keymap zone-rainbow color zone symbol-overlay
evil-leader 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 advice evil-common windmove thingatpt
rect evil-digraphs evil-vars edmacro kmacro hl-todo posframe
rainbow-delimiters highlight-parentheses move-text macrostep ring pp
exec-path-from-shell try url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util mailcap anaphora
aggressive-indent easy-mmode cl-extra help-mode use-package-ensure
use-package-core finder-inf info package easymenu browse-url
url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json subr-x map url-vars seq byte-opt gv
bytecomp byte-compile cconv cl-loaddefs cl-lib 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 tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer 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 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 inotify dynamic-setting system-font-setting
font-render-setting x multi-tty make-network-process emacs)

Memory information:
((conses 16 632937 99192)
 (symbols 48 53853 52)
 (strings 32 181171 13075)
 (string-bytes 1 5457906)
 (vectors 16 89834)
 (vector-slots 8 1780900 209238)
 (floats 8 893 401)
 (intervals 56 24129 5564)
 (buffers 1000 48)
 (heap 1024 49509 3144))

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