GNU bug report logs - #47896
27.2; TRAMP hang/lockup/fault on compile/file access

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: David Greene <dag <at> obbligato.org>
Subject: bug#47896: closed (Re: bug#47896: 27.2; TRAMP hang/lockup/fault
 on compile/file access)
Date: Fri, 25 Jun 2021 12:28:08 +0000

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

Your bug report

#47896: 27.2; TRAMP hang/lockup/fault on compile/file access

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 47896 <at> debbugs.gnu.org.

-- 
47896: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=47896
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Michael Albinus <michael.albinus <at> gmx.de>
To: dag <dag <at> obbligato.org>
Cc: 47896-done <at> debbugs.gnu.org
Subject: Re: bug#47896: 27.2; TRAMP hang/lockup/fault on compile/file access
Date: Fri, 25 Jun 2021 14:26:59 +0200

Michael Albinus <michael.albinus <at> gmx.de> writes:

Hi David,

> Anything else I could do for you? Otherwise, I'd like to close the bug.

No further information, so I'm closing the bug.

Best regards, Michael.

[Message part 3 (message/rfc822, inline)]

From: David Greene <dag <at> obbligato.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.2; TRAMP hang/lockup/fault on compile/file access
Date: Mon, 19 Apr 2021 13:35:25 -0500

[Message part 4 (text/plain, inline)]

I've been trying to track down an issue with TRAMP that has plagued me
for over a year.

In emacs 27, I frequently get "hangs" opening new files. Sometimes emacs
doesn;'t lock up but sits in the "encoding/decoding remote file" stage
for ever and the file never loads. Other times I get a hard lockup at
"Inserting..." A quit does not end the lockup, I have to go to another
terminal and kill -SIGUSR2 many times to get emacs to respond again.

This is especially bad in compile mode where any compiler message
triggers a similar lockup of emacs, presumably when compile is trying to
load the file referred to in the error message.

So I tried emacs 28. No lockups at all. Yay! But every single compile
failes with exit code 9. This isn't an error from the compilation
itself. I can run the compilation under emacs 27 and it completes (that
is, when it doesn't cause a lockup) and I can run it in a terminal and
it completes. I suspect that whatever was causing lockups in emacs 27 is
now causing signal 9 in 28. Perhaps this has something to do with the
new process handling in 28?

I have tried disabling as much of my config as I can but nothing seems
to help.

Here is a backtrace after SIGUSR2 during a compile lockup:

Debugger entered--entering a function:
* tramp-signal-hook-function(quit nil)
  format-time-string("%T." (24701 49656 439373 0))
  tramp-debug-message((tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) "(5) # Looking for regexp \"%s\" from remote shell" "\\(\\(\\(?:Store key in cache\\? (y/\\|Update cached ke...")
  apply(tramp-debug-message (tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) "(5) # Looking for regexp \"%s\" from remote shell" "\\(\\(\\(?:Store key in cache\\? (y/\\|Update cached ke...")
  tramp-process-one-action(#<process *tramp/ssh dgreene <at> dgreene-dev*> (tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) ((tramp-login-prompt-regexp tramp-action-login) (tramp-password-prompt-regexp tramp-action-password) (tramp-wrong-passwd-regexp tramp-action-permission-denied) (shell-prompt-pattern tramp-action-succeed) (tramp-shell-prompt-pattern tramp-action-succeed) (tramp-yesno-prompt-regexp tramp-action-yesno) (tramp-yn-prompt-regexp tramp-action-yn) (tramp-terminal-prompt-regexp tramp-action-terminal) (tramp-antispoof-regexp tramp-action-confirm-message) (tramp-process-alive-regexp tramp-action-process-alive)))
  tramp-process-actions(#<process *tramp/ssh dgreene <at> dgreene-dev*> (tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) 1 ((tramp-login-prompt-regexp tramp-action-login) (tramp-password-prompt-regexp tramp-action-password) (tramp-wrong-passwd-regexp tramp-action-permission-denied) (shell-prompt-pattern tramp-action-succeed) (tramp-shell-prompt-pattern tramp-action-succeed) (tramp-yesno-prompt-regexp tramp-action-yesno) (tramp-yn-prompt-regexp tramp-action-yn) (tramp-terminal-prompt-regexp tramp-action-terminal) (tramp-antispoof-regexp tramp-action-confirm-message) (tramp-process-alive-regexp tramp-action-process-alive)) 60)
  tramp-maybe-open-connection((tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil))
  tramp-send-command((tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) "\\readlink --canonicalize-missing /net/dgreene-dev/...")
  tramp-send-command-and-check((tramp-file-name #("ssh" 0 3 (tramp-default t)) "dgreene" nil "dgreene-dev" nil "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/..." nil) "\\readlink --canonicalize-missing /net/dgreene-dev/...")
  tramp-sh-handle-file-truename(#("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  apply(tramp-sh-handle-file-truename #("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  tramp-sh-file-name-handler(file-truename #("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  apply(tramp-sh-file-name-handler file-truename #("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  tramp-file-name-handler(file-truename #("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  file-truename(#("/ssh:dgreene <at> dgreene-dev:/net/dgreene-dev/srv/nfs/..." 1 4 (tramp-default t)))
  compilation-get-file-structure(("src/ws/stack/project.mk" . "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/...") nil)
  compilation-internal-error-properties(("src/ws/stack/project.mk" . "/net/dgreene-dev/srv/nfs/dgreene-data/ws/<redacted>/...") 4 nil nil nil 2 nil)
  compilation-error-properties(1 2 4 3 5 (6 . 7) nil)
  compilation-parse-errors(1390442 1391425)
  compilation--parse-region(1390442 #<marker at 1391469 in *clang-build-tdcleanup-all-legacy-devrel-local-dgreene-dev*>)
  compilation--ensure-parse(1391469)
  compilation-filter(#<process compilation> "/ws/stack/project.mk:4: x86_64 is the build arch\n[...")
  read-from-minibuffer("M-x " nil (keymap keymap (36 . ivy-magic-read-file-env) (3 keymap (19 . ivy-rotate-sort) (1 . ivy-toggle-ignore) (15 . ivy-occur)) (33554464 . ivy-restrict-to-matches) (15 . hydra-ivy/body) (22 . ivy-scroll-up-command) (prior . ivy-scroll-down-command) (next . ivy-scroll-up-command) (7 . minibuffer-keyboard-quit) (right . ivy-forward-char) (32 . self-insert-command) (18 . ivy-reverse-i-search) (remap keymap (describe-mode . ivy-help) (kill-ring-save . ivy-kill-ring-save) (kill-whole-line . ivy-kill-whole-line) (kill-line . ivy-kill-line) (scroll-down-command . ivy-scroll-down-command) (scroll-up-command . ivy-scroll-up-command) (end-of-buffer . ivy-end-of-buffer) (beginning-of-buffer . ivy-beginning-of-buffer) (kill-word . ivy-kill-word) (forward-char . ivy-forward-char) (delete-char . ivy-delete-char) (backward-kill-word . ivy-backward-kill-word) (backward-delete-char-untabify . ivy-backward-delete-char) (delete-backward-char . ivy-backward-delete-char) (previous-line . ivy-previous-line) (next-line . ivy-next-line)) (9 . ivy-partial-or-done) (10 . ivy-alt-done) (27 keymap (1 . ivy-read-action) (15 . ivy-dispatching-call) (111 . ivy-dispatching-done) (25 . ivy-insert-current-full) (105 . ivy-insert-current) (106 . ivy-yank-word) (114 . ivy-toggle-regexp-quote) (97 . ivy-toggle-marks) (16 . ivy-previous-line-and-call) (14 . ivy-next-line-and-call) (118 . ivy-scroll-down-command) (112 . ivy-previous-history-element) (110 . ivy-next-history-element) (10 . ivy-immediate-done) (13 . ivy-call)) (mouse-3 . ivy-mouse-dispatching-done) (mouse-1 . ivy-mouse-done) (down-mouse-1 . ignore) (13 . ivy-done)) nil extended-command-history)
  ivy-read("M-x " #f(compiled-function (string pred action) #<bytecode 0x40e60ea9>) :predicate commandp :require-match t :initial-input nil :preselect nil :def nil :history extended-command-history :keymap nil :dynamic-collection nil :extra-props (:caller ivy-completing-read) :caller execute-extended-command)
  ivy-completing-read("M-x " #f(compiled-function (string pred action) #<bytecode 0x40e60ea9>) commandp t nil extended-command-history nil nil)
  completing-read("M-x " #f(compiled-function (string pred action) #<bytecode 0x40e60ea9>) commandp t nil extended-command-history)
  read-extended-command()
  byte-code("\302\30\11\303 \10E)\207" [execute-extended-command--last-typed current-prefix-arg nil read-extended-command] 3)
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)

I've attached TRAMP verbose 6 output.

David

In GNU Emacs 27.2 (build 1, aarch64-apple-darwin20.2.0, NS appkit-2022.20 Version 11.1 (Build 20C69))
 of 2021-04-01 built on Davids-MacBook-Pro.local
Windowing system distributor 'Apple', version 10.3.2022
System Description:  macOS 11.2.3

Recent messages:
Tramp: Sending command ‘exec ssh -l dgreene   -e none dgreene-dev’
Tramp: Waiting for prompts from remote shell...
Entering debugger...
o is undefined
m is undefined
tramp-signal-hook-function: No previous stack frame
Compilation finished
Saved text from "Debugger entered--entering a function:
*"
Quit: "" [2 times]

Configured using:
 'configure --disable-dependency-tracking --disable-silent-rules
 --enable-locallisppath=/opt/homebrew/share/emacs/site-lisp
 --infodir=/opt/homebrew/Cellar/emacs-plus <at> 27/27.2/share/info/emacs
 --prefix=/opt/homebrew/Cellar/emacs-plus <at> 27/27.2 --with-xml2
 --with-gnutls --without-dbus --with-imagemagick --with-modules
 --with-rsvg --with-ns --disable-ns-self-contained'

Configured features:
RSVG IMAGEMAGICK GLIB NOTIFY KQUEUE ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS XIM NS MODULES THREADS JSON PDUMPER LCMS2 GMP

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

Major mode: InactiveMinibuffer

Minor modes in effect:
  recentf-mode: t
  ivy-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  display-time-mode: t
  global-so-long-mode: t
  global-company-mode: t
  volatile-highlights-mode: t
  global-hl-todo-mode: t
  electric-pair-mode: t
  show-paren-mode: t
  shell-dirtrack-mode: t
  global-whitespace-mode: t
  whitespace-mode: t
  override-global-mode: t
  straight-use-package-mode: t
  straight-package-neutering-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-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
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
/Users/dag/.emacs.d/straight/build/boxquote/boxquote hides /Users/dag/lib/dotfiles/emacs/lisp/boxquote
/Users/dag/.emacs.d/straight/build/cmake-mode/cmake-mode hides /opt/homebrew/share/emacs/site-lisp/cmake/cmake-mode
/Users/dag/.emacs.d/straight/build/password-store/password-store hides /opt/homebrew/share/emacs/site-lisp/pass/password-store
/Users/dag/lib/dotfiles/emacs/lisp/completion hides /opt/homebrew/Cellar/emacs-plus <at> 27/27.2/share/emacs/27.2/lisp/completion
/Users/dag/.emacs.d/straight/build/auth-source-pass/auth-source-pass hides /opt/homebrew/Cellar/emacs-plus <at> 27/27.2/share/emacs/27.2/lisp/auth-source-pass
/Users/dag/lib/dotfiles/emacs/lisp/terminal hides /opt/homebrew/Cellar/emacs-plus <at> 27/27.2/share/emacs/27.2/lisp/obsolete/terminal

Features:
(shadow sort mailalias bbdb-message mail-extr emacsbug help-fns
radix-tree cl-print tramp-cmds noutline outline debug backtrace recentf
tree-widget magit-bookmark bookmark swiper ivy delsel ivy-faces
ivy-overlay colir 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 magit-diff smerge-mode diff git-commit log-edit pcvs-util
add-log magit-core magit-autorevert autorevert filenotify magit-margin
magit-transient magit-process magit-mode transient magit-git
magit-section magit-utils tramp-cache vc-git hober2-theme
rainbow-delimiters rainbow-mode llvm-mode tablegen-mode time so-long
quite quite-autoloads smtpmail-multi smtpmail-multi-autoloads smtpmail
sendmail exec-path-from-shell exec-path-from-shell-autoloads vlf-setup
vlf-autoloads magit-autoloads git-commit-autoloads transient-autoloads
company-graphviz-dot graphviz-dot-mode graphviz-dot-mode-autoloads hydra
lv hydra-autoloads lv-autoloads company-oddmuse company-keywords
company-etags company-gtags company-dabbrev-code company-dabbrev
company-files company-clang company-capf company-cmake company-semantic
company-template company-bbdb company company-autoloads swiper-autoloads
ivy-autoloads use-package-bind-key rainbow-mode-autoloads
rainbow-delimiters-autoloads paredit paredit-autoloads etags-select
etags-select-autoloads cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs all-the-icons
all-the-icons-faces data-material data-weathericons data-octicons
data-fileicons data-faicons data-alltheicons all-the-icons-autoloads
boxquote rect boxquote-autoloads pass imenu password-store
auth-source-pass with-editor pass-autoloads password-store-otp-autoloads
password-store-autoloads auth-source-pass-autoloads
with-editor-autoloads cmake-font-lock-autoloads cmake-mode rx rst
cmake-mode-autoloads ldap tramp-term tramp-term-autoloads advice
volatile-highlights volatile-highlights-autoloads hl-todo
hl-todo-autoloads markdown-mode-autoloads elisp-slime-nav etags fileloop
generator xref project elisp-slime-nav-autoloads ielm pp dired-x
elec-pair paren notmuch notmuch-tree notmuch-jump notmuch-hello
notmuch-show notmuch-print notmuch-crypto notmuch-mua notmuch-message
notmuch-draft notmuch-maildir-fcc notmuch-address notmuch-company
notmuch-parser notmuch-wash diff-mode coolj notmuch-query goto-addr
thingatpt icalendar diary-lib diary-loaddefs cal-menu calendar
cal-loaddefs notmuch-tag notmuch-lib notmuch-compat hl-line
notmuch-autoloads vterm face-remap color find-func vterm-module
term/xterm xterm vterm-autoloads eterm-256color pcase f dash s term
disp-table ehelp xterm-color eterm-256color-autoloads f-autoloads
dash-autoloads s-autoloads xterm-color-autoloads gnus-demon nntp
gnus-registry registry eieio-base gnus-art mm-uu mml2015 mm-view
mml-smime smime dig gnus-sum url url-proxy url-privacy url-expand
url-methods url-history mailcap shr url-cookie url-domsuf url-util svg
xml dom gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail
mail-source utf7 netrc nnoo gnus-spec gnus-win gnus-int gnus-range
message rmc puny dired dired-loaddefs rfc822 mml mml-sec epa derived epg
epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231 gmm-utils
mailheader gnus nnheader gnus-util rmail rmail-loaddefs rfc2047 rfc2045
ietf-drums text-property-search mail-utils mm-util mail-prsvr bbdb-mua
bbdb-com crm mailabbrev bbdb bbdb-site timezone bbdb-autoloads
eudcb-bbdb eudc eudc-vars edmacro kmacro tramp-sh cus-edit cus-start
cus-load wid-edit tramp tramp-loaddefs trampver tramp-integration
files-x tramp-compat shell pcomplete parse-time iso8601 time-date
ls-lisp format-spec whitespace finder-inf use-package-diminish
use-package-core server bind-key easy-mmode compile comint ansi-color
ring package browse-url url-handlers url-parse auth-source eieio
eieio-core eieio-loaddefs password-cache json map url-vars
use-package-autoloads bind-key-autoloads straight-autoloads info
cl-extra help-mode easymenu seq byte-opt straight subr-x bytecomp
byte-compile cconv cl-seq cl-macs cl gv cl-loaddefs cl-lib tooltip eldoc
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/ns-win
ns-win ucs-normalize mule-util term/common-win 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 kqueue cocoa ns
lcms2 multi-tty make-network-process emacs)

Memory information:
((conses 16 560656 69667)
 (symbols 48 35896 1)
 (strings 32 131508 11154)
 (string-bytes 1 8722894)
 (vectors 16 58823)
 (vector-slots 8 1093862 94648)
 (floats 8 823 387)
 (intervals 56 725406 8696)
 (buffers 1000 29))

[tramp-debug.txt (text/plain, attachment)]

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