Perhaps what I'm doing is misguided, but it used to work before I
recently rebuilt (to master @ e1282c8c66): I open (vterm)
buffers to remote hosts, and set `default-directory` on them to be
'/sshx:<host>:.' for convenience when opening files from that buffer.

When trying to close the terminal one way or another (with debug-on-error)
I now get:

Debugger entered--Lisp error: (file-error "File ‘.’ must be absolute")
  signal(file-error ("File ‘.’ must be absolute"))
  tramp-error((tramp-file-name "sshx" nil nil "4x02" nil "." nil)
file-error "File `%s' must be absolute" ".")
  tramp-file-name-unify((tramp-file-name "sshx" nil nil "4x02" nil "." nil)
".")
  tramp-get-file-property((tramp-file-name "sshx" nil nil "4x02" nil "."
nil) "." "file-truename")
  tramp-flush-file-properties((tramp-file-name "sshx" nil nil "4x02" nil
"." nil) ".")
  tramp-flush-file-function()
  kill-buffer(#<buffer Terminal-4x02 volta@4x02 (10.0.154.60) - byobu>)
  (if (and vterm-kill-buffer-on-exit (buffer-live-p buf)) (kill-buffer buf))
  (let ((buf (process-buffer process))) (run-hook-with-args
'vterm-exit-functions (if (buffer-live-p buf) buf nil) event) (if (and
vterm-kill-buffer-on-exit (buffer-live-p buf)) (kill-buffer buf)))
  vterm--sentinel(#<process vterm> "finished\n")

And I am unable to close the buffer.



In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.20, cairo version 1.16.0) of 2022-09-07 built on jf-laptop
Repository revision: e1282c8c66f228d45b03fd7109ffe6bc7ea201a9
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.5 LTS

Configured using:
 'configure --with-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF
TOOLKIT_SCROLL_BARS X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

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

Major mode: VTerm

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  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/james/.emacs.d/elpa/dpkg-dev-el-20190824.2314/debian-autoloads hides
/home/james/.emacs.d/elpa/debian-el-20211006.1939/debian-autoloads
/home/james/.emacs.d/elpa/transient-20220717.1713/transient hides
/home/james/src/emacs/lisp/transient
/home/james/.emacs.d/my-packages/custom hides
/home/james/src/emacs/lisp/custom

Features:
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the-org-mode-expansions python-el-fgallina-expansions
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projectile-autoloads typescript-mode-autoloads compat-autoloads info
yaml-autoloads yasnippet-snippets-autoloads package browse-url url
url-proxy url-privacy url-expand url-methods url-history url-cookie
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lisp-float-type elisp-mode 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 lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine 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 emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs faces cus-face macroexp files window text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
native-compile emacs)

Memory information:
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 (symbols 48 57151 55)
 (strings 32 306661 80560)
 (string-bytes 1 11340219)
 (vectors 16 64943)
 (vector-slots 8 1166513 120164)
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 (intervals 56 3980 450)
 (buffers 1000 18))