bug#68183: 28.3; vc-dir fails when I have a certain branch checked out

[Tom Tromey]

I use vc-dir frequently.

When I check out one particular branch of my gdb repository, vc-dir
fails with this error:

vc-do-command: Failed (status 2): git --no-pager remote get-url . .

The only thing that might be peculiar about this branch is that it uses
another local branch as its tracking branch.

If I check out other branches in this repository -- ones that track
remote branches -- vc-dir works again.



In GNU Emacs 28.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.38, 
cairo version 1.17.8)
 of 2023-09-23 built on fd97b702fbea4aa3b70f5e90b3f3f165
Windowing system distributor 'The X.Org Foundation', version 11.0.12201009
System Description: Fedora Linux 38 (Workstation Edition)

Configured using:
 'configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
 --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
 --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
 --libexecdir=/usr/libexec --localstatedir=/var --runstatedir=/run
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xpm --with-x-toolkit=gtk3 --with-gpm=no
 --with-xwidgets --with-modules --with-harfbuzz --with-cairo --with-json
 --with-native-compilation build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu CC=gcc 'CFLAGS=-DMAIL_USE_LOCKF -O2
 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches
 -pipe -Wall -Werror=format-security
 -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS
 -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
 -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection
 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer '
 LDFLAGS=-Wl,-z,relro
 PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'

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

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

Major mode: Compilation

Minor modes in effect:
  shell-dirtrack-mode: t
  which-function-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  savehist-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-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
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 
/usr/share/emacs/28.3/lisp/play/bubbles
/home/tromey/.emacs.d/elpa/dictionary-1.10/dictionary hides 
/usr/share/emacs/28.3/lisp/net/dictionary

Features:
(shadow emacsbug markdown-mode tcl m4-mode gud novice pcmpl-unix
pcmpl-gnu two-column url-http url-gw url-auth sh-script smie executable
dired-aux rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid rng-loc
rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn nxml-ns
nxml-mode nxml-outln nxml-rap sgml-mode facemenu nxml-util nxml-enc
xmltok autoconf autoconf-mode gnus-html help-fns radix-tree url-cache
org-bullets org-element avl-tree ol-eww eww xdg url-queue mm-url
ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect gnus-search eieio-opt
speedbar ezimage dframe ol-docview doc-view image-mode exif ol-bibtex
ol-bbdb ol-w3m ol-doi org-link-doi 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 noutline outline org-version
ob-emacs-lisp ob-core ob-eval org-table oc-basic bibtex ol org-keys oc
org-compat org-macs org-loaddefs find-func flow-fill python tramp-sh
term/xterm xterm face-remap goto-addr log-edit vc-annotate mule-util
jka-compr find-dired texinfo texinfo-loaddefs find-file make-mode
log-view pcvs-util vc-mtn vc-hg vc-bzr vc-src vc-sccs vc-svn vc-cvs
vc-rcs copyright pulse ffap scheme mailalias dabbrev supercite regi
mail-hist ggtags hippie-exp etags fileloop generator xref project
bug-reference vc-git cc-mode cc-fonts cc-guess cc-menus cc-cmds
smerge-mode diff diff-mode shr-color mm-archive sort smiley gnus-cite
mail-extr qp gnus-async gnus-bcklg gnus-ml disp-table misearch
multi-isearch gnus-topic nndraft nnmh nnfolder utf-7 gnutls
network-stream nsm gnus-agent gnus-srvr gnus-score score-mode nnvirtual
gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime dig nntp
gnus-cache gnus-sum shr kinsoku svg dom gnus-group gnus-undo smtpmail
sendmail gnus-start gnus-dbus dbus gnus-cloud nnimap nnmail mail-source
utf7 netrc nnoo gnus-spec gnus-int gnus-range message rmc puny dired
dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader gnus-win gnus nnheader gnus-util rmail rmail-loaddefs rfc2047
rfc2045 ietf-drums mail-utils mm-util mail-prsvr add-log flyspell ispell
diminish projectile ibuf-macs pcase edmacro kmacro grep compile
text-property-search ibuf-ext ibuffer ibuffer-loaddefs dash appt
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs tramp
tramp-loaddefs trampver tramp-integration files-x tramp-compat shell
pcomplete parse-time ls-lisp which-func imenu minimap autorevert
filenotify cus-load erc-track erc-match erc-services erc-networks
erc-hl-nicks easy-mmode color erc-button erc-fill erc-stamp wid-edit
erc-goodies erc erc-backend iso8601 time-date thingatpt pp format-spec
erc-loaddefs comp comp-cstr rx cl-extra help-mode warnings advice vc-dir
ewoc vc vc-dispatcher cc-styles cc-align cc-engine cc-vars cc-defs
ange-ftp comint ansi-color ring server savehist clang-rename
clang-include-fixer let-alist clang-format xml finder-inf
gdb-shell-autoloads lisppaste-autoloads pydoc-info-autoloads info-look
info cl weblogger-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
mailcap 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 iso-transl
tooltip eldoc paren electric uniquify ediff-hook vc-hooks
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 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 emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads
xwidget-internal dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty
make-network-process native-compile emacs)

Memory information:
((conses 16 2511390 280777)
 (symbols 48 68379 41)
 (strings 32 200925 47137)
 (string-bytes 1 9410331)
 (vectors 16 109364)
 (vector-slots 8 3054321 332806)
 (floats 8 532 632)
 (intervals 56 469509 4701)
 (buffers 992 1022))