I'm not certain if this test failure is a bug in Emacs or a problem with my build.
After building Emacs 30.0.91 from the tarball with $ ./configure $ make -j and then running $ make test I get the following test results: SUMMARY OF TEST RESULTS ----------------------- Files examined: 519 Ran 7898 tests, 7661 results as expected, 1 unexpected, 236 skipped 1 files contained unexpected results: lisp/uniquify-tests.log The details of the failed test are: ELC+ELN lisp/uniquify-tests.elc GEN lisp/uniquify-tests.log Running 7 tests (2024-09-12 12:30:54-0400, selector `(not (or (tag :expensive-test) (tag :unstable)))') passed 1/7 uniquify-basic (0.049446 sec) passed 2/7 uniquify-dirs (0.052217 sec) Test uniquify-project-transform backtrace: signal(ert-test-failed (((should (equal (mapcar #'buffer-name bufs) ert-fail(((should (equal (mapcar #'buffer-name bufs) '("README<other #f(compiled-function () #<bytecode 0x1832166822f8ac0c>)() #f(compiled-function () #<bytecode -0xd7b405b6433f139>)() handler-bind-1(#f(compiled-function () #<bytecode -0xd7b405b6433f139 ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test ert-run-test(#s(ert-test :name uniquify-project-transform :documenta ert-run-or-rerun-test(#s(ert--stats :selector (not (or ... ...)) :te ert-run-tests((not (or (tag :expensive-test) (tag :unstable))) #f(co ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstable))) ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (tag :un eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-test) ( command-line-1(("-L" ":." "-l" "ert" "--eval" "(setq treesit-extra-l command-line() normal-top-level() Test uniquify-project-transform condition: (ert-test-failed ((should (equal (mapcar ... bufs) '("README<other>" "README<bar>"))) :form (equal ("README<other>" "README<emacs-30.0.91>") ("README<other>" "README<bar>")) :value nil :explanation (list-elt 1 (arrays-of-different-length 21 11 "README<emacs-30.0.91>" "README<bar>" first-mismatch-at 7)))) FAILED 3/7 uniquify-project-transform (0.042755 sec) at lisp/uniquify-tests.el:130 passed 4/7 uniquify-rename-to-dir (0.000854 sec) passed 5/7 uniquify-separator-ignored (0.007538 sec) passed 6/7 uniquify-separator-style-reverse (0.007087 sec) passed 7/7 uniquify-space-prefix (0.007681 sec) Ran 7 tests, 6 results as expected, 1 unexpected (2024-09-12 12:30:55-0400, 0.310196 sec) 1 unexpected results: FAILED uniquify-project-transform --- In GNU Emacs 30.0.91 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) of 2024-09-12 built on fedora Windowing system distributor 'The X.Org Foundation', version 11.0.12014000 System Description: Fedora Linux 39 (Xfce) Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $LANG: en_CA.utf8 value of $XMODIFIERS: @im=none locale-coding-system: utf-8-unix Major mode: Text Minor modes in effect: flyspell-mode: t recentf-mode: t erc-track-mode: t erc-ring-mode: t erc-notifications-mode: t erc-netsplit-mode: t erc-menu-mode: t erc-match-mode: t erc-list-mode: t erc-irccontrols-mode: t erc-noncommands-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-autojoin-mode: t yas-global-mode: t yas-minor-mode: t savehist-mode: t save-place-mode: t erc-networks-mode: t electric-pair-mode: t display-time-mode: t display-battery-mode: t desktop-save-mode: t delete-selection-mode: t cua-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 blink-cursor-mode: t minibuffer-regexp-mode: t size-indication-mode: t column-number-mode: t line-number-mode: t global-visual-line-mode: t visual-line-mode: t transient-mark-mode: t auto-encryption-mode: t auto-compression-mode: t temp-buffer-resize-mode: t abbrev-mode: t Load-path shadows: None found. Features: (shadow sort bbdb-message display-fill-column-indicator mail-extr compile emacsbug message yank-media puny dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util text-property-search mm-decode mm-bodies mm-encode mail-parse rfc2231 gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils comp-run comp-common flyspell ispell vc-git diff-mode track-changes easy-mmode vc-dispatcher warnings thingatpt find-func org-version org-compat org-macs bbdb-anniv diary-lib diary-loaddefs cal-menu calendar cal-loaddefs bbdb-com crm mailabbrev bbdb bbdb-site timezone recentf tree-widget cus-edit pp ido erc-track erc-ring erc-desktop-notifications notifications erc-netsplit erc-menu erc-match erc-list erc-goodies erc-pcomplete time-date pcomplete comint ansi-osc ansi-color ring erc-button erc-fill erc-stamp wid-edit erc-join modus-vivendi-theme modus-themes yasnippet-classic-snippets cl-extra yasnippet help-mode savehist saveplace company pcase erc format-spec erc-backend erc-networks erc-common erc-compat compat erc-loaddefs elec-pair time battery dbus xml desktop frameset delsel cua-base cus-load ace-window-autoloads auctex-autoloads tex-site avy-autoloads bbdb-autoloads company-autoloads csv-mode-autoloads debbugs-autoloads ess-autoloads expand-region-autoloads geiser-autoloads info orderless-autoloads rx sql-indent-autoloads yasnippet-autoloads package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs icons password-cache json subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd touch-screen 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 theme-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 dynamic-setting system-font-setting font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 367258 57019) (symbols 48 25731 0) (strings 32 98142 5367) (string-bytes 1 2981083) (vectors 16 37711) (vector-slots 8 466767 27508) (floats 8 195 125) (intervals 56 555 107) (buffers 984 13))