The attached file contains the string "end--" in two places. When searching for that string with M-x isearch-forward (C-s) in that file, just after opening the file, starting from the top of the file, it often happens, that after positioning the cursor at the first "end" in the file, it displays "end-" on the mode line and then goes into an infinite loop, not responding to further input or making any further progress on the search. In GNU Emacs 28.1 (build 1, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G95)) of 2022-04-22 built on builder10-14.lan Windowing system distributor 'Apple', version 10.3.2113 System Description: macOS 12.3 Configured using: 'configure --with-ns '--enable-locallisppath=/Library/Application Support/Emacs/${version}/site-lisp:/Library/Application Support/Emacs/site-lisp' --with-modules' Configured features: ACL GMP GNUTLS JSON LIBXML2 MODULES NOTIFY KQUEUE NS PDUMPER THREADS TOOLKIT_SCROLL_BARS ZLIB Important settings: value of $EMACSLOADPATH: /Applications/LilyPond.app/Contents/Resources/share/emacs/site-lisp:/Users/dan/local/share/emacs/site-lisp:/usr/local/share/emacs/site-lisp: value of $LC_ALL: en_US.UTF-8 value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: Info Minor modes in effect: global-edit-server-edit-mode: t icomplete-mode: t global-auto-revert-mode: t auto-image-file-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 temp-buffer-resize-mode: t buffer-read-only: t line-number-mode: t indent-tabs-mode: t transient-mark-mode: t Load-path shadows: /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-symbols hides /Applications/Macaulay2-1.20/share/emacs/site-lisp/macaulay2/M2-symbols /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2 hides /Applications/Macaulay2-1.20/share/emacs/site-lisp/macaulay2/M2 /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-init hides /Applications/Macaulay2-1.20/share/emacs/site-lisp/macaulay2/M2-init /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-mode hides /Applications/Macaulay2-1.20/share/emacs/site-lisp/macaulay2/M2-mode /Users/dan/emacs/gedcom hides /Users/dan/home/emacs/gedcom /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-symbols hides /usr/local/share/emacs/site-lisp/macaulay2/M2-symbols /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2 hides /usr/local/share/emacs/site-lisp/macaulay2/M2 /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-init hides /usr/local/share/emacs/site-lisp/macaulay2/M2-init /Users/dan/src/M2/M2.git/M2/Macaulay2/editors/emacs/M2-mode hides /usr/local/share/emacs/site-lisp/macaulay2/M2-mode /Users/dan/emacs/rmail hides /Applications/Emacs.app/Contents/Resources/lisp/mail/rmail /Users/dan/home/emacs/longlines hides /Applications/Emacs.app/Contents/Resources/lisp/obsolete/longlines Features: (shadow sort mail-extr warnings emacsbug message rmc puny rfc822 mml mml-sec epa epg rfc6068 epg-config gnus-util rmail mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils thai-util thai-word lao-util enriched facemenu view vc-git diff-mode vc-dispatcher M2 M2-symbols rx jka-compr dired-aux dired dired-loaddefs misearch multi-isearch eieio-opt cl-extra speedbar ezimage dframe find-func shortdoc thingatpt help-fns radix-tree tabify imenu man agda2-mode pcase derived agda2-queue agda2-abbrevs skeleton agda2-highlight agda2 annotation eri time-date pp agda-input quail help-mode edit-server easy-mmode edmacro kmacro server generic disp-table cc-styles cc-align cc-engine cc-vars cc-defs icomplete grep compile text-property-search comint ansi-color ring autorevert filenotify image-file image-converter cus-load info proof-site proof-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/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 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 kqueue cocoa ns multi-tty make-network-process emacs) Memory information: ((conses 16 299140 12614) (symbols 48 14179 3) (strings 32 50438 2510) (string-bytes 1 1513842) (vectors 16 26190) (vector-slots 8 305278 27939) (floats 8 93 32) (intervals 56 7639 129) (buffers 992 27))