Recent changes in the isearch package has made packages that customize isearch fail. Case 1: change-log-mode customizes isearch so that you could search multiple files. Emacs -Q lisp/ChangeLog C-s refresh-d C-s C-a Here, the symbol "font-lock-refresh-defaults" in ChangeLog.16 has been found. C-a typically exits isearch, however, now it doesn't. You can see this on the fact that the isearch highlight is still active and when more characters are typed, they are added to the search string. This broke on revision 114586. Log for revision 114586: fixes bug: http://debbugs.gnu.org/15200 committer: Juri Linkov branch nick: trunk timestamp: Wed 2013-10-09 02:20:12 +0300 message: * lisp/isearch.el (isearch-help-map, isearch-mode-map): Don't bind [t] to isearch-other-control-char. (isearch-mode): Add isearch-pre-command-hook to pre-command-hook and isearch-post-command-hook to post-command-hook. (isearch-done): Remove isearch-pre-command-hook from pre-command-hook and isearch-post-command-hook from post-command-hook. (isearch-unread-key-sequence) (isearch-reread-key-sequence-naturally) (isearch-lookup-scroll-key, isearch-other-control-char) (isearch-other-meta-char): Remove functions. (isearch-pre-command-hook, isearch-post-command-hook): New functions based on isearch-other-meta-char rewritten relying on the new behavior of overriding-terminal-local-map that does not replace the local keymaps any more. Case 2: isearch in the popular third-part package "folding" is broken, same symptoms as above. (If you don't have it I can supply a copy.) ./nextstep/Emacs.app/Contents/MacOS/Emacs -Q folding.el -l folding.el y M-x folding-mode RET C-s defvar C-a This broke in revision 114633. Log for 114633: committer: Stefan Monnier branch nick: trunk timestamp: Fri 2013-10-11 21:10:25 -0400 message: * lisp/isearch.el (isearch-pre-command-hook): Don't build in knowledge about internals of universal-argument. -- Anders Lindgren In GNU Emacs 24.3.50.1 (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00) of 2013-12-03 on macpro.lan Bzr revision: 115300 rgm@gnu.org-20131130084228-ifjblwsxjxkeeta7 Windowing system distributor `Apple', version 10.3.1265 Configured using: `configure --with-ns' Important settings: value of $LC_CTYPE: UTF-8 locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Change Log Minor modes in effect: bug-reference-mode: t tooltip-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: C-s r e f r e s h - d C-s C-a d C-g C-g C-g C-h v e m a c z - b s - b z C-x 1 Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Quit [2 times] Type C-x 1 to delete the help window. Load-path shadows: None found. Features: (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils help-mode easymenu help-fns misearch multi-isearch vc-bzr bug-reference add-log time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer 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 make-network-process cocoa ns multi-tty emacs)