This is fixed by git commit 1440dbed544a76ee3b876cb573b5110211e798bb. ________________________________ From: GNU bug Tracking System Sent: 29 March 2021 02:55 To: David Welch Subject: bug#47457: Acknowledgement (28.0.50; Infinite loop in cc-mode/isearch) Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. Your message has been sent to the package maintainer(s): bug-gnu-emacs@gnu.org If you wish to submit further information on this problem, please send it to 47457@debbugs.gnu.org. Please do not send mail to help-debbugs@gnu.org unless you wish to report a problem with the Bug-tracking system. -- 47457: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=47457 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems