Your bug report

#40254: 26.1; sgml-mode: Match data clobbered by buffer modification hooks

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 40254@debbugs.gnu.org.

-- 
40254: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40254
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems