Your bug report

#27726: 26.0.50; plist functions give confusing errors on invalid plists

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 27726@debbugs.gnu.org.

-- 
27726: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=27726
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems