Your bug report

#55635: `make-decoded-time' incorrectly sets DST to nil, it should be -1 (guess)

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 55635@debbugs.gnu.org.

-- 
55635: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=55635
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems