Your bug report

#13316: 24.2.50; defmacro might not return the last form, if it is nil

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 13316@debbugs.gnu.org.

-- 
13316: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13316
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems