Your bug report

#8631: since lexical merge, byte compiler does not know defmethod defines a function

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 8631@debbugs.gnu.org.

-- 
8631: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8631
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