Eric Abrahamsen <eric@ericabrahamsen.net> writes:
> ANYWAY the real problem seems to have something to do with the recent
> change to the "eql" specializer for method definitions, done in
> 6535fd1fa9. That patch added quotes to eg the 'list in:
>
> (cl-defmethod map-into (map (_type (eql 'list)))
>   "Convert MAP into an alist."
>   (map-pairs map))
>
> And removing those quotes removes the error for me. Again, simply
> reloading either map.el or map.elc (with quotes still in place) also
> removes the error, so there must be something tricky going on in
> compilation. I'm cc'ing akater, the author of that patch, in hopes
> they'll have some light to shed.
>
> Eric

Curiously, for me (map-into nil 'list) is an error when run in emacs
(until redefined) but not in emacs -Q.

Still more curiously, (map-into nil 'alist) is not an error even when
(map-into nil 'list) is.

For now I can't say anything more substantial.