Cons less, be more careful about always using the environment, #'macroexpand 2011-12-30 Aidan Kehoe <kehoea@parhasard.net> * eval.c (Fmacroexpand): Don't cons if ENVIRONMENT is the same object as byte-compile-macro-environment. Always look up symbol- and other macros in the (possibly modified) byte-compile-macro-environment, not the supplied ENVIRONMENT. byte-compile-macro-environment reflects ENVIRONMENT, so that's OK and preferred.