Dr. Arne Babenhauserheide schreef op do 01-07-2021 om 13:44 [+0200]: > Maxime Devos writes: > > scheme@(guile-user)> (null?) > > ;;; :1:0: warning: possibly wrong number of arguments to `null?' > > This is a correct warning: null? requires an argument (the list to check > for emptyness). The path forward from here is to find out why null? does > not receive an argument. Yes, the warning is correct. I wasn't referring to the warning, but to the compile error. scheme@(guile-user)> (null?) ;;; [the warning] While compiling expression: Wrong number of arguments to # ^^^ this error Greetings, Maxime.