I'm running emacs + slime + sbcl on an iMac High Sierra version 10.13.6. When I evaluate (format t "This is a test ~%) in the slime-repl sbcl, sbcl simply returns nil without printing the output. Can anyone tell me what I'm doing wrong?
Removed tag emacs, though you are using Emacs, because the format you're asking about is (presumably) Common Lisp format and not Elisp format. (The latter does not have a destination first arg.)
did you check the "inferior-lisp" buffer (there are additional asterisks around the name but I can't write them in this comment box); or maybe if you started lisp in a terminal and connected to it, if that's printed in that terminal ?
emacs, though you are using Emacs, because theformatyou're asking about is (presumably) Common Lispformatand not Elispformat. (The latter does not have a destination first arg.)