Slime Version: 3/10 from git mirror of CVS SBCL 1.0.36 GNU Emacs 22.1.1 and 23.x.x (checked on two different versions). Using the latest version of slime, executing the following code in the slime repl results in a totally locked lisp that can't be quit or interacted with via slime. There is also nothing of interest in the backing SBCL terminal. (make-package :short-name) (make-package :long-name :nicknames (list :short-name)) Executing these same forms in the sbcl command line repl correctly results in a debugger asking for me to abort being stupid. The last slime event we see is: (:emacs-rex (swank:listener-eval "(make-package :long-name :nicknames (list :short-name))\n") "COMMON-LISP-USER" :repl-thread 6) This is my setup: (slime-setup '(slime-fancy slime-asdf slime-tramp slime-indentation)) Thanks for the great software, SLIME is a pleasure to use, Russ Tyndall