"Matthew D. Swank" akopa@charter.net writes:
Propertize is not in emacs 20.x, but set-text-properties is. Attached is a patch the replaces the only reference to propertize in slime.el.
In cases like this where the string is being propertized for insertion into the buffer you can also use `slime-insert-propertized'.
See also `slime-propertize-region' which isn't what you think..