So I was working in emacs and the suddenly, the slime-repl sbcl says text is read only. Well that\'s great because now I can\'t type anything into it. How do I fix?
I solved this by first opening two frames, one with a .lisp file opened and the other with the slime-repl.
From the frame with the .lisp file, I applied C-c C-j on a line of code (e.g (+ 1 2)).
This copied the line of code down to the slime-repl and evaluated it.
This also somehow solved the problem with the "text is read only" problem.