Debugger entered--Lisp error: (wrong-type-argument stringp nil) looking-at(nil) hs-hide-block-at-point() slime-log-event((:%apply "slime-open-stream-to-lisp" (34369))) slime-dispatch-event((:%apply "slime-open-stream-to-lisp" (34369))) slime-process-available-input() slime-net-filter(# ".(:%apply \"slime-open-stream-to-lisp\" (34369))\n")