[O] bug in lisp code blocks

[Mark Scala]

Greetings.

This is probably a bug:

#+BEGIN_SRC lisp :results output
  (format t "Hello world.")
  ;; comment after, causes crash when block is evaluated with C-c C-c
#+END_SRC

Debugger message:
#+BEGIN_QUOTE
end of file on #<SB-IMPL::STRING-INPUT-STREAM {1003F862D3}>
   [Condition of type END-OF-FILE]
#+END_QUOTE

org-version: Org-mode version 8.3beta (release_8.3beta-51-g02f2d5 @
/home/mark/opt/org-mode/lisp)