The value NIL is not of the expected type ARRAY.

   [Condition of type TYPE-ERROR]

Restarts:

 0: [*ABORT] Return to SLIME's top level.

 1: [ABORT-BREAK] Reset this thread

 2: [ABORT] Kill this thread

Backtrace:

  0: (CCL::ARRAY-DATA-AND-OFFSET NIL)

  1: (MAKE-STRING-INPUT-STREAM NIL 0 0)

  2: (READ-FROM-STRING NIL T NIL :START 0 :END NIL :PRESERVE-WHITESPACE NIL)

  3: ((:INTERNAL SWANK::FROM-STRING))