output-stream-sequence-length

flexi-streams-1.0.7

The simple-array type declaration in output-stream-sequence-length is 
wrong because the vector has fill-pointer and adjustable.

(defmethod output-stream-sequence-length ((stream in-memory-output-stream))
   (declare (optimize speed))
   (with-accessors ((vector vector-stream-vector))
       stream
     (length (the (simple-array * (*)) vector))))

regards,
T.