defgeneric problem

(sorry, the welcome line was well out of the scroll buffer)

[tschichold:/Applications/ccl] janson% ./scripts/openmcl
Welcome to OpenMCL Version (Beta: Darwin) 0.13.3!
? (defGeneric initialize-clone (node clone)
   (:documentation
    "copy slot values from one node to another.
     slots with bound values are left unchanged in order to permit 
previous initarg based
     initialization (see clone-instance), which can then avoid unwanted 
deep cloning.")
   (:method-combination progn :most-specific-first)
   (:method progn ((from standard-object) (to standard-object))))
 > Error: Stack overflow on value stack.
 > While executing: CCL::CPL-INDEX
 > Type :POP to abort.
Type :? for other options.
1 >