code: func opcodeReserved(op *parsedOpcode, vm *Engine) error {
  	str := fmt.Sprintf("attempt to execute reserved opcode %s",
  		op.opcode.name)
  	return scriptError(ErrReservedOpcode, str)
  }
docs: // opcodeReserved is a common handler for all reserved opcodes.  It returns an
  // appropriate error indicating the opcode is reserved.