code: func opcodeCodeSeparator(op *parsedOpcode, vm *Engine) error {
  	vm.lastCodeSep = vm.scriptOff
  	return nil
  }
docs: // opcodeCodeSeparator stores the current script offset as the most recently
  // seen OP_CODESEPARATOR which is used during signature checking.
  //
  // This opcode does not change the contents of the data stack.