def _rollback(self):
last_pc, last_gas, last_instruction, last_arguments, fee, allocated = self._checkpoint_data<EOL>self._push_arguments(last_arguments)<EOL>self._gas = last_gas<EOL>self._pc = last_pc<EOL>self._allocated = allocated<EOL>self._checkpoint_data = None<EOL>
Revert the stack, gas, pc and memory allocation so it looks like before executing the instruction