Error when replaying ASC file #1256

09:07:47  self = <can.io.asc.ASCReader object at 0x0000020898E659D0>
09:07:47  
09:07:47      def __iter__(self) -> Generator[Message, None, None]:
09:07:47          self._extract_header()
09:07:47      
09:07:47          for line in self.file:
09:07:47              line = line.strip()
09:07:47      
09:07:47              if not re.match(
09:07:47                  r"\d+\.\d+\s+(\d+\s+(\w+\s+(Tx|Rx)|ErrorFrame)|CANFD)",
09:07:47                  line,
09:07:47                  re.ASCII | re.IGNORECASE,
09:07:47              ):
09:07:47                  # line might be a comment, chip status,
09:07:47                  # J1939 message or some other unsupported event
09:07:47                  continue
09:07:47      
09:07:47              msg_kwargs: Dict[str, Union[float, bool, int]] = {}
09:07:47              try:
09:07:47                  _timestamp, channel, rest_of_message = line.split(None, 2)
09:07:47  >               timestamp = float(_timestamp) + self.start_time
09:07:47  E               AttributeError: 'ASCReader' object has no attribute 'start_time'