live trader error when resampling.

[Li Mike]

Hi, I am runing a live paper trade.
I accept ticks data and add it to cerebro, and resample to 10s bars in backtrader.
I get an error：
File "e:\myquant\venv_quant389\lib\site-packages\backtrader\cerebro.py", line 1591, in _runnext
dt0 = min((d for i, d in enumerate(dts) if d is not None and i not in rsonly))
ValueError: min() arg is an empty sequence

I did some debug and find that the problem comes from the following snippet.

In Cerebro's _runnext method, there is a snippet as follows.

            if d0ret:
                dts = []
                for i, ret in enumerate(drets):
                    dts.append(datas[i].datetime[0] if ret else None)

                # Get index to minimum datetime
                if onlyresample or noresample:
                    dt0 = min((d for d in dts if d is not None))
                else:
                    dt0 = min((d for i, d in enumerate(dts)
                               if d is not None and i not in rsonly))

dt0 = min((d for i, d in enumerate(dts)
if d is not None and i not in rsonly))
this statement got 'min() arg is an empty sequence' error.
I think when sometime there is no tick, the err ocurs.

How to fix this problem?
Thanks in advance.