func is_valid crashed when checking '*/0 * * * *' cron string

[yitian-reevo]

Hi guys.

Accidentally found an issue when using is_valid func with parameter '*/0 * * * *', the expect return is False, while somehow the program crashed.

I actually located where the problem is, it's in croniter.py Line 499. m.group(4) or 1 failed to return 1 when m.group(4) == '0', which then further caused variable step became 0, then it crashed.

Could you please fix this?

[kiorky]

Uhm, i need to investigate but your cron line seems invalid for me, so at least its normal that it wont work.

*/0 mean each 0 minutes, division by zero !

[yitian-reevo]

As a programmer, I totally understand this cron line is invalid, and stupid! But we cannot control that somebody attempts to do this to let their jobs run continually.

Thanks for working on this!

[kiorky]

Ok, no problemo, as i said i ll look how to make croniter not crash.
I wanted just to be clear on the invalidness of the expression.
thx for reporting !

[kiorky]

https://pypi.org/project/croniter/0.3.27/ is out

[yitian-reevo]

Fabulous! Thanks.

[kiorky]

Better later than never ^^ :).