I don't see why there is so much discussion about a workaround.
In my view if there is a flag -q or --quiet there should be no need to redirect output to /dev/null but anacron should really be quiet. Point!
So I think it is a bug if anacron -q exhibits a message about not starting a second instance, which even is not really an error but more a warning.
And if a --quiet option makes any sense at all it should be quiet about warnings.
I don't see why there is so much discussion about a workaround.
In my view if there is a flag -q or --quiet there should be no need to redirect output to /dev/null but anacron should really be quiet. Point!
So I think it is a bug if anacron -q exhibits a message about not starting a second instance, which even is not really an error but more a warning.
And if a --quiet option makes any sense at all it should be quiet about warnings.