I did experiment. I wouldn't call that a safety at all.

If the bolt handle is fully lifted, it's OK, nothing happens. But the bolt will slide open all on it's own.

If the bolt handle is lifted partially or even halfway or more, when you pull the trigger, the bolt slams down and the rifle "fires". Now whether this is slow enough to prevent ignition I did not experiment with as I did not do it with a round in the chamber either.