Important lesson to be learned here, leaving comments is great and in the moment, they usually make sense. Many months later they may not quite make as much sense any more and time will have to be spend to figure out what was meant, all of this would have been averted with a better comment. The zero terminator in this case, I can find no evidence of it being used or relied on at any point. It does however break GTests's `EXPECT_EXIT` macro that stops looking in the output as soon as it sees the zts and doesn't end up looking at the actual assert text being thrown. Which in turn makes the`fcurve_active_keyframe`test fail when run in debug mode on windows.