Piggybacking that: "What's your least favorite feature of <language X> and why?" Where <language X> is obviously part of the tech stack that you're hiring for

Piggybacking that: "What's your least favorite feature of <language X> and why?" Where <language X> is obviously part of the tech stack that you're hiring for. You can tool the depth you're looking for in a response based on the level you're hiring for as well on this. Don't even get me started on the GIL in python...