Crash when constructing infinite-length UI elements

I was informed of a crash in the latest version of total-overhaul-wip which I isolated to this mod. Occasionally, it manages to construct infinitely-long health bars and causes a crash. It's a bit hard to triage as it usually just causes a massive freeze upon combat start, but the origin of the crash itself is the infinite health bar.

I have a crash.log from @SophieLovesMorrowind but no symbols were loaded, so the only thing it really managed to say was that the crash occurred in the Lua thread.