Nothing, leaving you wondering WTF.
An extremely helpful console message: “SPANK! SPANK! SPANK! Naughty programmer!”. Really, I’m not joking about that one.
Another extremely helpful message: “You bitch!”. And I’m not joking about that one either – it was discovered by a female coworker while trying to hack layouts to work. Perfect timing on EFL side here.
A crash, if you’re lucky, so you can debug the issue.