The log and the crash report can be found here: mezz/JustEnoughItems#2546

Everything's not tested. I open the issue here only because of LoliASM being the most sussy one among all mods updated after the latest successful launch.

Edit: Okay I just tried getting back to 3.3, the latest version before that huge JEI-related update, the game booted and now it's guaranteed. So it's only on my end or..?

"sussy", what are you a 12 year old?

And, it's probably a JustEnoughCharacters incompatibility.

Removed JEC, the game successfully booted.
So should I issue this on the suspectus JEC side?

No, I assumed they just made a weird implementation, which they did, so the next commit should explicitly fix this.

Going to reopen, redoing JEI optimizations.

Closed in c2d3b77, moving JEI optimization to another mod.