I set a minetweaker recipe that makes 5 water cells with 4 hydrogen cells and 1 compressed air cell in 10 ticks. The recipe works pretty well and then I added 4 overclocker upgrades and it crashed.
https://pastebin.com/HjpHG0uz
Edit : It only happens with 4 upgrades but not 3.

I will close this as this is fixed in 1.12!