The bug

20w17a, Mojang names

The methods net.minecraft.util.Mth.ceil(float) and ceil(double) are supposed to return the smallest int which is equal or greater than the given float / double.
The problem is that if the argument is > Integer.MAX_VALUE, the result overflows and becomes Integer.MIN_VALUE.

Maybe that is acceptable though because usually these methods are not called with such high values.