Affects Version/s: Minecraft 1.7.4, Minecraft 1.7.5, Minecraft 1.7.9, Minecraft 14w21b, Minecraft 14w25b, Minecraft 1.7.10, Minecraft 14w28b, Minecraft 14w29a, Minecraft 14w29b, Minecraft 14w30a, Minecraft 14w30b, Minecraft 14w33c
Fix Version/s: Minecraft 1.8-pre2
Environment:Ubuntu 13.04 64-bit
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
Minecraft crashes when populating a chunk which has empty columns ("void columns"), i.e. colums with just air blocks, no bedrock, such as can for instance be generated by creating a Superflat world with preset
I have attached the crash report. I don't have access to the Minecraft source code, but using the Minecraft Coder Pack for Minecraft 1.7.2 I've traced it to the following code in BiomeDecorator.java (method func_150513_a(BiomeGenBase), lines 160-166):
It takes the height at a particular x,z coordinate and feeds the result (times two) to Random.nextInt(int). Unfortunately that method throws an exception when passed a value of zero.
One way to fix this would be to change those lines to something like:
The same would have to be done for the other loops in that method.