[MC-236755] "Feature Placement" Crash / java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0

Traveling east at -1900 x / 90 y / -5670 on seed -1571165624 , you reach a point just over the mountain where the game crashes for some reason. The first times I got the crash, it was due to a 'Feature Placement'. One time while revisiting the area, the crash was due to a "Exception in server tick loop". I've also had crashes where the screen just goes grey, like the game is trying to crash, but can't. I'm attaching crash reports as well.

Linked issues

is duplicated by 3

MC-237219 java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 Resolved

MC-237237 World Crashes at Specific area in seed Resolved

MC-237673 The game crashed whilst feature placement Resolved

Attachments

crash-2021-09-15_16.53.26-server.txt

crash-2021-09-15_16.54.18-server.txt

crash-2021-09-15_23.12.05-server.txt

crash-2021-09-17_19.52.27-server.txt

crash-2021-09-17_19.57.15-server.txt

deobf_crash-2021-09-15_16.53.26-server.txt

deobf_crash-2021-09-15_16.54.18-server.txt

deobf_crash-2021-09-15_23.12.05-server.txt

deobf_crash-2021-09-17_19.52.27-server.txt

deobf_crash-2021-09-17_19.57.15-server.txt

Comments 3

Nassim Jahnke 2021-09-16T19:59:24Z

I can confirm I had the same exact crash after just flying around a newly generated 21w37a world

Patrick J Love 2021-09-18T02:08:47Z

Same crash here. Was exploring a seed in 21w37a when the game crashed with this error. Appears to be occurring in world gen for minecraft:flower_meadow if I am reading the report correctly. The crash was repeatable, as logging into the world again and regenerating the same chunks caused the same crash. I've attached my two crash logs as well:

[media][media]

Fannic64 2021-09-26T09:57:29Z

This issue probably happens because the game tries to load a chunk that spawns blocks above Y=256, some CPU processors are unable to process this correctly, which will result in a crash. But we are right, this did not happen before terrain generation change, which is 1.17.1.