[MC-249933] Game crash related to the frog occurred (Accessing LegacyRandomSource from multiple threads)

The bug
I was just exploring my snapshot world and went to a Mangrove swamp and the game kept freezing and continuing and then froze and crash. I have the crash report in the attachments.

I looked into it and noticed this crash was from the frog entity.

Attachments

crash-2022-04-06_15.06.03-server.txt

crash-2022-04-06_17.12.59-server.txt

crash-2022-04-06_17.51.59-server.txt

crash-2022-04-08_04.51.21-server.txt

crash-2022-04-09_22.22.46-server.txt

deobf_crash-2022-04-06_15.06.03-server.txt

deobf_crash-2022-04-06_17.12.59-server.txt

deobf_crash-2022-04-06_17.51.59-server.txt

deobf_crash-2022-04-09_22.22.46-server.txt

KirvenAvion_crash-2022-04-08_02.16.19-server.txt

latest.log

Comments 6

skyrising 2022-04-06T17:13:27Z

I also had a similar crash with the relevant line being

at aej.a(SourceFile:453) -> ServerLevel.tickChunks

Seems like the ServerLevel.random is the instance accessed from multiple threads.

Caden Kriese 2022-04-06T20:28:38Z

I have also experienced this; I've added my crash log.

bdm68 2022-04-06T22:22:48Z

I experienced this crash while exploring a large mangrove swamp in creative mode.
World seed: -6130920181816870746
Player location at crash: x=-1561.32, y=158.74, z=-844.11
Chunk to be generated: -112,-39 (-1792, -624)

Maksom4ik 2022-04-07T17:20:50Z

I have an image from launcher after crash

[media]

KirbAvion 2022-04-08T06:23:56Z

I got hit with this in the middle of a freshly-generated Ice Spikes biome with no frogs or swamps around that I'm aware of, save for one that I left hanging around my spawnpoint several kilometers away. The chunk referenced in the crash report (484, 41) is on the edge of a mountain biome.

It's probably redundant at this point but I'll see if I can attach my crash report for good measure.

likalaruku 2022-04-10T05:25:48Z

Getting this only with newly generated worlds. Old maps from prior snapshots are not crashing.

More prone to crashing in the Nether.