I am getting fatal NPEs thrown by Minecraft in chunk generation when using world generation datapacks. I have had them thrown while doing initial spawn area generation on creating a new world, and on exploring a world.
I have seen similar issues (NPEs ending in "because "☃" is null" or "because "☃" is null") in the bug tracker get fixed, but I haven't seen one for cyc.a(java.util.Random) yet.
I attached my log file, and my list of data packs. My world save is too big to attach, I've put it up at https://www.dropbox.com/s/hzoa3emypfat9uh/2021-09-09_14-59-46_WilliamWithers.zip?dl=0 - this of course includes all the datapacks.
Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
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