Just came to report the same bug. This happens less frequently on lower render distance - I can't prove it out but I think it's happening when I have both the abovve ground loaded in and then go underground and start to see that as well. Having both seems to be too much. I have -Xmx10G allocated but it doesn't use that before it crashes. Usually about 4000 on crash. 2080 Ti, doubt it's that.
First world I was able to crash multiple times in a row was seed -1801207849904378733 at 3800, -900 (the mushroom island), 32 chunks, F3+N spectator, dive into the ground and crash, every time.
Exit code: 0
Also, I have tried waiting until all the above ground chunks are loaded and no use - still crashes. Down to 24 chunks, crashed again ... 16 chunks is slow but doesn't crash. (My computer regularly handles 1.17 32 chunks perfectly.)
Edit: I take it back, I can crash it well below 16 chunks on seed: 4370938790926065660 Method: Fly into the side of that mountain in spectator, crash every time.
I experienced this also now with a minecart. I've tried to reproduce this in a new world with no success. So I guess it's conditions created in updated worlds.
Matt A
Just came to report the same bug. This happens less frequently on lower render distance - I can't prove it out but I think it's happening when I have both the abovve ground loaded in and then go underground and start to see that as well. Having both seems to be too much. I have -Xmx10G allocated but it doesn't use that before it crashes. Usually about 4000 on crash. 2080 Ti, doubt it's that.
First world I was able to crash multiple times in a row was seed -1801207849904378733 at 3800, -900 (the mushroom island), 32 chunks, F3+N spectator, dive into the ground and crash, every time.
Exit code: 0
Also, I have tried waiting until all the above ground chunks are loaded and no use - still crashes. Down to 24 chunks, crashed again ... 16 chunks is slow but doesn't crash. (My computer regularly handles 1.17 32 chunks perfectly.)
Edit: I take it back, I can crash it well below 16 chunks on seed: 4370938790926065660 Method: Fly into the side of that mountain in spectator, crash every time.