Exception thrown while saving oversized chunks about lithium-fabric HOT 7 CLOSED

This issue is causing chunk saving to fail in high-risk areas, such as chunks with many player-created chests or entities. Not a good situation. We need to fix the problem as soon as possible or disable the problematic patches. As far as I can tell, this issue only started occurring after the update to Minecraft 1.16.

Players can work around the problem by disabling the broken patch in their configuration file:

mixin.chunk.palette=false

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This issue is causing chunk saving to fail in high-risk areas, such as chunks with many player-created chests or entities.

Does this allow for the written book-based duplication exploit mentioned by SalC1 here?

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If anyone has instructions on how to reproduce this, or can provide a world download where the issue occurs after loading the world, please post them here.

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I will create a world with the written book exploit that I know of. I will supply the world download when finished.

Edit 1 is no longer relevant.

Edit 3: WARNING: World may be large. Please extract before putting in "saves" folder.
book dupe world.zip

Edit 4: Issue has been untested in this world.

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The issue probably isn't about "oversized" chunks but chunk sections that for some reason don't have the normal air in their palette.
I believe 202419e fixes this issue.

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The world that reproduced the issue for me (some random world that probably was upgraded from 1.16) the crash no longer occurs.

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The fix has been released with Lithium 0.5.2.

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