Biomes O' Plenty

Biomes O' Plenty

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Nasty bug killing world save file

uhloin opened this issue ยท 1 comments

commented

What's the issue you encountered?

Yesterday my old world stops to load. Error log (stdout) contains very long stacktrace started from:

[23:11:42] [Render thread/ERROR] [minecraft/LevelStorageSource]: Exception reading C:\Users\xen\AppData\Roaming.minecraft\saves\Dark\level.dat
java.lang.RuntimeException: Tried to read NBT tag with too high complexity, depth > 512
at net.minecraft.nbt.CompoundTag$1.m_7300_(CompoundTag.java:34) ~[client-1.19.2-20220805.130853-srg.jar%23218!/:?] {re:classloading}
at net.minecraft.nbt.CompoundTag$1.m_7300_(CompoundTag.java:30) ~[client-1.19.2-20220805.130853-srg.jar%23218!/:?] {re:classloading}

I started to search a parser for NBT-file level.dat to find what happened but could not find appropriate utility to discover a problem. As result I was forced to write parser by myself. It found "nasty nesting" in NBT with nesting depth 512 and more. Then I checked my older backup for the same world which loaded without errors. I found it also has nasty nesting but less than critical level 512.

This nesting always started from Compound tag "biomesoplenty". After thousands of tags it increased by 1 and nested tag "biomesoplenty" is started. And more and more. May be it is increased every save or some other event. Text result of parse is very big so I send you only a piece where "biomesoplenty" started and increased by +3 in loop. See strings biomesoplenty=Compound{9} ... biomesoplenty=Compound{10} ... biomesoplenty=Compound{11}

And sorry I cannot install MC 1.19.3 but my version is next from last (17.1.2.492) and probably this problem is older.
level.zip

How can the issue be reproduced?

Logs

No response

Mod Version

17.1.2.492

Additional information

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commented

I found cause of issue in other mod (Alex's mobs)