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Bug
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Resolution: Fixed
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21w43a
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None
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Confirmed
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Custom Worlds
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Important
The bug
If you open this custom world 21w42a-height4064.json
in 21w43a after you generated it in 21w42a results in all terrain below -64 disappearing and any blocks being placed above 320 / max_y.
How to reproduce
- Open Minecraft in 21w42a
- Create a world using the custom world settings in 21w42a-height4064.json
Enter spectator mode, and observe that the world bottom is lower than Y=-64 and world top is higher than Y=320 (e.g. by placing a block above it)
- Open Minecraft in 21w43a
- Play the world you created previously to upgrade it
The terrain previously generated below Y=-64 has been removed, and the bottom of the world is now found at Y=-64.
Blocks above Y=320 are removed, and the top of the world is now found at Y=320
Expected behaviour
- The upgraded world would not have all terrain below Y=-64 and above Y=320 removed, the dimension's bounding boxes / min_y and height should stay unchanged.
Error
Couldn't load chunk [11, -4] java.lang.ArrayIndexOutOfBoundsException: Index 58 out of bounds for length 24 at cow.a(SourceFile:350) at cow.a(SourceFile:290) at cps.a(SourceFile:202) at abu.m(SourceFile:579) at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1764) at atg.c(SourceFile:151) at acf$b.c(SourceFile:534) at atg.y(SourceFile:125) at acf$b.y(SourceFile:543) at acf.d(SourceFile:278) at net.minecraft.server.MinecraftServer.be(SourceFile:763) at net.minecraft.server.MinecraftServer.y(SourceFile:751) at atg.c(SourceFile:134) at net.minecraft.server.MinecraftServer.x(SourceFile:736) at net.minecraft.server.MinecraftServer.b(SourceFile:497) at net.minecraft.server.MinecraftServer.f_(SourceFile:329) at fcg.e(SourceFile:72) at net.minecraft.server.MinecraftServer.w(SourceFile:655) at net.minecraft.server.MinecraftServer.a(SourceFile:269) at java.base/java.lang.Thread.run(Thread.java:831)
