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Bug
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Resolution: Duplicate
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None
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20w18a
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None
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Confirmed
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Datafixer
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Important
The bug
Worlds that have an unknown version now show the latest version (currently 20w18a).
Opening such a world causes lots of errors to be logged and corrupts the world:
20w18a
Couldn't load chunk [-9, 23] java.lang.NullPointerException at cgo.a(SourceFile:122) at cgo$$Lambda$3404/1324669015.accept(Unknown Source) at cgu.a(SourceFile:249) at cgu$$Lambda$3406/19164340.accept(Unknown Source) at it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap$MapEntrySet.forEach(Int2IntOpenHashMap.java:927) at cgu.a(SourceFile:249) at cgo.h(SourceFile:121) at cgz.a(SourceFile:101) at yf.l(SourceFile:525) at yf$$Lambda$3328/1853807856.get(Unknown Source) at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582) at alu.c(SourceFile:144) at yr$a.c(SourceFile:540) at alu.w(SourceFile:118) at yr$a.w(SourceFile:549) at yr.d(SourceFile:280) at net.minecraft.server.MinecraftServer.bc(SourceFile:777) at net.minecraft.server.MinecraftServer.w(SourceFile:765) at alu.c(SourceFile:127) at net.minecraft.server.MinecraftServer.v(SourceFile:750) at net.minecraft.server.MinecraftServer.b(SourceFile:532) at net.minecraft.server.MinecraftServer.i_(SourceFile:372) at enx.d(SourceFile:65) at net.minecraft.server.MinecraftServer.run(SourceFile:673) at java.lang.Thread.run(Thread.java:745)
Note: It appears this does not affect worlds in the "Region file format" (before release 1.2.1).
Reproduction steps
- Start a world in any version before 1.9, or download the attached Test 1_8_9.zip
- Copy the world to the saves folder of the current version
- Open the world selection in the current version
- duplicates
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MC-181270 Trying to open old worlds (in Region format?) without version information in snapshots does not show warning screen
- Resolved