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The world crashes after 20-25 second i load the game.This bug was happening to me in 1.13 too.I added a picture of the world.Here is the crash log:

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Don't do that.
Time: 04.08.2018 17:33Description: Exception generating new chunk
java.util.concurrent.CompletionException: java.lang.RuntimeException: We are asking a region for a chunk out of bound | 18 -61 at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273) at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280) at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:604) at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443) at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689) at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)Caused by: java.lang.RuntimeException: We are asking a region for a chunk out of bound | 18 -61 at tj.b(SourceFile:108) at axy.y(SourceFile:42) at tj.a(SourceFile:267) at byl.a(SourceFile:50) at byo.a(SourceFile:38) at tv.a(SourceFile:21) at tr.a(SourceFile:35) at bna.a(SourceFile:95) at ty.a(SourceFile:79) at ty.a(SourceFile:25) at acu$a.a(SourceFile:147) at acu$a$$Lambda$1814/1572302132.apply(Unknown Source) at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) ... 6 more
A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Thread: Server threadStacktrace: at td.a(SourceFile:155)
-- Chunk to be generated --Details: Location: 28,-58 Position hash: -249108103140 Generator: [email protected]: at td.a(SourceFile:155) at td.a(SourceFile:120) at tl.a(SourceFile:84) at tm.c(SourceFile:123) at te.a(SourceFile:218) at net.minecraft.server.MinecraftServer.b(SourceFile:747) at net.minecraft.server.MinecraftServer.a(SourceFile:681) at dgf.a(SourceFile:131) at net.minecraft.server.MinecraftServer.run(SourceFile:584) at java.lang.Thread.run(Thread.java:745)
-- Affected level --Details: Level name: benvesurvival All players: 1 total; [tg['atakan611'/308, l='benvesurvival', x=602.73, y=96.46, z=-806.91]] Chunk stats: ServerChunkCache: 1072 Drop: 0 Level seed: 2397378607090385011 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: {} Level spawn location: World: (-168,64,244), Chunk: (at 8,4,4 in -11,15; contains blocks -176,0,240 to -161,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Level time: 10886921 game time, 4302863 day time Level dimension: 0 Level storage version: 0x04ABD - Anvil Level weather: Rain time: 81692 (now: false), thunder time: 26599 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
-- System Details --Details: Minecraft Version: 18w31a Operating System: Windows 7 (amd64) version 6.1 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 2635486176 bytes (2513 MB) / 3489660928 bytes (3328 MB) up to 4294967296 bytes (4096 MB) JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M Profiler Position: N/A (disabled) Player Count: 1 / 8; [tg['atakan611'/308, l='benvesurvival', x=602.73, y=96.46, z=-806.91]] Data Packs: vanilla Type: Integrated Server (map_client.txt) Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.