---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 7/9/21, 10:27 PM
Description: Batching chunks

java.util.ConcurrentModificationException
	at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1584)
	at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1607)
	at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:335)
	at java.base/java.util.HashSet.<init>(HashSet.java:121)
	at com.google.common.collect.Sets.newHashSet(Sets.java:273)
	at epx$c.a(SourceFile:401)
	at epx$c$b.a(SourceFile:448)
	at epx.a(SourceFile:132)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1806)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
	at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1584)
	at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1607)
	at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:335)
	at java.base/java.util.HashSet.<init>(HashSet.java:121)

-- Affected level --
Details:
	All players: 1 total; [emm['blublu_owns123'/228, l='ClientLevel', x=1781.94, y=20.00, z=682.69]]
	Chunk stats: 3969, 3311
	Level dimension: minecraft:overworld
	Level spawn location: World: (1260,4,549), Section: (at 12,4,5 in 78,0,34; chunk contains blocks 1248,0,544 to 1263,255,559), Region: (2,1; contains chunks 64,32 to 95,63, blocks 1024,0,512 to 1535,255,1023)
	Level time: 83817123 game time, 6000 day time
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at eji.a(SourceFile:370)
	at dvp.c(SourceFile:2399)
	at epx.a(SourceFile:136)
	at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859)
	at java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:837)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1806)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

-- Last reload --
Details:
	Reload number: 1
	Reload reason: initial
	Finished: Yes
	Packs: Default

-- System Details --
Details:
	Minecraft Version: 1.17.1
	Minecraft Version ID: 1.17.1
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 16.0.1, Microsoft
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
	Memory: 796768264 bytes (759 MiB) / 2147483648 bytes (2048 MiB) up to 2147483648 bytes (2048 MiB)
	CPUs: 8
	Processor Vendor: GenuineIntel
	Processor Name: Intel(R) Core(TM) i7-7740X CPU @ 4.30GHz
	Identifier: Intel64 Family 6 Model 158 Stepping 9
	Microarchitecture: Kaby Lake
	Frequency (GHz): 4.30
	Number of physical packages: 1
	Number of physical CPUs: 4
	Number of logical CPUs: 8
	Graphics card #0 name: NVIDIA TITAN Xp
	Graphics card #0 vendor: NVIDIA (0x10de)
	Graphics card #0 VRAM (MB): 4095.00
	Graphics card #0 deviceId: 0x1b02
	Graphics card #0 versionInfo: DriverVersion=30.0.14.7111
	Memory slot #0 capacity (MB): 8192.00
	Memory slot #0 clockSpeed (GHz): 3.00
	Memory slot #0 type: DDR4
	Memory slot #1 capacity (MB): 8192.00
	Memory slot #1 clockSpeed (GHz): 3.00
	Memory slot #1 type: DDR4
	Virtual memory max (MB): 25523.14
	Virtual memory used (MB): 16542.67
	Swap memory total (MB): 9216.00
	Swap memory used (MB): 260.26
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Launched Version: 1.17.1
	Backend library: LWJGL version 3.2.2 build 10
	Backend API: ERR
	Window size: 1920x1017
	GL Caps: Using framebuffer using OpenGL 3.2
	GL debug messages: 
	Using VBOs: Yes
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
	Type: Integrated Server (map_client.txt)
	Graphics mode: fancy
	Resource Packs: vanilla
	Current Language: English (US)
	CPU: 8x Intel(R) Core(TM) i7-7740X CPU @ 4.30GHz
	Player Count: 1 / 8; [abs['blublu_owns123'/228, l='ServerLevel[tnt cannon]', x=1781.94, y=20.00, z=682.69]]
	Data Packs: vanilla