---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 26.06.18 22:30
Description: Writing into PalettedContainer from multiple threads

java.lang.IllegalStateException
	at brl.b(SourceFile:51)
	at brl.a(SourceFile:118)
	at brf.a(SourceFile:68)
	at brm.a(SourceFile:167)
	at tc.a(SourceFile:225)
	at bvz.a(SourceFile:133)
	at bvz.a(SourceFile:42)
	at bvz.a(SourceFile:14)
	at bzt.a(SourceFile:21)
	at bzt.a(SourceFile:14)
	at bti.a(SourceFile:27)
	at bct.a(SourceFile:515)
	at bqu.a(SourceFile:109)
	at tl.a(SourceFile:12)
	at tk.a(SourceFile:35)
	at bqy.a(SourceFile:95)
	at tr.a(SourceFile:62)
	at tr.a(SourceFile:25)
	at ahb$a.a(SourceFile:130)
	at ahb$a$$Lambda$1727/1685805745.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)


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

-- Head --
Thread: Server thread
Stacktrace:
	at brl.b(SourceFile:51)

-- Thread dumps --
Details:
	Thread dumps: WorldGen-Worker-12: java.lang.Thread.getStackTrace(Thread.java:1552)
		brl.a(SourceFile:49)
		brl$$Lambda$1738/412025973.apply(Unknown Source)
		java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
		java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
		java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:741)
		java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
		java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
		java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
		java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
		java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
		brl.b(SourceFile:50)
		brl.a(SourceFile:118)
		brf.a(SourceFile:68)
		brm.a(SourceFile:167)
		tc.a(SourceFile:225)
		bvz.a(SourceFile:133)
		bvz.a(SourceFile:42)
		bvz.a(SourceFile:14)
		bzt.a(SourceFile:21)
		bzt.a(SourceFile:14)
		bti.a(SourceFile:27)
		bct.a(SourceFile:515)
		bqu.a(SourceFile:109)
		tl.a(SourceFile:12)
		tk.a(SourceFile:35)
		bqy.a(SourceFile:95)
		tr.a(SourceFile:62)
		tr.a(SourceFile:25)
		ahb$a.a(SourceFile:130)
		ahb$a$$Lambda$1727/1685805745.apply(Unknown Source)
		java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
		java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
		java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
		java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
		java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
		java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
WorldGen-Worker-12: java.lang.Thread.getStackTrace(Thread.java:1552)
		brl.a(SourceFile:49)
		brl$$Lambda$1738/412025973.apply(Unknown Source)
		java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
		java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
		java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:741)
		java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
		java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
		java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
		java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
		java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
		brl.b(SourceFile:50)
		brl.a(SourceFile:118)
		brf.a(SourceFile:68)
		brm.a(SourceFile:167)
		tc.a(SourceFile:225)
		bvz.a(SourceFile:133)
		bvz.a(SourceFile:42)
		bvz.a(SourceFile:14)
		bzt.a(SourceFile:21)
		bzt.a(SourceFile:14)
		bti.a(SourceFile:27)
		bct.a(SourceFile:515)
		bqu.a(SourceFile:109)
		tl.a(SourceFile:12)
		tk.a(SourceFile:35)
		bqy.a(SourceFile:95)
		tr.a(SourceFile:62)
		tr.a(SourceFile:25)
		ahb$a.a(SourceFile:130)
		ahb$a$$Lambda$1727/1685805745.apply(Unknown Source)
		java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
		java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
		java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
		java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
		java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
		java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Stacktrace:
	at brl.b(SourceFile:51)
	at brl.a(SourceFile:118)
	at brf.a(SourceFile:68)
	at brm.a(SourceFile:167)
	at tc.a(SourceFile:225)
	at bvz.a(SourceFile:133)
	at bvz.a(SourceFile:42)
	at bvz.a(SourceFile:14)
	at bzt.a(SourceFile:21)
	at bzt.a(SourceFile:14)
	at bti.a(SourceFile:27)
	at bct.a(SourceFile:515)
	at bqu.a(SourceFile:109)
	at tl.a(SourceFile:12)
	at tk.a(SourceFile:35)
	at bqy.a(SourceFile:95)
	at tr.a(SourceFile:62)
	at tr.a(SourceFile:25)
	at ahb$a.a(SourceFile:130)
	at ahb$a$$Lambda$1727/1685805745.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

-- System Details --
Details:
	Minecraft Version: 1.13-pre4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 737175128 bytes (703 MB) / 1073217536 bytes (1023 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.