Crash when quickly generating new terrain while world is still loading

Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: 610
	at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
	at rz.c(SourceFile:130)
	at sg.a(SourceFile:84)
	at sh.c(SourceFile:144)
	at sa.k_(SourceFile:221)
	at net.minecraft.server.MinecraftServer.w(SourceFile:695)
	at net.minecraft.server.MinecraftServer.v(SourceFile:628)
	at cvl.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:533)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 610
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$MapIterator.nextEntry(Long2LongLinkedOpenHashMap.java:1207)
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$EntryIterator.next(Long2LongLinkedOpenHashMap.java:1299)
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$EntryIterator.next(Long2LongLinkedOpenHashMap.java:1288)
	at atf.a(SourceFile:25)
	at atf.get(SourceFile:49)
	at it.unimi.dsi.fastutil.longs.AbstractLong2ObjectFunction.get(AbstractLong2ObjectFunction.java:148)
	at java.util.Map.computeIfAbsent(Map.java:955)
	at sr.a(SourceFile:42)
	at sr.a(SourceFile:23)
	at zo.c(SourceFile:102)
	at rz.d(SourceFile:154)
	at bly.a(SourceFile:228)
	at bly.a(SourceFile:82)
	at bny.a(SourceFile:16)
	at bny.a(SourceFile:13)
	at bit.a(SourceFile:27)
	at aud.a(SourceFile:416)
	at bif.b(SourceFile:122)
	at sn.a(SourceFile:13)
	at sm.a(SourceFile:34)
	at bgq.a(SourceFile:89)
	at sr.a(SourceFile:54)
	at sr.a(SourceFile:23)
	at zo$a.a(SourceFile:143)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	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:1692)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)