OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
[18:56:01] [Client thread/INFO]: Setting user: moulins
Exception in thread "Client thread" java.lang.ExceptionInInitializerError
	at pc.c(SourceFile:466)
	at ces.<init>(SourceFile:355)
	at net.minecraft.client.main.Main.main(SourceFile:144)
Caused by: java.util.ConcurrentModificationException
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1139)
	at com.mojang.datafixers.DSL.taggedChoiceType(DSL.java:213)
	at com.mojang.datafixers.types.templates.TaggedChoice.lambda$null$1(TaggedChoice.java:72)
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1138)
	at com.mojang.datafixers.types.templates.TaggedChoice.lambda$apply$2(TaggedChoice.java:71)
	at com.mojang.datafixers.types.templates.Named.lambda$apply$0(Named.java:43)
	at com.mojang.datafixers.types.templates.Check$1.apply(Check.java:45)
	at com.mojang.datafixers.types.templates.Sum$1.apply(Sum.java:50)
	at com.mojang.datafixers.types.templates.Sum$1.apply(Sum.java:50)
	at com.mojang.datafixers.types.templates.Sum$1.apply(Sum.java:50)
	at com.mojang.datafixers.types.templates.Sum$1.apply(Sum.java:50)
	at com.mojang.datafixers.types.families.RecursiveTypeFamily.lambda$null$1(RecursiveTypeFamily.java:107)
	at com.mojang.datafixers.types.templates.RecursivePoint$RecursivePointType.unfold(RecursivePoint.java:132)
	at com.mojang.datafixers.types.templates.RecursivePoint$RecursivePointType.findCheckedType(RecursivePoint.java:183)
	at com.mojang.datafixers.schemas.Schema.getType(Schema.java:80)
	at com.mojang.datafixers.schemas.Schema.findChoiceType(Schema.java:111)
	at com.mojang.datafixers.schemas.Schema.getChoiceType(Schema.java:103)
	at aay.getChoiceType(SourceFile:23)
	at aef$a.a(SourceFile:440)
	at aef.a(SourceFile:131)
	at aef.<clinit>(SourceFile:137)
	... 3 more