---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 1/8/2020 11:50 πμ
Description: Starting integrated server

java.lang.UnsupportedOperationException: Trying to add tag of type 8 to list of 10
	at mi.c(SourceFile:254)
	at mi.add(SourceFile:19)
	at java.util.AbstractList.add(AbstractList.java:108)
	at mn.a(SourceFile:169)
	at mn$$Lambda$3975/2030318015.accept(Unknown Source)
	at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:408)
	at mn.a(SourceFile:169)
	at mn.a(SourceFile:196)
	at mn.mergeToList(SourceFile:26)
	at com.mojang.serialization.ListBuilder$Builder.lambda$build$3(ListBuilder.java:74)
	at com.mojang.serialization.ListBuilder$Builder$$Lambda$3973/304581916.apply(Unknown Source)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.serialization.DataResult$$Lambda$648/1532216261.apply(Unknown Source)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.ListBuilder$Builder.build(ListBuilder.java:74)
	at com.mojang.serialization.codecs.ListCodec.encode(ListCodec.java:34)
	at com.mojang.serialization.codecs.ListCodec.encode(ListCodec.java:19)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$8.encode(RecordCodecBuilder.java:379)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$8.encode(RecordCodecBuilder.java:377)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at vg.a(SourceFile:35)
	at ve.a(SourceFile:27)
	at ve.encode(SourceFile:11)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.MapEncoder$1.encode(MapEncoder.java:26)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.MapCodec$2.encode(MapCodec.java:68)
	at com.mojang.serialization.codecs.KeyDispatchCodec.encode(KeyDispatchCodec.java:92)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$6.encode(RecordCodecBuilder.java:295)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.codecs.KeyDispatchCodec.encode(KeyDispatchCodec.java:92)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$4.encode(RecordCodecBuilder.java:223)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.BaseMapCodec.encode(BaseMapCodec.java:52)
	at com.mojang.serialization.codecs.UnboundedMapCodec.encode(UnboundedMapCodec.java:43)
	at com.mojang.serialization.codecs.UnboundedMapCodec.encode(UnboundedMapCodec.java:17)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at vd.a(SourceFile:28)
	at vd.encode(SourceFile:11)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$6.encode(RecordCodecBuilder.java:296)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at cyf.a(SourceFile:250)
	at cyf.a(SourceFile:231)
	at cya$a.a(SourceFile:339)
	at cya$a.a(SourceFile:333)
	at djt.a(SourceFile:1782)
	at djt.a(SourceFile:1697)
	at dru.p(SourceFile:298)
	at dru.b(SourceFile:238)
	at dru$$Lambda$3117/1181220160.onPress(Unknown Source)
	at dld.b(SourceFile:33)
	at dkx.a(SourceFile:16)
	at dlb.a(SourceFile:149)
	at dmb.a(SourceFile:27)
	at dju.b(SourceFile:92)
	at dju$$Lambda$2990/1075996770.run(Unknown Source)
	at don.a(SourceFile:435)
	at dju.a(SourceFile:92)
	at dju.c(SourceFile:162)
	at dju$$Lambda$2989/1461724962.run(Unknown Source)
	at anw.execute(SourceFile:94)
	at dju.b(SourceFile:162)
	at dju$$Lambda$2343/1658789646.invoke(Unknown Source)
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
	at org.lwjgl.system.JNI.invokeV(Native Method)
	at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
	at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:127)
	at djt.e(SourceFile:1043)
	at djt.e(SourceFile:653)
	at net.minecraft.client.main.Main.main(SourceFile:215)


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

-- Head --
Thread: Render thread
Stacktrace:
	at mi.c(SourceFile:254)
	at mi.add(SourceFile:19)
	at java.util.AbstractList.add(AbstractList.java:108)
	at mn.a(SourceFile:169)
	at mn$$Lambda$3975/2030318015.accept(Unknown Source)
	at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:408)
	at mn.a(SourceFile:169)
	at mn.a(SourceFile:196)
	at mn.mergeToList(SourceFile:26)
	at com.mojang.serialization.ListBuilder$Builder.lambda$build$3(ListBuilder.java:74)
	at com.mojang.serialization.ListBuilder$Builder$$Lambda$3973/304581916.apply(Unknown Source)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.serialization.DataResult$$Lambda$648/1532216261.apply(Unknown Source)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.ListBuilder$Builder.build(ListBuilder.java:74)
	at com.mojang.serialization.codecs.ListCodec.encode(ListCodec.java:34)
	at com.mojang.serialization.codecs.ListCodec.encode(ListCodec.java:19)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$8.encode(RecordCodecBuilder.java:379)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$8.encode(RecordCodecBuilder.java:377)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at vg.a(SourceFile:35)
	at ve.a(SourceFile:27)
	at ve.encode(SourceFile:11)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.MapEncoder$1.encode(MapEncoder.java:26)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.MapCodec$2.encode(MapCodec.java:68)
	at com.mojang.serialization.codecs.KeyDispatchCodec.encode(KeyDispatchCodec.java:92)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$6.encode(RecordCodecBuilder.java:295)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.codecs.KeyDispatchCodec.encode(KeyDispatchCodec.java:92)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$4.encode(RecordCodecBuilder.java:223)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.BaseMapCodec.encode(BaseMapCodec.java:52)
	at com.mojang.serialization.codecs.UnboundedMapCodec.encode(UnboundedMapCodec.java:43)
	at com.mojang.serialization.codecs.UnboundedMapCodec.encode(UnboundedMapCodec.java:17)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at vd.a(SourceFile:28)
	at vd.encode(SourceFile:11)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24)
	at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$6.encode(RecordCodecBuilder.java:296)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
	at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96)
	at com.mojang.serialization.Encoder$1.encode(Encoder.java:25)
	at com.mojang.serialization.Codec$2.encode(Codec.java:76)
	at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
	at cyf.a(SourceFile:250)
	at cyf.a(SourceFile:231)
	at cya$a.a(SourceFile:339)
	at cya$a.a(SourceFile:333)

-- Starting integrated server --
Details:
	Level ID: ct
	Level Name: ct
Stacktrace:
	at djt.a(SourceFile:1782)
	at djt.a(SourceFile:1697)
	at dru.p(SourceFile:298)
	at dru.b(SourceFile:238)
	at dru$$Lambda$3117/1181220160.onPress(Unknown Source)
	at dld.b(SourceFile:33)
	at dkx.a(SourceFile:16)
	at dlb.a(SourceFile:149)
	at dmb.a(SourceFile:27)
	at dju.b(SourceFile:92)
	at dju$$Lambda$2990/1075996770.run(Unknown Source)

-- Affected screen --
Details:
	Screen name: dru
Stacktrace:
	at don.a(SourceFile:435)
	at dju.a(SourceFile:92)
	at dju.c(SourceFile:162)
	at dju$$Lambda$2989/1461724962.run(Unknown Source)
	at anw.execute(SourceFile:94)
	at dju.b(SourceFile:162)
	at dju$$Lambda$2343/1658789646.invoke(Unknown Source)
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
	at org.lwjgl.system.JNI.invokeV(Native Method)
	at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
	at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:127)
	at djt.e(SourceFile:1043)
	at djt.e(SourceFile:653)
	at net.minecraft.client.main.Main.main(SourceFile:215)

-- System Details --
Details:
	Minecraft Version: 1.16.2 Pre-release 1
	Minecraft Version ID: 1.16.2-pre1
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1500922864 bytes (1431 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
	CPUs: 4
	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: 1.16.2-pre1
	Backend library: LWJGL version 3.2.2 build 10
	Backend API: GeForce 310M/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	GL Caps: Using framebuffer using OpenGL 3.0
	Using VBOs: Yes
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Graphics mode: fancy
	Resource Packs: vanilla
	Current Language: English (US)
	CPU: 4x Intel(R) Core(TM) i3 CPU M 380 @ 2.53GHz