[19:14:10] [Server thread/INFO]: System chat: [midorikuma: Running function postfx_repro:start]
[19:14:10] [Render thread/INFO]: [System] [CHAT] Running function postfx_repro:start
[19:14:10] [Render thread/INFO]: [System] [CHAT] [PostFX Repro] Started (4096 entries + toggle).
[19:14:10] [Netty Local IO #0/ERROR]: Error sending packet clientbound/minecraft:post_effects
io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:post_effects'
	at net.minecraft.network.codec.IdDispatchCodec.encode(IdDispatchCodec.java:61)
	at net.minecraft.network.codec.IdDispatchCodec.encode(IdDispatchCodec.java:14)
	at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:26)
	at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:12)
	at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:800)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:737)
	at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:113)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:800)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:737)
	at io.netty.channel.ChannelOutboundHandlerAdapter.write(ChannelOutboundHandlerAdapter.java:113)
	at net.minecraft.network.Connection$2.write(Connection.java:487)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:800)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:737)
	at io.netty.channel.DefaultChannelPipeline.write(DefaultChannelPipeline.java:1036)
	at io.netty.channel.Channel.write(Channel.java:267)
	at net.minecraft.network.Connection.doSendPacket(Connection.java:329)
	at net.minecraft.network.Connection.lambda$sendPacket$0(Connection.java:317)
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:148)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:141)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:535)
	at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:201)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1204)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1474)
Caused by: java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096)
	at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050)
	at net.minecraft.network.codec.ByteBufCodecs$26.encode(ByteBufCodecs.java:491)
	at net.minecraft.network.codec.ByteBufCodecs$26.encode(ByteBufCodecs.java:477)
	at net.minecraft.network.codec.StreamCodec$7.encode(StreamCodec.java:142)
	at net.minecraft.network.codec.StreamCodec$5.encode(StreamCodec.java:103)
	at net.minecraft.network.codec.StreamCodec$5.encode(StreamCodec.java:93)
	at net.minecraft.network.codec.IdDispatchCodec.encode(IdDispatchCodec.java:56)
	... 24 more
[19:14:10] [Server thread/INFO]: midorikuma lost connection: Internal Exception: io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:post_effects'
[19:14:10] [Server thread/INFO]: System chat: midorikuma left the game
[19:14:10] [Server thread/INFO]: Stopping singleplayer server as player logged out
[19:14:10] [Server thread/INFO]: Stopping server
[19:14:10] [Server thread/INFO]: Saving players
[19:14:10] [Server thread/INFO]: Saving worlds
[19:14:10] [Server thread/INFO]: Saving chunks for level 'ServerLevel[shaderSS]'/minecraft:overworld
[19:14:12] [Server thread/INFO]: Saving chunks for level 'ServerLevel[shaderSS]'/minecraft:the_end
[19:14:12] [Server thread/INFO]: Saving chunks for level 'ServerLevel[shaderSS]'/minecraft:the_nether
[19:14:12] [Render thread/WARN]: Client disconnected with reason: Internal Exception: io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:post_effects'