https://github.com/TheIllusiveC4/Comforts/blob/master/src/main/java/c4/comforts/common/util/SleepHelper.java#L171 seems to be causing a stacktrace for me every time i try to use a sleeping bag. The character using the bag doesn't lay down and no gui comes up or overlay. if no one else sleeps they're stuck that way until daytime.

[19:55:21] [Server thread/ERROR] [FML]: FMLIndexedMessageCodec exception caught io.netty.handler.codec.EncoderException: java.lang.RuntimeException: Undefined discriminator for message type SPacketSleep in channel comforts at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:106) ~[MessageToMessageEncoder.class:?] at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116) ~[MessageToMessageCodec.class:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[AbstractChannelHandlerContext.class:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[AbstractChannelHandlerContext.class:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[AbstractChannelHandlerContext.class:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[AbstractChannelHandlerContext.class:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[AbstractChannelHandlerContext.class:?] at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1032) ~[DefaultChannelPipeline.class:?] at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:296) ~[AbstractChannel.class:?] at net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper.sendTo(SimpleNetworkWrapper.java:250) [SimpleNetworkWrapper.class:?] at c4.comforts.common.util.SleepHelper.goToSleep(SleepHelper.java:171) [SleepHelper.class:?] at c4.comforts.common.items.ItemSleepingBag.func_77659_a(ItemSleepingBag.java:65) [ItemSleepingBag.class:?] at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:217) [aip.class:?] at net.minecraft.server.management.PlayerInteractionManager.func_187250_a(PlayerInteractionManager.java:358) [or.class:?] at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:763) [pa.class:?] at net.minecraft.network.play.client.CPacketPlayerTryUseItem.func_148833_a(SourceFile:32) [mb.class:?] at net.minecraft.network.play.client.CPacketPlayerTryUseItem.func_148833_a(SourceFile:9) [mb.class:?] at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_151] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_151] at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396) [nz.class:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151] Caused by: java.lang.RuntimeException: Undefined discriminator for message type SPacketSleep in channel comforts at net.minecraftforge.fml.common.network.FMLIndexedMessageToMessageCodec.encode(FMLIndexedMessageToMessageCodec.java:72) ~[FMLIndexedMessageToMessageCodec.class:?] at io.netty.handler.codec.MessageToMessageCodec$1.encode(MessageToMessageCodec.java:67) ~[MessageToMessageCodec$1.class:?] at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:88) ~[MessageToMessageEncoder.class:?] ... 25 more

I'm on forge 2705 (currently the latest recommended)

Can you reproduce this in single player or is this just on a server?

Yeah, you'll be stuck because if something happens to the packet transmission then the server and client desync and you're trapped in a figurative limbo. This could be caused by some updated Forge code, it's been a long time since I did anything to this mod. I'll look into it.

Fastest reply to a bug submission ever. thanks for the close attention. seems to only happen on server. Server and client using same forge and comforts version of course.
comforts-1.12.2-1.1.1.1.jar

Sorry I commented something completely stupid and related to 1.7.2 lol deleted it. Thanks for looking at this. It's almost certainly due to updated forge. I had another server on forget 25xx and this is 2705. Server on 25xx didn't have this problem.

May be related or same issue: TeamJM/journeymap#42
and this pull: MinecraftForge/MinecraftForge#4890

Alright, just had to make sure to register the message on both the client and the server so that the discriminator is known to both sides. Why didn't I do that to begin with? No idea.
Anyway, I'm uploading a new update to CurseForge right now so hopefully it'll be up soon for you.

thanks for the fast fix. will update today! You're awesome.