Here's the stack trace for it:
[02:49:10] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value!
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_91]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_91]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) [g.class:?]
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1041) [bcf.class:?]
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:366) [bcf.class:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value!
at net.minecraft.entity.ai.attributes.RangedAttribute.<init>(SourceFile:21) ~[ss.class:?]
at net.minecraft.client.network.NetHandlerPlayClient.func_147290_a(NetHandlerPlayClient.java:1963) ~[bks.class:?]
at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:70) ~[id.class:?]
at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:15) ~[id.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fh$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_91]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_91]
at net.minecraft.util.Util.func_181617_a(SourceFile:45) ~[g.class:?]
... 9 more
Please, don't let this stay in past the beta builds.. I can't read my console at all and my log sizes have went up 10 times as much (minimum).
Forge Build: 1887 (Latest version at time of posting. Build 1886, and 1865 have this issue, other versions were not tested)
Minecraft version: 1.9
No mods are installed.
This occurs while walking around in a server, it doesn't appear to happen in Single Player
Also:
It seems every colon is now overly escaped: