2:53:50] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: readerIndex(1) + length(80) exceeds writerIndex(72): UnpooledHeapByteBuf(ridx: 1, widx: 72, cap: 72)
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_51]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_51]
	at g.a(SourceFile:45) [g.class:?]
	at ave.av(SourceFile:881) [ave.class:?]
	at ave.a(SourceFile:325) [ave.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:124) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]
	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.IndexOutOfBoundsException: readerIndex(1) + length(80) exceeds writerIndex(72): UnpooledHeapByteBuf(ridx: 1, widx: 72, cap: 72)
	at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1175) ~[AbstractByteBuf.class:4.0.23.Final]
	at io.netty.buffer.AbstractByteBuf.readBytes(AbstractByteBuf.java:655) ~[AbstractByteBuf.class:4.0.23.Final]
	at em.readBytes(SourceFile:669) ~[em.class:?]
	at em.c(SourceFile:243) ~[em.class:?]
	at bcy.a(SourceFile:1291) ~[bcy.class:?]
	at gg.a(SourceFile:52) ~[gg.class:?]
	at gg.a(SourceFile:9) ~[gg.class:?]
	at fh$1.run(SourceFile:13) ~[fh$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_51]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_51]
	at g.a(SourceFile:44) ~[g.class:?]
	... 9 more