1.8.4 until the recent snapshots dont work for me D:

I start up my minecraft, click play, and then get this:
[11:13:34] [Client thread/INFO]: Setting user: Dwasserd
[11:13:34] [Client thread/INFO]: (Session ID is token:63a356e28a1d4898a105e07afb8f7a69:82de816c8c6f4ef39d96c152222befec)
Exception in thread "Client thread" java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213)
at com.google.common.collect.Lists$ReverseList.<init>(Lists.java:767)
at com.google.common.collect.Lists.reverse(Lists.java:759)
at lt.b(SourceFile:156)
at lt.<init>(SourceFile:43)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:155)
at bpo.<init>(SourceFile:41)
at ave.<init>(SourceFile:293)
at net.minecraft.client.main.Main.main(SourceFile:124)
Can someone help me please!