Exception in thread "Client thread" java.lang.NullPointerException

minecraft will not open gives this error
Completely ignored arguments: [--nativeLauncherVersion, 286]
[18:55:53] [Client thread/INFO]: Setting user: Wolf_Kat_Darknes
[18:55:53] [Client thread/INFO]: (Session ID is token:d47a64ad8f8d456e8468c390e5dec448:f8ba42f00a2140b9b8247cd7af7e85b1)
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)
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release