Minecraft Forums

Hi, i loaded up my minecraft for the first time in 5 hours and this is what happend

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
[18:33:13] [Client thread/INFO]: Setting user: JordanTrash
[18:33:13] [Client thread/INFO]: (Session ID is removed)
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)

WHen i try to use optifine it comes out with Nothing

Help?

This is a sign of a corrupt 'usercache.json' file. https://bugs.mojang.com/browse/MC-79947

Delete the file %appdata%/.minecraft/usercache.json

Note that you will probably have to log into minecraft again after this.