[MC-100963] Crash on server join

When I try to join any server, it says it's connecting, logging in, then the logging in screen disappears and the game crashes. I keep trying to redownload minecraft by deleting the .minecraft folder (I have a backup of resource packs and worlds, so don't worry about that), but it still doesn't work.

Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at aht.a(SourceFile:1175)
	at bnd.h(SourceFile:1591)
	at bnd.a(SourceFile:1180)
	at bnd.b(SourceFile:1165)
	at bnd.a(SourceFile:1012)
	at bcc.av(SourceFile:985)
	at bcc.a(SourceFile:392)
	at net.minecraft.client.main.Main.main(SourceFile:124)