crash

i was on a minecraft server and i was going to one of the portals to that server and it said exception connection null and after that it said already connecting to the server and after a min of in the portal it said crashed

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 7/5/13 10:36 AM
Description: Unexpected error

java.lang.NullPointerException
	at bcu.a(SourceFile:308)
	at bdn.l_(SourceFile:74)
	at bdw.a(SourceFile:57)
	at atn.k(SourceFile:1396)
	at atn.S(SourceFile:662)
	at atn.d(SourceFile:618)
	at net.minecraft.client.main.Main.main(SourceFile:101)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Mac OS X (x86_64) version 10.8.4
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 142225080 bytes (135 MB) / 202321920 bytes (192 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 16377 (917112 bytes; 0 MB) allocated, 10668 (597408 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.1
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6770M OpenGL Engine GL version 2.1 ATI-1.8.18, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null