This happened after hitting "Save & Quit to Title"

---- Minecraft Crash Report ----
// I let you down. Sorry

Time: 7/26/14 1:31 PM
Description: Updating screen events

java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.fastRemove(ArrayList.java:441)
at java.util.ArrayList.remove(ArrayList.java:424)
at qj.b(SourceFile:65)
at qi.c(SourceFile:326)
at sf.e(SourceFile:300)
at cwp.t(SourceFile:311)
at brp.a(SourceFile:1942)
at brp.a(SourceFile:1930)
at bvq.a(SourceFile:46)
at bvx.a(SourceFile:342)
at bvx.k(SourceFile:405)
at bvx.p(SourceFile:382)
at brp.r(SourceFile:1476)
at brp.ar(SourceFile:871)
at brp.a(SourceFile:311)
at net.minecraft.client.main.Main.main(SourceFile:120)

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

– Head –
Stacktrace:
at java.util.ArrayList.fastRemove(ArrayList.java:441)
at java.util.ArrayList.remove(ArrayList.java:424)
at qj.b(SourceFile:65)
at qi.c(SourceFile:326)
at sf.e(SourceFile:300)
at cwp.t(SourceFile:311)
at brp.a(SourceFile:1942)
at brp.a(SourceFile:1930)
at bvq.a(SourceFile:46)
at bvx.a(SourceFile:342)
at bvx.k(SourceFile:405)
at bvx.p(SourceFile:382)

– Affected screen –
Details:
Screen name: bvq

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [cha['jacksoncooley'/12, l='MpServer', x=-814.70, y=9.15, z=158.08]]
Chunk stats: MultiplayerChunkCache: 625, 625
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: -822.00,4.00,100.00 - World: (-822,4,100), Chunk: (at 10,0,4 in -52,6; contains blocks -832,0,96 to -817,255,111), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
Level time: 1954693 game time, 6000 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 10 total; [adp['entity.MinecartFurnace.name'/0, l='MpServer', x=-854.50, y=4.06, z=104.50], adr['entity.MinecartRideable.name'/1, l='MpServer', x=-856.94, y=4.06, z=104.50], abn['Chicken'/3, l='MpServer', x=-803.81, y=4.00, z=77.78], abw['Pig'/5, l='MpServer', x=-805.47, y=4.00, z=77.53], aea['Creeper'/1370, l='MpServer', x=-801.50, y=4.00, z=77.50], xf['entity.ItemFrame.name'/6, l='MpServer', x=-792.03, y=5.50, z=69.50], abo['Cow'/9, l='MpServer', x=-791.50, y=4.00, z=111.50], afz['Villager'/10, l='MpServer', x=-778.53, y=4.00, z=108.91], abx['Rabbit'/11, l='MpServer', x=-764.53, y=4.00, z=120.53], cha['jacksoncooley'/12, l='MpServer', x=-814.70, y=9.15, z=158.08]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at ccz.a(SourceFile:308)
at brp.b(SourceFile:2254)
at brp.a(SourceFile:320)
at net.minecraft.client.main.Main.main(SourceFile:120)

– System Details –
Details:
Minecraft Version: 14w30c
Operating System: Mac OS X (x86_64) version 10.9.4
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 196131616 bytes (187 MB) / 320847872 bytes (305 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w30c
LWJGL: 2.9.1
OpenGL: Intel Iris OpenGL Engine GL version 2.1 INTEL-8.28.30, Intel Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)