Crashes when running around

While I was playing the new snapshot, I started running around and it crashed. Here is the full log.

[15:08:57] [Client thread/INFO]: Setting user: Randomblock1
[15:08:57] [Client thread/INFO]: (Session ID is token:b8a9c9066422439ab47fa5c64e51ad67:0961d31fb6ee43f0bb132b3a0b8412d8)
[15:09:01] [Client thread/INFO]: LWJGL Version: 2.9.4
[15:09:04] [Client thread/INFO]: Reloading ResourceManager: Default
[15:09:04] [Sound Library Loader/INFO]: Starting up SoundSystem...
[15:09:05] [Thread-6/INFO]: Initializing LWJGL OpenAL
[15:09:05] [Thread-6/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[15:09:05] [Thread-6/INFO]: OpenAL initialized.
[15:09:05] [Sound Library Loader/INFO]: Sound engine started
[15:09:12] [Client thread/INFO]: Created: 512x512 textures-atlas
[15:09:17] [Client thread/ERROR]: Exception reading D:\Users\Benjamin\AppData\Roaming\.minecraft\saves\COMBAT UPDATE_!_\level.dat
java.util.zip.ZipException: Not in GZIP format
	at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
	at dx.a(SourceFile:24) ~[15w35b.jar:?]
	at axr.a(SourceFile:82) [15w35b.jar:?]
	at axr.c(SourceFile:66) [15w35b.jar:?]
	at axo.b(SourceFile:57) [15w35b.jar:?]
	at bej.e(SourceFile:35) [15w35b.jar:?]
	at bej.<init>(SourceFile:28) [15w35b.jar:?]
	at beh.b(SourceFile:43) [15w35b.jar:?]
	at bbx.a(SourceFile:367) [15w35b.jar:?]
	at azh.a(SourceFile:858) [15w35b.jar:?]
	at bce.a(SourceFile:216) [15w35b.jar:?]
	at bbx.a(SourceFile:341) [15w35b.jar:?]
	at bce.a(SourceFile:473) [15w35b.jar:?]
	at bbx.k(SourceFile:404) [15w35b.jar:?]
	at bbx.p(SourceFile:381) [15w35b.jar:?]
	at azh.s(SourceFile:1532) [15w35b.jar:?]
	at azh.av(SourceFile:926) [15w35b.jar:?]
	at azh.a(SourceFile:375) [15w35b.jar:?]
	at net.minecraft.client.main.Main.main(SourceFile:125) [15w35b.jar:?]
[15:09:17] [Client thread/ERROR]: Exception reading D:\Users\Benjamin\AppData\Roaming\.minecraft\saves\COMBAT UPDATE_!_\level.dat_old
java.util.zip.ZipException: Not in GZIP format
	at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
	at dx.a(SourceFile:24) ~[15w35b.jar:?]
	at axr.a(SourceFile:82) [15w35b.jar:?]
	at axr.c(SourceFile:74) [15w35b.jar:?]
	at axo.b(SourceFile:57) [15w35b.jar:?]
	at bej.e(SourceFile:35) [15w35b.jar:?]
	at bej.<init>(SourceFile:28) [15w35b.jar:?]
	at beh.b(SourceFile:43) [15w35b.jar:?]
	at bbx.a(SourceFile:367) [15w35b.jar:?]
	at azh.a(SourceFile:858) [15w35b.jar:?]
	at bce.a(SourceFile:216) [15w35b.jar:?]
	at bbx.a(SourceFile:341) [15w35b.jar:?]
	at bce.a(SourceFile:473) [15w35b.jar:?]
	at bbx.k(SourceFile:404) [15w35b.jar:?]
	at bbx.p(SourceFile:381) [15w35b.jar:?]
	at azh.s(SourceFile:1532) [15w35b.jar:?]
	at azh.av(SourceFile:926) [15w35b.jar:?]
	at azh.a(SourceFile:375) [15w35b.jar:?]
	at net.minecraft.client.main.Main.main(SourceFile:125) [15w35b.jar:?]
[15:09:18] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:18] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:18] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:18] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:21] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:21] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:21] [Server thread/INFO]: Starting integrated minecraft server version 15w35b
[15:09:21] [Server thread/INFO]: Generating keypair
[15:09:22] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:22] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:22] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:22] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:22] [Server thread/INFO]: Preparing start region for level 0
[15:09:23] [Server thread/INFO]: Preparing spawn area: 1%
[15:09:24] [Server thread/INFO]: Preparing spawn area: 26%
[15:09:25] [Server thread/INFO]: Preparing spawn area: 70%
[15:09:26] [Server thread/INFO]: Changing view distance to 8, from 10
[15:09:27] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:27] [Server thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
[15:09:27] [Server thread/INFO]: Randomblock1[local:E:48788332] logged in with entity id 96 at (362.21896018367096, 67.0, -421.24092438322975)
[15:09:27] [Server thread/INFO]: Randomblock1 joined the game
[15:09:30] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2256ms behind, skipping 45 tick(s)
[15:09:34] [Server thread/INFO]: Saving and pausing game...
[15:09:34] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Overworld
[15:09:36] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Nether
[15:09:36] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/The End
[15:09:53] [Server thread/INFO]: Saving and pausing game...
[15:09:53] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Overworld
[15:09:53] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Nether
[15:09:53] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/The End
[15:10:26] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 5687ms behind, skipping 113 tick(s)
[15:10:29] [Server thread/INFO]: Saving and pausing game...
[15:10:29] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Overworld
[15:10:30] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Nether
[15:10:30] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/The End
[15:10:51] [Server thread/INFO]: Saving and pausing game...
[15:10:51] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Overworld
[15:10:52] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/Nether
[15:10:52] [Server thread/INFO]: Saving chunks for level 'Weapon Cooldown'/The End
[15:11:08] [Client thread/INFO]: Reloading ResourceManager: Default
[15:11:09] [Client thread/INFO]: SoundSystem shutting down...
[15:11:09] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
[15:11:09] [Sound Library Loader/INFO]: Starting up SoundSystem...
[15:11:09] [Thread-10/INFO]: Initializing LWJGL OpenAL
[15:11:09] [Thread-10/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[15:11:09] [Thread-10/INFO]: OpenAL initialized.
[15:11:09] [Sound Library Loader/INFO]: Sound engine started
[15:11:12] [Client thread/INFO]: Created: 512x512 textures-atlas
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000006af956ff, pid=5780, tid=1052
#
# JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# V  [jvm.dll+0x4e56ff]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# D:\Users\Benjamin\AppData\Roaming\.minecraft\hs_err_pid5780.log
#
# Compiler replay data is saved as:
# D:\Users\Benjamin\AppData\Roaming\.minecraft\replay_pid5780.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
#
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release