Game crashes when entering or exiting water

I loaded up a new world to see the new game features, but when I entered the water and was about to go under the surface, the game froze and had to be exited. When I loaded the same game up again, it saved under the water and trying to return to the surface caused the same crash.

Here is the complete output under "Development Console", taken right after the game crashes:

Launcher 1.2.1 (through bootstrap 5) started on windows...
Current time is Aug 8, 2013 6:56:19 PM
System.getProperty('os.name') == 'Windows 8'
System.getProperty('os.version') == '6.2'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_10'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'
Loaded 1 profile(s); selected 'Bellarmine'
Refreshing auth...
Logging in with access token
Delta time to compare resources: 2287 ms 
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Getting syncinfo for selected version
Queueing library & version downloads
Download job 'Version & Libraries' started (8 threads, 19 files)
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Used own copy as it matched etag
Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2.jar for job 'Version & Libraries': Used own copy as it matched etag
Job 'Version & Libraries' finished successfully
Launching game
Looking for old natives to clean up...
Unpacking natives to C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-281581094041754
Launching in C:\Users\AniMajor\AppData\Roaming\.minecraft
Running C:\Program Files\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Djava.library.path=C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-281581094041754 -cp C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2.jar net.minecraft.client.main.Main --username Bellarmine --session token:7b509451c1e44df7ba391b6846cbc313:d1f1d932fc684665aa21c55ff4db129e --version 1.6.2 --gameDir C:\Users\AniMajor\AppData\Roaming\.minecraft --assetsDir C:\Users\AniMajor\AppData\Roaming\.minecraft\assets
Client> 2013-08-08 18:56:48 [CLIENT] [INFO] Setting user: Bellarmine
Client> 2013-08-08 18:56:48 [CLIENT] [INFO] (Session ID is token:7b509451c1e44df7ba391b6846cbc313:d1f1d932fc684665aa21c55ff4db129e)
Client> 2013-08-08 18:56:48 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> 2013-08-08 18:56:48 [CLIENT] [INFO] Reloading ResourceManager: Default
Client> 
Client> Starting up SoundSystem...
Client> Initializing LWJGL OpenAL
Client>     (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client> 
Client> 2013-08-08 18:57:03 [SERVER] [INFO] Starting integrated minecraft server version 1.6.2
Client> 2013-08-08 18:57:03 [SERVER] [INFO] Generating keypair
Client> 2013-08-08 18:57:03 [SERVER] [INFO] Preparing start region for level 0
Client> loading single player
Client> 2013-08-08 18:57:04 [SERVER] [INFO] Bellarmine[/127.0.0.1:0] logged in with entity id 196 at (200.41712644109185, 67.0, 244.1316983102414)
Client> 2013-08-08 18:57:04 [SERVER] [INFO] Bellarmine joined the game
Client> Setting up custom skins
Client> 2013-08-08 18:57:17 [SERVER] [INFO] Saving and pausing game...
Client> 2013-08-08 18:57:17 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/Overworld
Client> 2013-08-08 18:57:18 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/Nether
Client> 2013-08-08 18:57:18 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/The End