Minecraft Crashing Without opening game

The game does not load up, works fine when opening other versions, just the latest snapshot is affected.

Copy of the launchers text scince previous attempt is as follows:

[18:01:50 INFO]: Deleting C:\Users\conal\AppData\Roaming\.minecraft\versions\13w47c\13w47c-natives-80096513575867
[18:01:50 INFO]: Getting syncinfo for selected version
[18:01:50 INFO]: Queueing library & version downloads
[18:01:50 INFO]: Installed CompleteVersion{id='13w47c', time=Thu Nov 21 17:10:33 GMT 2013, type=SNAPSHOT, libraries=[Library{name='java3d:vecmath:1.3.1', rules=null, natives=null, extract=null}, Library{name='net.sf.trove4j:trove4j:3.0.3', rules=null, natives=null, extract=null}, Library{name='com.ibm.icu:icu4j-core-mojang:51.2', rules=null, natives=null, extract=null}, Library{name='net.sf.jopt-simple:jopt-simple:4.5', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecjorbis:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecwav:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:libraryjavasound:20101123', rules=null, natives=null, extract=null}, Library{name='com.paulscode:librarylwjglopenal:20100824', rules=null, natives=null, extract=null}, Library{name='com.paulscode:soundsystem:20120107', rules=null, natives=null, extract=null}, Library{name='io.netty:netty-all:4.0.10.Final', rules=null, natives=null, extract=null}, Library{name='com.google.guava:guava:15.0', rules=null, natives=null, extract=null}, Library{name='org.apache.commons:commons-lang3:3.1', rules=null, natives=null, extract=null}, Library{name='commons-io:commons-io:2.4', rules=null, natives=null, extract=null}, Library{name='net.java.jinput:jinput:2.0.5', rules=null, natives=null, extract=null}, Library{name='net.java.jutils:jutils:1.0.0', rules=null, natives=null, extract=null}, Library{name='com.google.code.gson:gson:2.2.4', rules=null, natives=null, extract=null}, Library{name='com.mojang:authlib:1.2', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-api:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-core:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl:2.9.1-nightly-20131120', rules=null, natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl_util:2.9.1-nightly-20131120', rules=null, natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl-platform:2.9.1-nightly-20131120', rules=null, natives={LINUX=natives-linux, WINDOWS=natives-windows, OSX=natives-osx}, extract=net.minecraft.launcher.versions.ExtractRules@438be669}, Library{name='net.java.jinput:jinput-platform:2.0.5', rules=null, natives={LINUX=natives-linux, WINDOWS=natives-windows, OSX=natives-osx}, extract=net.minecraft.launcher.versions.ExtractRules@15c41a24}, Library{name='tv.twitch:twitch:5.9', rules=null, natives=null, extract=null}, Library{name='tv.twitch:twitch-platform:5.9', rules=[Rule{action=ALLOW, os=null}, Rule{action=DISALLOW, os=OSRestriction{name=LINUX, version='null'}}], natives={LINUX=natives-linux, WINDOWS=natives-windows-${arch}, OSX=natives-osx}, extract=net.minecraft.launcher.versions.ExtractRules@7d903ca5}, Library{name='tv.twitch:twitch-external-platform:4.5', rules=[Rule{action=ALLOW, os=OSRestriction{name=WINDOWS, version='null'}}], natives={WINDOWS=natives-windows-${arch}}, extract=net.minecraft.launcher.versions.ExtractRules@87db50a}], mainClass='net.minecraft.client.main.Main', minimumLauncherVersion=10}
[18:01:50 INFO]: Download job 'Version & Libraries' started (8 threads, 27 files)
[18:01:50 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:50 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:50 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:50 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1-nightly-20131120\lwjgl_util-2.9.1-nightly-20131120.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1-nightly-20131120\lwjgl-2.9.1-nightly-20131120.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.2\authlib-1.2.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\5.9\twitch-platform-5.9-natives-windows-64.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-64.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.9\twitch-5.9.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1-nightly-20131120\lwjgl-platform-2.9.1-nightly-20131120-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\AppData\Roaming\.minecraft\versions\13w47c\13w47c.jar for job 'Version & Libraries': Used own copy as it matched etag
[18:01:51 INFO]: Finished downloading C:\Users\conal\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
[18:01:51 INFO]: Job 'Version & Libraries' finished successfully
[18:01:51 INFO]: Launching game
[18:01:51 INFO]: Looking for old natives to clean up...
[18:01:51 INFO]: Unpacking natives to C:\Users\conal\AppData\Roaming\.minecraft\versions\13w47c\13w47c-natives-80236825195396
[18:01:53 INFO]: Launching in C:\Users\conal\Minecraft\1.7
[18:01:55 INFO]: Client> Exception in thread "main" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1
[18:01:55 INFO]: Client> 	at com.google.gson.Gson.fromJson(Gson.java:815)
[18:01:55 INFO]: Client> 	at com.google.gson.Gson.fromJson(Gson.java:768)
[18:01:55 INFO]: Client> 	at com.google.gson.Gson.fromJson(Gson.java:717)
[18:01:55 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:120)
[18:01:55 INFO]: Client> Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1
[18:01:55 INFO]: Client> 	at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:374)
[18:01:55 INFO]: Client> 	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:183)
[18:01:55 INFO]: Client> 	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145)
[18:01:55 INFO]: Client> 	at com.google.gson.Gson.fromJson(Gson.java:803)
[18:01:55 INFO]: Client> 	... 3 more
[18:01:55 ERROR]: Game ended with bad state (exit code 1)
[18:01:55 INFO]: Deleting C:\Users\conal\AppData\Roaming\.minecraft\versions\13w47c\13w47c-natives-80236825195396
[18:01:55 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[18:01:55 WARN]: Couldn't delete C:\Users\conal\AppData\Roaming\.minecraft\versions\13w47c\13w47c-natives-80236825195396 - scheduling for deletion upon exit