Minecraft crashed

Deserializing Message

java.lang.ClassCastException: com.google.gson.JsonPrimitive cannot be cast to com.google.gson.JsonObject
	at cw.a(SourceFile:14)
	at cw.deserialize(SourceFile:10)
	at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
	at com.google.gson.Gson.fromJson(Gson.java:795)
	at com.google.gson.Gson.fromJson(Gson.java:761)
	at com.google.gson.Gson.fromJson(Gson.java:710)
	at com.google.gson.Gson.fromJson(Gson.java:682)
	at cu.c(SourceFile:220)
	at bcn.a(SourceFile:518)
	at dl.a(SourceFile:49)
	at cn.b(SourceFile:350)
	at bcn.d(SourceFile:95)
	at bcu.b(SourceFile:60)
	at atn.k(SourceFile:1380)
	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:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at cw.a(SourceFile:14)
	at cw.deserialize(SourceFile:10)
	at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
	at com.google.gson.Gson.fromJson(Gson.java:795)
	at com.google.gson.Gson.fromJson(Gson.java:761)
	at com.google.gson.Gson.fromJson(Gson.java:710)
	at com.google.gson.Gson.fromJson(Gson.java:682)

-- Serialized Message --
Details:
	JSON string: Cannot send chat message.
Stacktrace:
	at cu.c(SourceFile:220)
	at bcn.a(SourceFile:518)
	at dl.a(SourceFile:49)
	at cn.b(SourceFile:350)
	at bcn.d(SourceFile:95)

-- Affected level --
Details:
	Level name: MpServer
	All players: 10 total; [bcx['alex_s1808'/1160, l='MpServer', x=262.55, y=84.62, z=40.94], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (262,83,39), Chunk: (at 6,5,7 in 16,2; contains blocks 256,0,32 to 271,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 10082496 game time, 11210292 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 19 total; [ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28], bcx['alex_s1808'/1160, l='MpServer', x=262.55, y=84.62, z=40.94], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36]]
	Retry entities: 0 total; []
Stacktrace:
	at bcu.a(SourceFile:284)
	at atn.k(SourceFile:1387)
	at atn.S(SourceFile:662)
	at atn.d(SourceFile:618)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- Affected level --
Details:
	Level name: MpServer
	All players: 10 total; [bcx['alex_s1808'/1160, l='MpServer', x=262.55, y=84.62, z=40.94], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (262,83,39), Chunk: (at 6,5,7 in 16,2; contains blocks 256,0,32 to 271,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 10082496 game time, 11210292 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 19 total; [ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28], bcx['alex_s1808'/1160, l='MpServer', x=262.55, y=84.62, z=40.94], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Cameronyouil'/1155, l='MpServer', x=260.75, y=83.00, z=39.47], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['itz_sestan'/1159, l='MpServer', x=264.16, y=83.00, z=39.44], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['mikfotball'/1158, l='MpServer', x=284.69, y=84.00, z=22.41], ben['ButterKnight50'/1154, l='MpServer', x=257.39, y=83.00, z=23.96], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['gayarre'/1157, l='MpServer', x=284.88, y=83.78, z=21.41], ben['Pack5751'/1153, l='MpServer', x=291.91, y=83.00, z=63.49], ben['RedSox12399'/1152, l='MpServer', x=252.28, y=83.16, z=23.28], ben['wrestler_joel'/1151, l='MpServer', x=277.66, y=83.00, z=24.25], ben['Clarkyyyy'/1150, l='MpServer', x=262.72, y=83.98, z=45.36]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 23425248 bytes (22 MB) / 106217472 bytes (101 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 16967 (950152 bytes; 0 MB) allocated, 43 (2408 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 6320 Graphics     GL version 4.1.10834 Compatibility Profile Context, 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: 462 (25872 bytes; 0 MB) allocated, 23 (1288 bytes; 0 MB) used