I was playing on a sky blocks server and it was working fine, i was chatting fine.

Suddenly when i typed "Who Sells Glowstone" the game crashed. I reopened and tried again, it crashed again.

Below is the info:

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 7/4/13 9:52 PM
Description: 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: 4 total; [bcx['Andre_the_lord'/15521040, l='MpServer', x=-4194.18, y=136.62, z=2430.17], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (1703,2,927), Chunk: (at 7,0,15 in 106,57; contains blocks 1696,0,912 to 1711,255,927), Region: (3,1; contains chunks 96,32 to 127,63, blocks 1536,0,512 to 2047,255,1023)
Level time: 59769381 game time, 61560883 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: 51 total; [bcx['Andre_the_lord'/15521040, l='MpServer', x=-4194.18, y=136.62, z=2430.17], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13], tt['Zombie'/15507550, l='MpServer', x=-4149.50, y=125.00, z=2421.50], oa['entity.ItemFrame.name'/15416738, l='MpServer', x=-4180.50, y=121.50, z=2426.06], oa['entity.ItemFrame.name'/15416739, l='MpServer', x=-4181.06, y=121.50, z=2425.50], oa['entity.ItemFrame.name'/15416736, l='MpServer', x=-4178.50, y=121.50, z=2428.06], oa['entity.ItemFrame.name'/15416737, l='MpServer', x=-4179.50, y=121.50, z=2427.06], sc['Patches'/15416740, l='MpServer', x=-4186.69, y=121.00, z=2422.30], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], oa['entity.ItemFrame.name'/15416713, l='MpServer', x=-4165.50, y=123.50, z=2434.94], rn['Chicken'/15416714, l='MpServer', x=-4179.77, y=121.00, z=2424.47], oa['entity.ItemFrame.name'/15416579, l='MpServer', x=-4188.06, y=137.50, z=2442.50], rn['Chicken'/15416578, l='MpServer', x=-4181.63, y=121.88, z=2449.39], rn['Chicken'/15416715, l='MpServer', x=-4184.22, y=121.00, z=2458.56], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], oa['entity.ItemFrame.name'/15416581, l='MpServer', x=-4188.06, y=137.50, z=2434.50], rn['Chicken'/15416716, l='MpServer', x=-4184.22, y=121.00, z=2457.78], oa['entity.ItemFrame.name'/15416580, l='MpServer', x=-4188.06, y=137.50, z=2440.50], rn['Chicken'/15416717, l='MpServer', x=-4183.56, y=121.00, z=2458.47], oa['entity.ItemFrame.name'/15416583, l='MpServer', x=-4190.94, y=137.50, z=2434.50], uc['arrow'/15416718, l='MpServer', x=-4176.97, y=121.44, z=2454.00], oa['entity.ItemFrame.name'/15416582, l='MpServer', x=-4188.06, y=137.50, z=2438.50], oa['entity.ItemFrame.name'/15416719, l='MpServer', x=-4200.94, y=126.50, z=2431.50], oa['entity.ItemFrame.name'/15416585, l='MpServer', x=-4190.94, y=137.50, z=2440.50], oa['entity.ItemFrame.name'/15416584, l='MpServer', x=-4190.94, y=137.50, z=2436.50], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13], oa['entity.ItemFrame.name'/15416587, l='MpServer', x=-4188.06, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416586, l='MpServer', x=-4190.94, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416588, l='MpServer', x=-4190.94, y=137.50, z=2438.50], oa['entity.ItemFrame.name'/15416729, l='MpServer', x=-4194.50, y=137.50, z=2445.94], oa['entity.ItemFrame.name'/15416728, l='MpServer', x=-4195.94, y=137.50, z=2440.50], oa['entity.ItemFrame.name'/15416731, l='MpServer', x=-4193.06, y=137.50, z=2444.50], oa['entity.ItemFrame.name'/15416730, l='MpServer', x=-4195.94, y=137.50, z=2444.50], oa['entity.ItemFrame.name'/15416733, l='MpServer', x=-4193.06, y=137.50, z=2438.50], tt['Zombie'/15489989, l='MpServer', x=-4149.50, y=125.00, z=2417.50], oa['entity.ItemFrame.name'/15416732, l='MpServer', x=-4195.94, y=137.50, z=2434.50], sc['Wolfy'/15416735, l='MpServer', x=-4186.69, y=121.00, z=2422.70], oa['entity.ItemFrame.name'/15416734, l='MpServer', x=-4179.50, y=126.50, z=2427.06], to['Skeleton'/15494778, l='MpServer', x=-4150.50, y=125.00, z=2419.50], oa['entity.ItemFrame.name'/15416721, l='MpServer', x=-4193.06, y=137.50, z=2434.50], oa['entity.ItemFrame.name'/15416720, l='MpServer', x=-4194.50, y=126.50, z=2433.94], oa['entity.ItemFrame.name'/15416723, l='MpServer', x=-4193.06, y=137.50, z=2440.50], to['Skeleton'/15494776, l='MpServer', x=-4149.50, y=125.00, z=2415.50], to['Skeleton'/15494777, l='MpServer', x=-4149.50, y=125.00, z=2419.50], oa['entity.ItemFrame.name'/15416722, l='MpServer', x=-4193.06, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416725, l='MpServer', x=-4195.94, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416724, l='MpServer', x=-4193.06, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416727, l='MpServer', x=-4195.94, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416726, l='MpServer', x=-4195.94, y=137.50, z=2438.50]]
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: 4 total; [bcx['Andre_the_lord'/15521040, l='MpServer', x=-4194.18, y=136.62, z=2430.17], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (1703,2,927), Chunk: (at 7,0,15 in 106,57; contains blocks 1696,0,912 to 1711,255,927), Region: (3,1; contains chunks 96,32 to 127,63, blocks 1536,0,512 to 2047,255,1023)
Level time: 59769381 game time, 61560883 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: 51 total; [bcx['Andre_the_lord'/15521040, l='MpServer', x=-4194.18, y=136.62, z=2430.17], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13], tt['Zombie'/15507550, l='MpServer', x=-4149.50, y=125.00, z=2421.50], oa['entity.ItemFrame.name'/15416738, l='MpServer', x=-4180.50, y=121.50, z=2426.06], oa['entity.ItemFrame.name'/15416739, l='MpServer', x=-4181.06, y=121.50, z=2425.50], oa['entity.ItemFrame.name'/15416736, l='MpServer', x=-4178.50, y=121.50, z=2428.06], oa['entity.ItemFrame.name'/15416737, l='MpServer', x=-4179.50, y=121.50, z=2427.06], sc['Patches'/15416740, l='MpServer', x=-4186.69, y=121.00, z=2422.30], ben['Faizan_A'/13969396, l='MpServer', x=-4194.75, y=135.00, z=2443.47], oa['entity.ItemFrame.name'/15416713, l='MpServer', x=-4165.50, y=123.50, z=2434.94], rn['Chicken'/15416714, l='MpServer', x=-4179.77, y=121.00, z=2424.47], oa['entity.ItemFrame.name'/15416579, l='MpServer', x=-4188.06, y=137.50, z=2442.50], rn['Chicken'/15416578, l='MpServer', x=-4181.63, y=121.88, z=2449.39], rn['Chicken'/15416715, l='MpServer', x=-4184.22, y=121.00, z=2458.56], ben['budbud9876'/13318391, l='MpServer', x=-4193.31, y=135.00, z=2435.75], oa['entity.ItemFrame.name'/15416581, l='MpServer', x=-4188.06, y=137.50, z=2434.50], rn['Chicken'/15416716, l='MpServer', x=-4184.22, y=121.00, z=2457.78], oa['entity.ItemFrame.name'/15416580, l='MpServer', x=-4188.06, y=137.50, z=2440.50], rn['Chicken'/15416717, l='MpServer', x=-4183.56, y=121.00, z=2458.47], oa['entity.ItemFrame.name'/15416583, l='MpServer', x=-4190.94, y=137.50, z=2434.50], uc['arrow'/15416718, l='MpServer', x=-4176.97, y=121.44, z=2454.00], oa['entity.ItemFrame.name'/15416582, l='MpServer', x=-4188.06, y=137.50, z=2438.50], oa['entity.ItemFrame.name'/15416719, l='MpServer', x=-4200.94, y=126.50, z=2431.50], oa['entity.ItemFrame.name'/15416585, l='MpServer', x=-4190.94, y=137.50, z=2440.50], oa['entity.ItemFrame.name'/15416584, l='MpServer', x=-4190.94, y=137.50, z=2436.50], ben['MinecraftDonut11'/14937746, l='MpServer', x=-4195.72, y=135.88, z=2439.13], oa['entity.ItemFrame.name'/15416587, l='MpServer', x=-4188.06, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416586, l='MpServer', x=-4190.94, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416588, l='MpServer', x=-4190.94, y=137.50, z=2438.50], oa['entity.ItemFrame.name'/15416729, l='MpServer', x=-4194.50, y=137.50, z=2445.94], oa['entity.ItemFrame.name'/15416728, l='MpServer', x=-4195.94, y=137.50, z=2440.50], oa['entity.ItemFrame.name'/15416731, l='MpServer', x=-4193.06, y=137.50, z=2444.50], oa['entity.ItemFrame.name'/15416730, l='MpServer', x=-4195.94, y=137.50, z=2444.50], oa['entity.ItemFrame.name'/15416733, l='MpServer', x=-4193.06, y=137.50, z=2438.50], tt['Zombie'/15489989, l='MpServer', x=-4149.50, y=125.00, z=2417.50], oa['entity.ItemFrame.name'/15416732, l='MpServer', x=-4195.94, y=137.50, z=2434.50], sc['Wolfy'/15416735, l='MpServer', x=-4186.69, y=121.00, z=2422.70], oa['entity.ItemFrame.name'/15416734, l='MpServer', x=-4179.50, y=126.50, z=2427.06], to['Skeleton'/15494778, l='MpServer', x=-4150.50, y=125.00, z=2419.50], oa['entity.ItemFrame.name'/15416721, l='MpServer', x=-4193.06, y=137.50, z=2434.50], oa['entity.ItemFrame.name'/15416720, l='MpServer', x=-4194.50, y=126.50, z=2433.94], oa['entity.ItemFrame.name'/15416723, l='MpServer', x=-4193.06, y=137.50, z=2440.50], to['Skeleton'/15494776, l='MpServer', x=-4149.50, y=125.00, z=2415.50], to['Skeleton'/15494777, l='MpServer', x=-4149.50, y=125.00, z=2419.50], oa['entity.ItemFrame.name'/15416722, l='MpServer', x=-4193.06, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416725, l='MpServer', x=-4195.94, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416724, l='MpServer', x=-4193.06, y=137.50, z=2442.50], oa['entity.ItemFrame.name'/15416727, l='MpServer', x=-4195.94, y=137.50, z=2436.50], oa['entity.ItemFrame.name'/15416726, l='MpServer', x=-4195.94, y=137.50, z=2438.50]]
Retry entities: 0 total; []

– System Details –
Details:
Minecraft Version: 1.6.1
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 56878448 bytes (54 MB) / 122728448 bytes (117 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 21699 (1215144 bytes; 1 MB) allocated, 170 (9520 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: Intel HD Graphics 3000 OpenGL Engine GL version 2.1 APPLE-7.32.12, Intel 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: 509 (28504 bytes; 0 MB) allocated, 42 (2352 bytes; 0 MB) used