I will be posting the crash report in this text box.
and also for download

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 12/2/15 4:46 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at rx.a_(SourceFile:409)
at zo.a(SourceFile:1818)
at rx.a(SourceFile:1198)
at bbz.au(SourceFile:1435)
at bbz.ax(SourceFile:1934)
at bbz.aw(SourceFile:1752)
at bbz.s(SourceFile:1596)
at bbz.as(SourceFile:942)
at bbz.a(SourceFile:386)
at net.minecraft.client.main.Main.main(SourceFile:122)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at rx.a_(SourceFile:409)
at zo.a(SourceFile:1818)
at rx.a(SourceFile:1198)
at bbz.au(SourceFile:1435)
at bbz.ax(SourceFile:1934)
at bbz.aw(SourceFile:1752)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bmg['MikeAG'/159, l='MpServer', x=143.07, y=50.00, z=375.43]]
Chunk stats: MultiplayerChunkCache: 529, 529
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (85,64,132), Chunk: (at 5,4,4 in 5,8; contains blocks 80,0,128 to 95,255,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 294576 game time, 118023 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: 91 total; [xl['Armor Stand'/256, l='MpServer', x=199.50, y=72.00, z=447.50], xl['Armor Stand'/257, l='MpServer', x=203.50, y=72.00, z=447.50], xn['entity.ItemFrame.name'/258, l='MpServer', x=205.97, y=68.50, z=447.50], xn['entity.ItemFrame.name'/259, l='MpServer', x=203.97, y=68.50, z=445.50], xn['entity.ItemFrame.name'/260, l='MpServer', x=205.03, y=68.50, z=445.50], xl['Armor Stand'/261, l='MpServer', x=200.50, y=66.00, z=463.50], yc['entity.MinecartCommandBlock.name'/262, l='MpServer', x=222.50, y=1.06, z=372.50], wa['Sheep'/263, l='MpServer', x=211.09, y=71.00, z=370.19], zb['Skeleton'/264, l='MpServer', x=222.50, y=51.00, z=391.50], zb['Skeleton'/265, l='MpServer', x=214.50, y=38.00, z=413.50], zd['Spider'/267, l='MpServer', x=212.50, y=17.00, z=429.50], zb['Skeleton'/268, l='MpServer', x=213.50, y=39.00, z=419.50], zb['Skeleton'/270, l='MpServer', x=205.50, y=18.00, z=447.97], zb['Skeleton'/271, l='MpServer', x=209.50, y=17.00, z=437.50], zb['Skeleton'/536, l='MpServer', x=135.50, y=65.00, z=426.50], zb['Skeleton'/537, l='MpServer', x=134.50, y=65.00, z=425.50], bmg['MikeAG'/159, l='MpServer', x=143.07, y=50.00, z=375.43], vu['Cow'/41, l='MpServer', x=64.34, y=72.00, z=311.66], vy['Pig'/49, l='MpServer', x=82.84, y=70.00, z=298.13], zf['Zombie'/56, l='MpServer', x=107.50, y=71.00, z=311.50], zd['Spider'/57, l='MpServer', x=107.34, y=72.00, z=327.38], zb['Skeleton'/59, l='MpServer', x=106.69, y=72.00, z=329.63], vy['Pig'/66, l='MpServer', x=122.13, y=70.00, z=296.88], vy['Pig'/67, l='MpServer', x=127.00, y=71.00, z=314.94], vy['Pig'/68, l='MpServer', x=116.31, y=71.00, z=321.44], zb['Skeleton'/328, l='MpServer', x=219.66, y=67.00, z=450.56], vy['Pig'/75, l='MpServer', x=142.44, y=62.56, z=303.53], ze['Witch'/81, l='MpServer', x=154.19, y=68.00, z=315.34], yn['Creeper'/90, l='MpServer', x=172.50, y=15.00, z=295.50], zf['Zombie'/100, l='MpServer', x=187.09, y=66.00, z=306.31], yn['Creeper'/107, l='MpServer', x=201.81, y=64.00, z=315.22], yn['Creeper'/382, l='MpServer', x=110.50, y=25.00, z=417.50], zd['Spider'/385, l='MpServer', x=112.50, y=25.00, z=416.50], zb['Skeleton'/389, l='MpServer', x=213.50, y=67.00, z=434.50], yn['Creeper'/399, l='MpServer', x=77.25, y=68.00, z=453.47], xl['Armor Stand'/148, l='MpServer', x=261.50, y=63.00, z=282.50], xl['Armor Stand'/149, l='MpServer', x=259.50, y=63.00, z=274.50], vq['Bat'/420, l='MpServer', x=98.44, y=50.04, z=422.31], vq['Bat'/169, l='MpServer', x=69.84, y=21.91, z=363.08], vq['Bat'/171, l='MpServer', x=84.55, y=22.25, z=358.30], vy['Pig'/172, l='MpServer', x=68.50, y=77.00, z=377.09], vq['Bat'/429, l='MpServer', x=201.83, y=22.00, z=425.47], zf['Zombie'/173, l='MpServer', x=72.50, y=30.00, z=423.50], wa['Sheep'/174, l='MpServer', x=73.38, y=71.00, z=431.91], vq['Bat'/430, l='MpServer', x=200.66, y=19.85, z=415.32], vq['Bat'/431, l='MpServer', x=203.72, y=23.05, z=425.57], vq['Bat'/432, l='MpServer', x=201.80, y=21.08, z=415.39], vq['Bat'/433, l='MpServer', x=70.81, y=21.05, z=356.39], vq['Bat'/434, l='MpServer', x=209.25, y=19.10, z=437.59], wa['Sheep'/179, l='MpServer', x=82.16, y=75.00, z=394.69], wa['Sheep'/181, l='MpServer', x=102.09, y=74.00, z=395.22], yn['Creeper'/182, l='MpServer', x=106.97, y=70.00, z=405.44], yn['Creeper'/183, l='MpServer', x=99.50, y=48.00, z=416.50], wa['Sheep'/184, l='MpServer', x=98.53, y=63.00, z=446.84], zb['Skeleton'/193, l='MpServer', x=119.84, y=69.00, z=346.50], wa['Sheep'/194, l='MpServer', x=121.66, y=69.00, z=395.53], wa['Sheep'/195, l='MpServer', x=118.28, y=75.00, z=393.47], wa['Sheep'/196, l='MpServer', x=112.72, y=69.00, z=399.69], wa['Sheep'/197, l='MpServer', x=120.88, y=67.00, z=408.44], zf['Zombie'/453, l='MpServer', x=97.50, y=14.00, z=447.50], wa['Sheep'/198, l='MpServer', x=115.78, y=68.00, z=411.50], vq['Bat'/199, l='MpServer', x=129.77, y=24.17, z=418.07], wa['Sheep'/200, l='MpServer', x=113.75, y=67.00, z=423.25], wa['Sheep'/201, l='MpServer', x=125.63, y=43.00, z=446.94], zb['Skeleton'/202, l='MpServer', x=126.50, y=42.00, z=443.50], wa['Sheep'/203, l='MpServer', x=117.38, y=63.00, z=446.09], zb['Skeleton'/462, l='MpServer', x=145.50, y=66.00, z=443.50], zb['Skeleton'/207, l='MpServer', x=141.32, y=64.00, z=359.17], zb['Skeleton'/208, l='MpServer', x=135.50, y=63.00, z=361.66], yn['Creeper'/209, l='MpServer', x=127.63, y=64.00, z=380.91], wa['Sheep'/210, l='MpServer', x=128.81, y=42.00, z=442.47], zf['Zombie'/472, l='MpServer', x=110.50, y=70.00, z=301.50], zf['Zombie'/219, l='MpServer', x=148.38, y=64.00, z=414.84], vq['Bat'/221, l='MpServer', x=145.20, y=32.99, z=440.46], zf['Zombie'/222, l='MpServer', x=147.13, y=32.00, z=449.47], zb['Skeleton'/234, l='MpServer', x=160.69, y=68.00, z=336.22], zf['Zombie'/235, l='MpServer', x=163.50, y=64.00, z=424.50], zb['Skeleton'/236, l='MpServer', x=168.16, y=65.00, z=446.47], yn['Creeper'/241, l='MpServer', x=182.50, y=20.00, z=431.50], zf['Zombie'/242, l='MpServer', x=176.50, y=64.00, z=432.50], zd['Spider'/243, l='MpServer', x=178.50, y=64.00, z=437.97], zd['Spider'/244, l='MpServer', x=178.50, y=64.00, z=440.06], zb['Skeleton'/245, l='MpServer', x=176.50, y=64.00, z=434.50], xl['Armor Stand'/249, l='MpServer', x=195.50, y=70.00, z=346.50], zb['Skeleton'/250, l='MpServer', x=198.75, y=20.00, z=414.97], yn['Creeper'/506, l='MpServer', x=87.80, y=69.00, z=449.40], zd['Spider'/251, l='MpServer', x=196.50, y=20.00, z=414.50], yn['Creeper'/507, l='MpServer', x=86.50, y=68.00, z=443.50], vq['Bat'/252, l='MpServer', x=202.28, y=31.70, z=427.42], zf['Zombie'/254, l='MpServer', x=206.34, y=17.00, z=439.34], vq['Bat'/255, l='MpServer', x=200.75, y=40.75, z=432.25]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Non-integrated multiplayer server
Stacktrace:
at bkh.a(SourceFile:364)
at bbz.b(SourceFile:2496)
at bbz.a(SourceFile:400)
at net.minecraft.client.main.Main.main(SourceFile:122)

– System Details –
Details:
Minecraft Version: 15w49a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 90606664 bytes (86 MB) / 294002688 bytes (280 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 18, tallocated: 142
Launched Version: 15w49a
LWJGL: 2.9.4
OpenGL: GeForce GTX 670/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz