Hopper: java.lang.NullPointerException: Rendering screen

java.lang.NullPointerException: Rendering screen
	at bsl.a(SourceFile:306)
	at bsl.a(SourceFile:112)
	at bsr.a(SourceFile:191)
	at azp.a(SourceFile:793)
	at bcd.b(SourceFile:101)
	at bag.a(SourceFile:60)
	at bbw.a(SourceFile:42)
	at bcc.a(SourceFile:61)

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 10/17/13 3:55 PM
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
	at bsl.a(SourceFile:306)
	at bsl.a(SourceFile:112)
	at bsr.a(SourceFile:191)
	at azp.a(SourceFile:793)
	at bcd.b(SourceFile:101)
	at bag.a(SourceFile:60)
	at bbw.a(SourceFile:42)
	at bcc.a(SourceFile:61)
	at blc.b(SourceFile:850)
	at ayw.ac(SourceFile:776)
	at ayw.e(SourceFile:700)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at bsl.a(SourceFile:306)
	at bsl.a(SourceFile:112)
	at bsr.a(SourceFile:191)
	at azp.a(SourceFile:793)
	at bcd.b(SourceFile:101)
	at bag.a(SourceFile:60)
	at bbw.a(SourceFile:42)
	at bcc.a(SourceFile:61)

-- Screen render details --
Details:
	Screen name: bcc
	Mouse location: Scaled: (321, 84). Absolute: (642, 310)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [biw['Kevlar98'/630, l='MpServer', x=527.06, y=76.62, z=764.59]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 20244868 game time, 10495320 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: 135 total; [wu['Skeleton'/821, l='MpServer', x=564.06, y=63.00, z=793.56], biw['Kevlar98'/630, l='MpServer', x=527.06, y=76.62, z=764.59], uq['Cow'/820, l='MpServer', x=560.03, y=74.00, z=757.88], wi['Creeper'/823, l='MpServer', x=571.50, y=77.00, z=829.50], wz['Zombie'/822, l='MpServer', x=566.41, y=64.00, z=789.94], uq['Cow'/817, l='MpServer', x=560.91, y=74.00, z=763.16], uq['Cow'/816, l='MpServer', x=560.91, y=74.00, z=758.34], uq['Cow'/819, l='MpServer', x=559.25, y=74.00, z=759.21], ur['Horse'/818, l='MpServer', x=560.03, y=74.00, z=764.66], vv['entity.MinecartChest.name'/829, l='MpServer', x=590.50, y=32.50, z=693.50], uy['Sheep'/831, l='MpServer', x=593.28, y=73.00, z=707.81], uy['Sheep'/830, l='MpServer', x=589.22, y=73.00, z=701.78], ux['Pig'/824, l='MpServer', x=570.06, y=84.00, z=835.28], uq['Cow'/804, l='MpServer', x=560.22, y=74.00, z=759.52], uq['Cow'/805, l='MpServer', x=560.09, y=74.00, z=760.67], ux['Pig'/806, l='MpServer', x=559.97, y=88.00, z=840.31], uq['Cow'/800, l='MpServer', x=557.88, y=74.00, z=759.11], uq['Cow'/801, l='MpServer', x=558.61, y=74.00, z=757.88], uq['Cow'/802, l='MpServer', x=557.88, y=74.00, z=764.54], uq['Cow'/803, l='MpServer', x=559.34, y=74.00, z=757.88], vv['entity.MinecartChest.name'/812, l='MpServer', x=560.50, y=32.50, z=696.47], wu['Skeleton'/813, l='MpServer', x=569.50, y=59.00, z=699.88], ux['Pig'/814, l='MpServer', x=564.50, y=72.00, z=712.03], wz['Zombie'/815, l='MpServer', x=572.50, y=34.00, z=744.50], up['Chicken'/788, l='MpServer', x=534.53, y=57.00, z=763.53], ux['Pig'/787, l='MpServer', x=541.50, y=81.00, z=721.50], ux['Pig'/786, l='MpServer', x=538.50, y=81.00, z=720.50], ux['Pig'/785, l='MpServer', x=535.50, y=98.00, z=692.50], uq['Cow'/799, l='MpServer', x=558.45, y=74.00, z=758.52], uq['Cow'/798, l='MpServer', x=558.09, y=74.00, z=761.37], uq['Cow'/797, l='MpServer', x=558.11, y=74.00, z=763.51], uq['Cow'/796, l='MpServer', x=558.39, y=74.00, z=760.12], uq['Cow'/795, l='MpServer', x=558.09, y=74.00, z=762.51], uq['Cow'/794, l='MpServer', x=557.88, y=74.00, z=757.88], wu['Skeleton'/793, l='MpServer', x=547.50, y=42.00, z=751.09], ux['Pig'/792, l='MpServer', x=554.47, y=68.00, z=724.06], un['Bat'/774, l='MpServer', x=518.47, y=22.74, z=779.40], un['Bat'/775, l='MpServer', x=519.41, y=23.77, z=783.20], wz['Zombie'/772, l='MpServer', x=505.88, y=42.00, z=745.56], xl['arrow'/773, l='MpServer', x=512.75, y=12.03, z=775.97], ux['Pig'/770, l='MpServer', x=510.50, y=90.00, z=685.55], uy['Sheep'/771, l='MpServer', x=522.34, y=64.00, z=725.75], uy['Sheep'/864, l='MpServer', x=599.47, y=66.00, z=731.34], wv['Slime'/865, l='MpServer', x=605.69, y=14.00, z=743.30], wz['Zombie'/866, l='MpServer', x=595.69, y=12.91, z=745.69], ux['Pig'/867, l='MpServer', x=598.97, y=62.18, z=744.03], ux['Pig'/868, l='MpServer', x=605.50, y=85.00, z=783.50], rc['entity.ItemFrame.name'/631, l='MpServer', x=525.06, y=76.50, z=764.50], ux['Pig'/869, l='MpServer', x=605.50, y=85.00, z=783.50], wu['Skeleton'/870, l='MpServer', x=599.50, y=79.00, z=790.50], un['Bat'/871, l='MpServer', x=610.39, y=54.91, z=810.36], ww['Spider'/872, l='MpServer', x=606.28, y=33.00, z=844.88], un['Bat'/873, l='MpServer', x=605.47, y=57.10, z=839.38], rc['entity.ItemFrame.name'/633, l='MpServer', x=525.06, y=76.50, z=765.50], rc['entity.ItemFrame.name'/632, l='MpServer', x=525.06, y=77.50, z=765.50], uy['Sheep'/859, l='MpServer', x=601.25, y=63.00, z=719.84], vv['entity.MinecartChest.name'/858, l='MpServer', x=596.47, y=37.34, z=704.47], uy['Sheep'/857, l='MpServer', x=595.13, y=75.00, z=694.22], uy['Sheep'/856, l='MpServer', x=595.66, y=83.00, z=685.50], uy['Sheep'/863, l='MpServer', x=599.41, y=63.00, z=733.84], uy['Sheep'/862, l='MpServer', x=597.75, y=68.00, z=711.66], uy['Sheep'/861, l='MpServer', x=606.78, y=71.00, z=705.44], uy['Sheep'/860, l='MpServer', x=603.34, y=64.00, z=717.44], ux['Pig'/834, l='MpServer', x=584.50, y=74.00, z=715.84], vt['item.item.arrow'/835, l='MpServer', x=576.38, y=74.13, z=706.25], vv['entity.MinecartChest.name'/832, l='MpServer', x=579.47, y=29.34, z=707.19], un['Bat'/833, l='MpServer', x=592.84, y=38.30, z=714.69], vv['entity.MinecartChest.name'/838, l='MpServer', x=579.50, y=36.34, z=733.47], wz['Zombie'/839, l='MpServer', x=585.31, y=34.00, z=745.09], vt['item.item.bone'/836, l='MpServer', x=577.50, y=74.13, z=706.50], vt['item.item.rottenFlesh'/837, l='MpServer', x=587.59, y=64.13, z=717.47], wz['Zombie'/842, l='MpServer', x=579.00, y=86.00, z=828.75], wu['Skeleton'/843, l='MpServer', x=581.06, y=86.00, z=829.47], wj['Enderman'/840, l='MpServer', x=580.50, y=34.00, z=745.16], wu['Skeleton'/841, l='MpServer', x=578.72, y=82.00, z=816.41], ux['Pig'/844, l='MpServer', x=582.50, y=94.00, z=837.50], ux['Pig'/845, l='MpServer', x=583.50, y=94.00, z=839.50], uy['Sheep'/687, l='MpServer', x=463.94, y=64.00, z=731.09], uy['Sheep'/702, l='MpServer', x=450.50, y=71.00, z=828.34], ux['Pig'/703, l='MpServer', x=453.91, y=79.00, z=824.88], ux['Pig'/700, l='MpServer', x=457.50, y=73.00, z=830.50], ux['Pig'/701, l='MpServer', x=457.50, y=72.00, z=831.50], up['Chicken'/699, l='MpServer', x=461.44, y=83.00, z=801.56], wu['Skeleton'/696, l='MpServer', x=449.97, y=32.00, z=803.50], uy['Sheep'/697, l='MpServer', x=463.91, y=69.00, z=813.53], uq['Cow'/694, l='MpServer', x=459.53, y=80.00, z=791.53], wu['Skeleton'/695, l='MpServer', x=451.31, y=31.00, z=804.31], wz['Zombie'/692, l='MpServer', x=455.00, y=72.00, z=778.44], wi['Creeper'/693, l='MpServer', x=453.50, y=30.00, z=796.50], wu['Skeleton'/690, l='MpServer', x=452.91, y=47.00, z=774.47], wu['Skeleton'/691, l='MpServer', x=459.50, y=46.00, z=775.50], wz['Zombie'/688, l='MpServer', x=456.31, y=64.00, z=740.50], wu['Skeleton'/689, l='MpServer', x=454.50, y=46.00, z=776.50], un['Bat'/903, l='MpServer', x=607.41, y=59.10, z=840.63], ux['Pig'/745, l='MpServer', x=494.88, y=72.00, z=825.97], up['Chicken'/744, l='MpServer', x=491.50, y=79.00, z=810.50], wz['Zombie'/751, l='MpServer', x=504.50, y=44.00, z=747.03], uy['Sheep'/739, l='MpServer', x=495.22, y=63.00, z=706.09], un['Bat'/743, l='MpServer', x=477.11, y=26.00, z=814.29], wi['Creeper'/742, l='MpServer', x=481.47, y=51.00, z=783.00], wu['Skeleton'/741, l='MpServer', x=486.78, y=28.00, z=775.72], wi['Creeper'/740, l='MpServer', x=483.50, y=11.00, z=749.50], wz['Zombie'/760, l='MpServer', x=507.50, y=30.00, z=800.50], wz['Zombie'/761, l='MpServer', x=500.50, y=17.00, z=830.50], wu['Skeleton'/754, l='MpServer', x=498.44, y=17.00, z=771.15], wu['Skeleton'/755, l='MpServer', x=502.53, y=21.00, z=777.06], wz['Zombie'/752, l='MpServer', x=504.50, y=42.00, z=740.50], un['Bat'/753, l='MpServer', x=506.52, y=43.55, z=749.65], un['Bat'/758, l='MpServer', x=503.94, y=23.85, z=787.83], wz['Zombie'/759, l='MpServer', x=507.50, y=30.00, z=801.50], un['Bat'/756, l='MpServer', x=517.43, y=23.00, z=783.15], wu['Skeleton'/757, l='MpServer', x=505.61, y=17.00, z=790.50], un['Bat'/713, l='MpServer', x=474.24, y=15.74, z=754.40], wu['Skeleton'/715, l='MpServer', x=476.50, y=16.00, z=758.50], wu['Skeleton'/714, l='MpServer', x=474.41, y=14.00, z=753.13], un['Bat'/717, l='MpServer', x=475.39, y=45.74, z=804.86], wz['Zombie'/716, l='MpServer', x=466.50, y=46.00, z=783.50], wz['Zombie'/719, l='MpServer', x=467.69, y=33.00, z=790.41], uy['Sheep'/718, l='MpServer', x=478.81, y=66.00, z=782.09], ux['Pig'/728, l='MpServer', x=474.47, y=79.00, z=802.50], ux['Pig'/729, l='MpServer', x=475.53, y=79.00, z=802.50], wi['Creeper'/730, l='MpServer', x=473.50, y=38.00, z=823.50], wi['Creeper'/731, l='MpServer', x=464.50, y=44.00, z=830.50], wz['Zombie'/732, l='MpServer', x=466.50, y=44.00, z=831.50], ux['Pig'/733, l='MpServer', x=469.75, y=73.00, z=817.50], wz['Zombie'/734, l='MpServer', x=468.50, y=44.00, z=833.50], ux['Pig'/735, l='MpServer', x=475.50, y=76.00, z=840.69], wz['Zombie'/720, l='MpServer', x=467.13, y=33.00, z=791.41], wi['Creeper'/721, l='MpServer', x=476.72, y=41.00, z=797.00], wi['Creeper'/722, l='MpServer', x=470.50, y=46.00, z=785.50], wz['Zombie'/723, l='MpServer', x=469.81, y=46.00, z=786.84], un['Bat'/724, l='MpServer', x=474.00, y=28.10, z=798.75], wi['Creeper'/725, l='MpServer', x=465.50, y=32.00, z=812.50], wi['Creeper'/726, l='MpServer', x=470.03, y=32.00, z=813.53], un['Bat'/727, l='MpServer', x=470.83, y=53.83, z=814.46]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bir.a(SourceFile:284)
	at ayw.b(SourceFile:1928)
	at ayw.e(SourceFile:709)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w42a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 79127824 bytes (75 MB) / 285671424 bytes (272 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 22718 (1272208 bytes; 1 MB) allocated, 3796 (212576 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w42a
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 7900 Series GL version 4.2.11762 Compatibility Profile Context, ATI Technologies Inc.
	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)
	Vec3 Pool Size: 2930 (164080 bytes; 0 MB) allocated, 615 (34440 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)