Hopper: java.lang.NullPointerException

java.lang.NullPointerException
	at ny.a(SourceFile:89)
	at ou.aL(SourceFile:396)
	at ou.z(SourceFile:222)
	at ov.z(SourceFile:128)
	at oc.o_(SourceFile:279)
	at ou.o_(SourceFile:1167)
	at ov.o_(SourceFile:169)
	at ud.o_(SourceFile:29)
	at act.a(SourceFile:1351)
	at act.g(SourceFile:1329)

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 9/5/13 5:45 PM
Description: Ticking entity

java.lang.NullPointerException
	at ny.a(SourceFile:89)
	at ou.aL(SourceFile:396)
	at ou.z(SourceFile:222)
	at ov.z(SourceFile:128)
	at oc.o_(SourceFile:279)
	at ou.o_(SourceFile:1167)
	at ov.o_(SourceFile:169)
	at ud.o_(SourceFile:29)
	at act.a(SourceFile:1351)
	at act.g(SourceFile:1329)
	at act.h(SourceFile:1236)
	at avx.m(SourceFile:1426)
	at avx.V(SourceFile:686)
	at avx.e(SourceFile:642)
	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 ny.a(SourceFile:89)
	at ou.aL(SourceFile:396)
	at ou.z(SourceFile:222)
	at ov.z(SourceFile:128)
	at oc.o_(SourceFile:279)
	at ou.o_(SourceFile:1167)
	at ov.o_(SourceFile:169)
	at ud.o_(SourceFile:29)
	at act.a(SourceFile:1351)
	at act.g(SourceFile:1329)

-- Entity being ticked --
Details:
	Entity Type: Giant (ub)
	Entity ID: 162469
	Entity Name: Giant
	Entity's Exact location: -1089.50, 67.00, -1423.50
	Entity's Block location: World: (-1090,67,-1424), Chunk: (at 14,4,0 in -69,-89; contains blocks -1104,0,-1424 to -1089,255,-1409), Region: (-3,-3; contains chunks -96,-96 to -65,-65, blocks -1536,0,-1536 to -1025,255,-1025)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at act.h(SourceFile:1236)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfg['PhovX'/13817, l='MpServer', x=-1089.13, y=68.62, z=-1430.51]]
	Chunk stats: MultiplayerChunkCache: 306, 306
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-567,64,89), Chunk: (at 9,4,9 in -36,5; contains blocks -576,0,80 to -561,255,95), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
	Level time: 46716 game time, 5504 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: 66 total; [sd['Bat'/160762, l='MpServer', x=-1018.16, y=42.89, z=-1376.66], tw['Creeper'/157597, l='MpServer', x=-1071.50, y=16.00, z=-1512.50], sd['Bat'/156623, l='MpServer', x=-1058.59, y=20.10, z=-1500.75], tw['Creeper'/162405, l='MpServer', x=-1138.66, y=39.00, z=-1372.44], un['Zombie'/158283, l='MpServer', x=-1037.50, y=43.00, z=-1367.50], ui['Skeleton'/162148, l='MpServer', x=-1058.50, y=16.00, z=-1433.19], ui['Skeleton'/157625, l='MpServer', x=-1018.50, y=36.00, z=-1510.50], un['Zombie'/160243, l='MpServer', x=-1070.31, y=30.00, z=-1484.31], sd['Bat'/153901, l='MpServer', x=-1019.53, y=50.10, z=-1371.72], un['Zombie'/160242, l='MpServer', x=-1069.41, y=31.00, z=-1483.97], sd['Bat'/160722, l='MpServer', x=-1106.67, y=12.63, z=-1370.05], tw['Creeper'/160232, l='MpServer', x=-1074.50, y=28.00, z=-1467.50], tw['Creeper'/160233, l='MpServer', x=-1072.50, y=28.00, z=-1469.50], tw['Creeper'/160234, l='MpServer', x=-1070.50, y=28.00, z=-1472.50], uk['Spider'/159993, l='MpServer', x=-1135.06, y=24.00, z=-1370.50], tw['Creeper'/158227, l='MpServer', x=-1058.50, y=27.00, z=-1497.50], sd['Bat'/160963, l='MpServer', x=-1022.53, y=46.05, z=-1360.94], un['Zombie'/158229, l='MpServer', x=-1062.50, y=27.00, z=-1495.50], un['Zombie'/158228, l='MpServer', x=-1062.50, y=27.00, z=-1497.50], un['Zombie'/160151, l='MpServer', x=-1060.03, y=16.00, z=-1457.50], un['Zombie'/160443, l='MpServer', x=-1108.50, y=17.00, z=-1379.50], sd['Bat'/159900, l='MpServer', x=-1037.14, y=43.59, z=-1369.44], ui['Skeleton'/160440, l='MpServer', x=-1105.50, y=17.00, z=-1374.50], sd['Bat'/159902, l='MpServer', x=-1044.40, y=42.25, z=-1360.70], un['Zombie'/157742, l='MpServer', x=-1097.50, y=14.00, z=-1424.50], ui['Skeleton'/158008, l='MpServer', x=-1091.47, y=16.00, z=-1425.16], sd['Bat'/153950, l='MpServer', x=-1038.53, y=46.95, z=-1373.56], sd['Bat'/156885, l='MpServer', x=-1155.66, y=38.10, z=-1403.25], un['Zombie'/161255, l='MpServer', x=-1059.50, y=18.00, z=-1429.50], sg['Phov'/153752, l='MpServer', x=-1104.91, y=64.00, z=-1440.75], un['Zombie'/162005, l='MpServer', x=-1148.50, y=30.00, z=-1424.50], un['Zombie'/160363, l='MpServer', x=-1132.50, y=26.00, z=-1395.50], un['Zombie'/160362, l='MpServer', x=-1131.50, y=26.00, z=-1398.50], un['Zombie'/160361, l='MpServer', x=-1132.50, y=26.00, z=-1400.50], ui['Skeleton'/160799, l='MpServer', x=-1158.53, y=24.00, z=-1417.16], tw['Creeper'/161332, l='MpServer', x=-1119.50, y=34.00, z=-1370.50], tj['item.tile.rail'/149372, l='MpServer', x=-1111.94, y=11.13, z=-1495.44], un['Zombie'/160116, l='MpServer', x=-1120.50, y=29.00, z=-1402.50], ui['Skeleton'/157501, l='MpServer', x=-1039.13, y=23.00, z=-1445.50], un['Zombie'/158150, l='MpServer', x=-1159.50, y=22.00, z=-1355.50], ui['Skeleton'/160800, l='MpServer', x=-1155.50, y=24.00, z=-1425.50], tw['Creeper'/157486, l='MpServer', x=-1120.28, y=34.00, z=-1373.84], tw['Creeper'/160106, l='MpServer', x=-1018.50, y=47.00, z=-1389.50], un['Zombie'/157895, l='MpServer', x=-1049.50, y=43.00, z=-1362.50], op['Experience Orb'/162190, l='MpServer', x=-1086.37, y=66.25, z=-1421.97], op['Experience Orb'/162188, l='MpServer', x=-1084.13, y=66.25, z=-1422.69], sd['Bat'/160292, l='MpServer', x=-1049.68, y=24.00, z=-1429.54], un['Zombie'/160569, l='MpServer', x=-1070.50, y=32.00, z=-1429.50], bfg['PhovX'/13817, l='MpServer', x=-1089.13, y=68.62, z=-1430.51], un['Zombie'/155564, l='MpServer', x=-1112.50, y=30.00, z=-1429.44], sd['Bat'/154618, l='MpServer', x=-1052.25, y=23.07, z=-1506.28], un['Zombie'/161400, l='MpServer', x=-1045.50, y=23.00, z=-1432.50], un['Zombie'/160551, l='MpServer', x=-1144.50, y=29.00, z=-1369.50], un['Zombie'/161401, l='MpServer', x=-1051.41, y=22.00, z=-1428.00], tw['Creeper'/161398, l='MpServer', x=-1046.50, y=23.00, z=-1434.50], tw['Creeper'/161399, l='MpServer', x=-1043.50, y=23.00, z=-1439.50], ub['Giant'/162469, l='MpServer', x=-1089.50, y=67.00, z=-1423.50], tj['item.tile.sand'/158390, l='MpServer', x=-1084.22, y=66.13, z=-1431.25], un['Zombie'/161968, l='MpServer', x=-1033.50, y=14.00, z=-1435.50], un['Zombie'/160515, l='MpServer', x=-1161.66, y=25.00, z=-1399.03], uk['Spider'/160514, l='MpServer', x=-1161.28, y=25.00, z=-1400.75], un['Zombie'/160521, l='MpServer', x=-1159.50, y=31.00, z=-1416.50], tw['Creeper'/162436, l='MpServer', x=-1167.50, y=30.00, z=-1420.50], ui['Skeleton'/162437, l='MpServer', x=-1166.50, y=30.00, z=-1426.50], tw['Creeper'/160524, l='MpServer', x=-1165.50, y=34.00, z=-1405.50], un['Zombie'/161953, l='MpServer', x=-1127.50, y=30.00, z=-1375.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfb.a(SourceFile:285)
	at avx.b(SourceFile:1813)
	at avx.e(SourceFile:651)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 247194920 bytes (235 MB) / 620494848 bytes (591 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 805 (45080 bytes; 0 MB) allocated, 788 (44128 bytes; 0 MB) used
	Suspicious classes: [com.ibm.icu.text.ArabicShapingException], [gnu.trove.TIntCollection], [gnu.trove.impl.HashFunctions, PrimeFinder], [gnu.trove.impl.hash.THash, TPrimitiveHash, TIntIntHash], [gnu.trove.iterator.TIterator, TAdvancingIterator, TIntIntIterator], [gnu.trove.map.TIntIntMap], [gnu.trove.map.hash.TIntIntHashMap], [gnu.trove.procedure.TIntIntProcedure], [gnu.trove.set.TIntSet]
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 13w36a
	LWJGL: 2.9.0
	OpenGL: ATI Radeon HD 5700 Series GL version 4.2.12217 Compatibility Profile Context 12.104.0.0, 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: 208 (11648 bytes; 0 MB) allocated, 145 (8120 bytes; 0 MB) used