This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-1574619/
Crash:
java.lang.IllegalArgumentException: Duplicate id value for 3!
at ve.a(SourceFile:67)
at ut.c(SourceFile:38)
at ub.<init>(SourceFile:152)
at us.<init>(SourceFile:25)
at us.<init>(SourceFile:30)
at ut.<init>(SourceFile:31)
at ags.a(SourceFile:46)
at ags.a(SourceFile:32)
at ahk.a(SourceFile:122)
at bwa.a(SourceFile:312)
at bjs.aj(SourceFile:1301)
The following is the first clean report made public about this crash:
---- Minecraft Crash Report ----
// Why is it breaking :(
Time: 5/22/14 9:52 AM
Description: Unexpected error
java.lang.IllegalArgumentException: Duplicate id value for 3!
at ve.a(SourceFile:67)
at ut.c(SourceFile:38)
at ub.<init>(SourceFile:152)
at us.<init>(SourceFile:25)
at us.<init>(SourceFile:30)
at ut.<init>(SourceFile:31)
at ags.a(SourceFile:46)
at ags.a(SourceFile:32)
at ahk.a(SourceFile:122)
at bwa.a(SourceFile:312)
at bjs.aj(SourceFile:1301)
at bjs.p(SourceFile:1660)
at bjs.ah(SourceFile:843)
at bjs.f(SourceFile:797)
at net.minecraft.client.main.Main.main(SourceFile:121)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at ve.a(SourceFile:67)
at ut.c(SourceFile:38)
at ub.<init>(SourceFile:152)
at us.<init>(SourceFile:25)
at us.<init>(SourceFile:30)
at ut.<init>(SourceFile:31)
at ags.a(SourceFile:46)
at ags.a(SourceFile:32)
at ahk.a(SourceFile:122)
at bwa.a(SourceFile:312)
at bjs.aj(SourceFile:1301)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bzw['keyl1'/81, l='MpServer', x=-518.17, y=4.00, z=780.46]]
Chunk stats: MultiplayerChunkCache: 169, 169
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: -462.00,4.00,888.00 - World: (-462,4,888), Chunk: (at 2,0,8 in -29,55; contains blocks -464,0,880 to -449,255,895), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
Level time: 292477 game time, 292477 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 30 total; [abm['Slime'/65, l='MpServer', x=-443.41, y=4.00, z=706.15], abm['Slime'/66, l='MpServer', x=-442.07, y=4.00, z=728.01], yv['Pig'/67, l='MpServer', x=-441.88, y=4.00, z=769.56], yn['Cow'/21, l='MpServer', x=-592.88, y=4.00, z=799.06], yn['Cow'/22, l='MpServer', x=-595.31, y=4.00, z=788.50], yn['Cow'/25, l='MpServer', x=-576.69, y=4.00, z=804.75], ym['Chicken'/29, l='MpServer', x=-570.47, y=4.00, z=828.28], zs['item.item.bone'/31, l='MpServer', x=-566.63, y=4.00, z=817.94], zs['item.item.arrow'/30, l='MpServer', x=-566.31, y=4.00, z=818.84], abm['Slime'/35, l='MpServer', x=-550.38, y=4.00, z=715.83], zs['item.item.egg'/32, l='MpServer', x=-570.63, y=4.00, z=828.53], zs['item.item.bone'/38, l='MpServer', x=-557.63, y=4.00, z=836.44], bzw['keyl1'/81, l='MpServer', x=-518.17, y=4.00, z=780.46], yw['Sheep'/36, l='MpServer', x=-542.19, y=5.00, z=794.47], zs['item.item.arrow'/37, l='MpServer', x=-557.25, y=4.00, z=835.66], yn['Cow'/43, l='MpServer', x=-535.91, y=4.00, z=783.97], zs['item.item.bone'/46, l='MpServer', x=-536.19, y=4.00, z=804.66], yw['Sheep'/47, l='MpServer', x=-530.13, y=4.00, z=827.88], zs['item.item.rottenFlesh'/44, l='MpServer', x=-534.47, y=4.00, z=811.22], zs['item.item.arrow'/45, l='MpServer', x=-536.69, y=4.00, z=805.06], yw['Sheep'/48, l='MpServer', x=-516.06, y=5.00, z=796.88], yw['Sheep'/53, l='MpServer', x=-509.84, y=4.00, z=831.75], zs['item.item.arrow'/52, l='MpServer', x=-502.59, y=4.00, z=802.09], ym['Chicken'/59, l='MpServer', x=-476.38, y=4.00, z=816.16], ym['Chicken'/58, l='MpServer', x=-469.75, y=4.00, z=798.44], zs['item.item.egg'/57, l='MpServer', x=-475.97, y=4.00, z=790.97], ym['Chicken'/56, l='MpServer', x=-476.69, y=4.00, z=791.63], ym['Chicken'/63, l='MpServer', x=-460.63, y=4.00, z=817.81], abm['Slime'/62, l='MpServer', x=-446.53, y=4.00, z=707.97], zs['item.item.egg'/60, l='MpServer', x=-476.78, y=4.00, z=817.25]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bwb.a(SourceFile:307)
at bjs.b(SourceFile:2127)
at bjs.f(SourceFile:811)
at net.minecraft.client.main.Main.main(SourceFile:121)
-- System Details --
Details:
Minecraft Version: 14w21a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_07, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 211689760 bytes (201 MB) / 599588864 bytes (571 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w21a
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 8.15.10.2653, Intel
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.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.
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)
Anisotropic Filtering: Off (1)
You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-1574619/68407662/
Comments

Relates to MC-54008/MC-154499