What I expected to happen was...:
Donkey would be outfitted with a chest.
What actually happened was...:
Game crashed to desktop / launcher with bug report.
Steps to Reproduce:
1. Start creative world.
2. Use Horse spawn eggs to spawn a Donkey
3. Ride Donkey until tame.
4. Right click with Chest in hand.
Crash report attached.
Related issues
is duplicated by
Attachments
Comments


Note:
Description: Exception in world tick
java.lang.ArrayIndexOutOfBoundsException: 2
at mg.a(SourceFile:66)
at vj.c(SourceFile:77)
at ud.a(SourceFile:391)
at bbf.a(SourceFile:815)
at dl.a(SourceFile:45)
at cj.b(SourceFile:64)

I'm unable to reproduce this bug. I spawned a donkey, tamed it, then right clicked with chest in hand, and nothing happened at all. What I can't do is to check a chested horse inventory (obtained through 3rd party tools).

Wait is my commend above (the 3rd sentence) a bug?

just experienced this bug using Snapshot 13w21b.
Computer
MAC OS X 10.7
Java 6_45
The entire crash report from DevCon:
---- Minecraft Crash Report ----
// Ooh. Shiny.
Time: 5/27/13 3:43 PM
Description: Exception in world tick
java.lang.ArrayIndexOutOfBoundsException: 2
at mg.a(SourceFile:66)
at vj.c(SourceFile:77)
at ud.a(SourceFile:391)
at bbf.a(SourceFile:815)
at dl.a(SourceFile:45)
at cj.b(SourceFile:64)
at bbf.d(SourceFile:95)
at bbn.b(SourceFile:58)
at asx.k(SourceFile:1387)
at asx.R(SourceFile:651)
at asx.d(SourceFile:607)
at net.minecraft.client.main.Main.main(SourceFile:78)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at mg.a(SourceFile:66)
at vj.c(SourceFile:77)
at ud.a(SourceFile:391)
at bbf.a(SourceFile:815)
at dl.a(SourceFile:45)
at cj.b(SourceFile:64)
at bbf.d(SourceFile:95)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bbq['Kr1alpha'/127, l='MpServer', x=-180.40, y=65.62, z=1555.66]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-216,64,64), Chunk: (at 8,4,0 in -14,4; contains blocks -224,0,64 to -209,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 22993872 game time, 1712242 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: 83 total; [rg['Pig'/412480, l='MpServer', x=-102.06, y=74.00, z=1496.09], ra['Horse'/404961, l='MpServer', x=-158.28, y=64.00, z=1556.03], rg['Pig'/412481, l='MpServer', x=-102.53, y=74.00, z=1500.31], ra['Horse'/404960, l='MpServer', x=-183.72, y=64.00, z=1552.56], sa['item.item.dyePowder.black'/446109, l='MpServer', x=-236.47, y=56.13, z=1597.50], sa['item.item.dyePowder.black'/446107, l='MpServer', x=-233.94, y=62.13, z=1586.66], sc['entity.MinecartChest.name'/404967, l='MpServer', x=-135.50, y=27.50, z=1631.13], ra['Horse'/414044, l='MpServer', x=-227.25, y=63.00, z=1540.34], ra['Horse'/404969, l='MpServer', x=-122.88, y=64.00, z=1594.00], bbq['Kr1alpha'/127, l='MpServer', x=-180.40, y=65.62, z=1555.66], ra['Horse'/414045, l='MpServer', x=-228.13, y=63.00, z=1542.28], ra['Donkey'/404968, l='MpServer', x=-180.22, y=64.00, z=1552.98], ra['Horse'/414046, l='MpServer', x=-229.16, y=63.00, z=1533.34], ra['Horse'/414047, l='MpServer', x=-228.00, y=63.00, z=1538.28], ra['Donkey'/404970, l='MpServer', x=-185.63, y=64.00, z=1550.72], rl['Iron Golem'/404972, l='MpServer', x=-183.75, y=64.00, z=1617.66], ra['Horse'/414319, l='MpServer', x=-257.28, y=64.00, z=1498.06], ra['Horse'/414042, l='MpServer', x=-246.00, y=67.00, z=1493.97], ra['Horse'/404975, l='MpServer', x=-217.19, y=64.00, z=1541.03], ra['Horse'/414043, l='MpServer', x=-224.03, y=68.00, z=1508.34], ra['Horse'/404974, l='MpServer', x=-222.13, y=63.00, z=1542.66], no['entity.LeashKnot.name'/422715, l='MpServer', x=-181.50, y=64.50, z=1552.50], ra['Horse'/404976, l='MpServer', x=-219.38, y=64.00, z=1536.22], qy['Chicken'/414321, l='MpServer', x=-257.63, y=69.00, z=1521.44], ra['Horse'/404977, l='MpServer', x=-144.00, y=64.00, z=1618.28], ra['Horse'/404978, l='MpServer', x=-147.91, y=64.00, z=1619.63], sc['entity.MinecartChest.name'/404979, l='MpServer', x=-152.50, y=30.50, z=1619.50], rh['Sheep'/404980, l='MpServer', x=-130.53, y=64.00, z=1615.94], ra['Horse'/404981, l='MpServer', x=-146.13, y=64.00, z=1621.28], sa['item.item.egg'/443092, l='MpServer', x=-242.97, y=55.13, z=1609.63], rl['Iron Golem'/404982, l='MpServer', x=-195.72, y=64.00, z=1604.91], tg['Villager'/404983, l='MpServer', x=-160.47, y=70.00, z=1580.72], qw['Bat'/446359, l='MpServer', x=-168.72, y=13.51, z=1633.44], rl['Iron Golem'/404987, l='MpServer', x=-199.41, y=64.00, z=1604.84], ra['Horse'/404988, l='MpServer', x=-219.66, y=63.00, z=1593.81], ra['Horse'/404989, l='MpServer', x=-218.97, y=63.00, z=1591.13], qw['Bat'/445289, l='MpServer', x=-111.75, y=29.10, z=1517.13], qy['Chicken'/446002, l='MpServer', x=-132.44, y=64.00, z=1573.53], rk['Squid'/445466, l='MpServer', x=-243.97, y=58.31, z=1613.19], rk['Squid'/445469, l='MpServer', x=-229.63, y=59.06, z=1598.28], rk['Squid'/445468, l='MpServer', x=-235.50, y=60.97, z=1598.56], qy['Chicken'/414053, l='MpServer', x=-243.47, y=61.86, z=1608.59], qy['Chicken'/429044, l='MpServer', x=-133.63, y=64.00, z=1573.38], rg['Pig'/414052, l='MpServer', x=-227.88, y=63.00, z=1612.19], tg['Villager'/404950, l='MpServer', x=-170.88, y=72.00, z=1575.44], rk['Squid'/446120, l='MpServer', x=-243.88, y=57.34, z=1606.75], sc['entity.MinecartChest.name'/404951, l='MpServer', x=-153.50, y=28.50, z=1560.88], ra['Horse'/414049, l='MpServer', x=-230.28, y=63.00, z=1552.03], ra['Horse'/414048, l='MpServer', x=-230.63, y=63.00, z=1555.38], sc['entity.MinecartChest.name'/404949, l='MpServer', x=-169.50, y=29.34, z=1599.50], rk['Squid'/446117, l='MpServer', x=-235.09, y=57.84, z=1605.88], ra['Horse'/404955, l='MpServer', x=-174.32, y=66.50, z=1554.51], rk['Squid'/446119, l='MpServer', x=-241.97, y=56.00, z=1595.06], qy['Chicken'/404952, l='MpServer', x=-132.97, y=64.00, z=1573.22], rk['Squid'/446118, l='MpServer', x=-238.78, y=55.00, z=1598.50], sc['entity.MinecartChest.name'/404953, l='MpServer', x=-136.50, y=30.50, z=1589.50], sc['entity.MinecartChest.name'/404958, l='MpServer', x=-153.50, y=30.50, z=1587.13], tg['Villager'/404959, l='MpServer', x=-172.53, y=69.00, z=1591.28], ra['Horse'/404956, l='MpServer', x=-203.56, y=67.00, z=1529.19], ra['Horse'/404957, l='MpServer', x=-175.06, y=64.00, z=1556.78], qw['Bat'/446171, l='MpServer', x=-192.98, y=27.82, z=1504.48], ra['Horse'/404903, l='MpServer', x=-208.56, y=64.00, z=1508.16], ra['Horse'/438158, l='MpServer', x=-228.44, y=70.00, z=1487.56], ra['Horse'/438157, l='MpServer', x=-242.47, y=64.00, z=1487.19], no['entity.LeashKnot.name'/421522, l='MpServer', x=-181.50, y=64.50, z=1549.50], ra['Donkey'/405008, l='MpServer', x=-179.97, y=64.00, z=1551.28], sc['entity.MinecartChest.name'/405011, l='MpServer', x=-127.50, y=23.50, z=1544.50], qw['Bat'/444096, l='MpServer', x=-199.91, y=45.48, z=1633.04], sc['entity.MinecartChest.name'/414088, l='MpServer', x=-253.28, y=35.34, z=1563.84], rg['Pig'/405001, l='MpServer', x=-129.13, y=64.00, z=1614.59], ra['Horse'/405003, l='MpServer', x=-185.72, y=64.00, z=1553.22], sc['entity.MinecartChest.name'/404913, l='MpServer', x=-175.28, y=23.34, z=1509.88], no['entity.LeashKnot.name'/408978, l='MpServer', x=-187.50, y=64.50, z=1550.50], sc['entity.MinecartChest.name'/404914, l='MpServer', x=-167.50, y=28.50, z=1513.50], rg['Pig'/405006, l='MpServer', x=-130.16, y=64.00, z=1574.63], rk['Squid'/440788, l='MpServer', x=-233.78, y=61.31, z=1588.50], rg['Pig'/405007, l='MpServer', x=-126.81, y=64.00, z=1581.94], ra['Horse'/414085, l='MpServer', x=-237.03, y=71.00, z=1489.84], ra['Horse'/414086, l='MpServer', x=-246.19, y=71.00, z=1514.44], ra['Horse'/414087, l='MpServer', x=-259.25, y=67.00, z=1528.06], qw['Bat'/444813, l='MpServer', x=-197.02, y=16.80, z=1559.57], no['entity.LeashKnot.name'/420718, l='MpServer', x=-187.50, y=64.50, z=1552.50], sc['entity.MinecartChest.name'/412479, l='MpServer', x=-166.50, y=23.34, z=1496.09]]
Retry entities: 0 total; []
Stacktrace:
at bbn.a(SourceFile:282)
at asx.k(SourceFile:1394)
at asx.R(SourceFile:651)
at asx.d(SourceFile:607)
at net.minecraft.client.main.Main.main(SourceFile:78)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bbq['Kr1alpha'/127, l='MpServer', x=-180.40, y=65.62, z=1555.66]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-216,64,64), Chunk: (at 8,4,0 in -14,4; contains blocks -224,0,64 to -209,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 22993872 game time, 1712242 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: 83 total; [rg['Pig'/412480, l='MpServer', x=-102.06, y=74.00, z=1496.09], ra['Horse'/404961, l='MpServer', x=-158.28, y=64.00, z=1556.03], rg['Pig'/412481, l='MpServer', x=-102.53, y=74.00, z=1500.31], ra['Horse'/404960, l='MpServer', x=-183.72, y=64.00, z=1552.56], sa['item.item.dyePowder.black'/446109, l='MpServer', x=-236.47, y=56.13, z=1597.50], sa['item.item.dyePowder.black'/446107, l='MpServer', x=-233.94, y=62.13, z=1586.66], sc['entity.MinecartChest.name'/404967, l='MpServer', x=-135.50, y=27.50, z=1631.13], ra['Horse'/414044, l='MpServer', x=-227.25, y=63.00, z=1540.34], ra['Horse'/404969, l='MpServer', x=-122.88, y=64.00, z=1594.00], bbq['Kr1alpha'/127, l='MpServer', x=-180.40, y=65.62, z=1555.66], ra['Horse'/414045, l='MpServer', x=-228.13, y=63.00, z=1542.28], ra['Donkey'/404968, l='MpServer', x=-180.22, y=64.00, z=1552.98], ra['Horse'/414046, l='MpServer', x=-229.16, y=63.00, z=1533.34], ra['Horse'/414047, l='MpServer', x=-228.00, y=63.00, z=1538.28], ra['Donkey'/404970, l='MpServer', x=-185.63, y=64.00, z=1550.72], rl['Iron Golem'/404972, l='MpServer', x=-183.75, y=64.00, z=1617.66], ra['Horse'/414319, l='MpServer', x=-257.28, y=64.00, z=1498.06], ra['Horse'/414042, l='MpServer', x=-246.00, y=67.00, z=1493.97], ra['Horse'/404975, l='MpServer', x=-217.19, y=64.00, z=1541.03], ra['Horse'/414043, l='MpServer', x=-224.03, y=68.00, z=1508.34], ra['Horse'/404974, l='MpServer', x=-222.13, y=63.00, z=1542.66], no['entity.LeashKnot.name'/422715, l='MpServer', x=-181.50, y=64.50, z=1552.50], ra['Horse'/404976, l='MpServer', x=-219.38, y=64.00, z=1536.22], qy['Chicken'/414321, l='MpServer', x=-257.63, y=69.00, z=1521.44], ra['Horse'/404977, l='MpServer', x=-144.00, y=64.00, z=1618.28], ra['Horse'/404978, l='MpServer', x=-147.91, y=64.00, z=1619.63], sc['entity.MinecartChest.name'/404979, l='MpServer', x=-152.50, y=30.50, z=1619.50], rh['Sheep'/404980, l='MpServer', x=-130.53, y=64.00, z=1615.94], ra['Horse'/404981, l='MpServer', x=-146.13, y=64.00, z=1621.28], sa['item.item.egg'/443092, l='MpServer', x=-242.97, y=55.13, z=1609.63], rl['Iron Golem'/404982, l='MpServer', x=-195.72, y=64.00, z=1604.91], tg['Villager'/404983, l='MpServer', x=-160.47, y=70.00, z=1580.72], qw['Bat'/446359, l='MpServer', x=-168.72, y=13.51, z=1633.44], rl['Iron Golem'/404987, l='MpServer', x=-199.41, y=64.00, z=1604.84], ra['Horse'/404988, l='MpServer', x=-219.66, y=63.00, z=1593.81], ra['Horse'/404989, l='MpServer', x=-218.97, y=63.00, z=1591.13], qw['Bat'/445289, l='MpServer', x=-111.75, y=29.10, z=1517.13], qy['Chicken'/446002, l='MpServer', x=-132.44, y=64.00, z=1573.53], rk['Squid'/445466, l='MpServer', x=-243.97, y=58.31, z=1613.19], rk['Squid'/445469, l='MpServer', x=-229.63, y=59.06, z=1598.28], rk['Squid'/445468, l='MpServer', x=-235.50, y=60.97, z=1598.56], qy['Chicken'/414053, l='MpServer', x=-243.47, y=61.86, z=1608.59], qy['Chicken'/429044, l='MpServer', x=-133.63, y=64.00, z=1573.38], rg['Pig'/414052, l='MpServer', x=-227.88, y=63.00, z=1612.19], tg['Villager'/404950, l='MpServer', x=-170.88, y=72.00, z=1575.44], rk['Squid'/446120, l='MpServer', x=-243.88, y=57.34, z=1606.75], sc['entity.MinecartChest.name'/404951, l='MpServer', x=-153.50, y=28.50, z=1560.88], ra['Horse'/414049, l='MpServer', x=-230.28, y=63.00, z=1552.03], ra['Horse'/414048, l='MpServer', x=-230.63, y=63.00, z=1555.38], sc['entity.MinecartChest.name'/404949, l='MpServer', x=-169.50, y=29.34, z=1599.50], rk['Squid'/446117, l='MpServer', x=-235.09, y=57.84, z=1605.88], ra['Horse'/404955, l='MpServer', x=-174.32, y=66.50, z=1554.51], rk['Squid'/446119, l='MpServer', x=-241.97, y=56.00, z=1595.06], qy['Chicken'/404952, l='MpServer', x=-132.97, y=64.00, z=1573.22], rk['Squid'/446118, l='MpServer', x=-238.78, y=55.00, z=1598.50], sc['entity.MinecartChest.name'/404953, l='MpServer', x=-136.50, y=30.50, z=1589.50], sc['entity.MinecartChest.name'/404958, l='MpServer', x=-153.50, y=30.50, z=1587.13], tg['Villager'/404959, l='MpServer', x=-172.53, y=69.00, z=1591.28], ra['Horse'/404956, l='MpServer', x=-203.56, y=67.00, z=1529.19], ra['Horse'/404957, l='MpServer', x=-175.06, y=64.00, z=1556.78], qw['Bat'/446171, l='MpServer', x=-192.98, y=27.82, z=1504.48], ra['Horse'/404903, l='MpServer', x=-208.56, y=64.00, z=1508.16], ra['Horse'/438158, l='MpServer', x=-228.44, y=70.00, z=1487.56], ra['Horse'/438157, l='MpServer', x=-242.47, y=64.00, z=1487.19], no['entity.LeashKnot.name'/421522, l='MpServer', x=-181.50, y=64.50, z=1549.50], ra['Donkey'/405008, l='MpServer', x=-179.97, y=64.00, z=1551.28], sc['entity.MinecartChest.name'/405011, l='MpServer', x=-127.50, y=23.50, z=1544.50], qw['Bat'/444096, l='MpServer', x=-199.91, y=45.48, z=1633.04], sc['entity.MinecartChest.name'/414088, l='MpServer', x=-253.28, y=35.34, z=1563.84], rg['Pig'/405001, l='MpServer', x=-129.13, y=64.00, z=1614.59], ra['Horse'/405003, l='MpServer', x=-185.72, y=64.00, z=1553.22], sc['entity.MinecartChest.name'/404913, l='MpServer', x=-175.28, y=23.34, z=1509.88], no['entity.LeashKnot.name'/408978, l='MpServer', x=-187.50, y=64.50, z=1550.50], sc['entity.MinecartChest.name'/404914, l='MpServer', x=-167.50, y=28.50, z=1513.50], rg['Pig'/405006, l='MpServer', x=-130.16, y=64.00, z=1574.63], rk['Squid'/440788, l='MpServer', x=-233.78, y=61.31, z=1588.50], rg['Pig'/405007, l='MpServer', x=-126.81, y=64.00, z=1581.94], ra['Horse'/414085, l='MpServer', x=-237.03, y=71.00, z=1489.84], ra['Horse'/414086, l='MpServer', x=-246.19, y=71.00, z=1514.44], ra['Horse'/414087, l='MpServer', x=-259.25, y=67.00, z=1528.06], qw['Bat'/444813, l='MpServer', x=-197.02, y=16.80, z=1559.57], no['entity.LeashKnot.name'/420718, l='MpServer', x=-187.50, y=64.50, z=1552.50], sc['entity.MinecartChest.name'/412479, l='MpServer', x=-166.50, y=23.34, z=1496.09]]
Retry entities: 0 total; []
-- System Details --
Details:
Minecraft Version: 13w21b
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.6.0_45, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 173442232 bytes (165 MB) / 334110720 bytes (318 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 1109 (62104 bytes; 0 MB) allocated, 1069 (59864 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 71
LWJGL: 2.9.0
OpenGL: AMD Radeon HD 6750M OpenGL Engine GL version 2.1 ATI-7.32.12, ATI Technologies Inc.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1564 (87584 bytes; 0 MB) allocated, 637 (35672 bytes; 0 MB) used