Minecraft Crashed with this error code when placing ladder:
---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 7/9/14 11:47 PM
Description: Unexpected error

java.lang.IllegalArgumentException: Cannot get property bck

{name=facing, clazz=class ei, values=[north, south, west, east]}

as it does not exist!
at bbw.b(SourceFile:91)
at avi.a(SourceFile:47)
at avi.a(SourceFile:35)
at apm.a(SourceFile:2320)
at ait.a(SourceFile:106)
at cdt.a(SourceFile:295)
at bqi.ar(SourceFile:1325)
at bqi.q(SourceFile:1682)
at bqi.ap(SourceFile:863)
at bqi.a(SourceFile:303)
at net.minecraft.client.main.Main.main(SourceFile:120)

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

– Head –
Stacktrace:
at bbw.b(SourceFile:91)
at avi.a(SourceFile:47)
at avi.a(SourceFile:35)
at apm.a(SourceFile:2320)
at ait.a(SourceFile:106)
at cdt.a(SourceFile:295)
at bqi.ar(SourceFile:1325)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [chv['2Sniperviper'/72, l='MpServer', x=-33.98, y=68.97, z=-4583.30]]
Chunk stats: MultiplayerChunkCache: 729, 729
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 4.00,64.00,100.00 - World: (4,64,100), Chunk: (at 4,4,4 in 0,6; contains blocks 0,0,96 to 15,255,111), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 5297894 game time, 5178 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: 89 total; [abe['Chicken'/272, l='MpServer', x=-42.63, y=70.00, z=-4508.59], abb['Bat'/279, l='MpServer', x=-44.59, y=48.03, z=-4642.28], abn['Pig'/278, l='MpServer', x=-43.91, y=69.00, z=-4657.09], acy['item.item.egg'/283, l='MpServer', x=-46.03, y=70.00, z=-4526.94], abe['Chicken'/282, l='MpServer', x=-50.41, y=71.00, z=-4518.66], abb['Bat'/281, l='MpServer', x=-45.72, y=45.03, z=-4528.63], abb['Bat'/280, l='MpServer', x=-43.63, y=48.38, z=-4643.81], xf['Painting'/334, l='MpServer', x=-1.03, y=71.00, z=-4591.50], xf['Painting'/336, l='MpServer', x=-8.97, y=88.50, z=-4584.00], abb['Bat'/266, l='MpServer', x=-60.81, y=41.81, z=-4527.34], xf['Painting'/333, l='MpServer', x=-8.97, y=71.00, z=-4583.50], abe['Chicken'/267, l='MpServer', x=-61.50, y=73.00, z=-4525.69], xf['Painting'/335, l='MpServer', x=-1.03, y=71.00, z=-4590.50], chv['2Sniperviper'/72, l='MpServer', x=-33.98, y=68.97, z=-4583.30], abb['Bat'/268, l='MpServer', x=-56.72, y=51.22, z=-4504.31], abf['Cow'/317, l='MpServer', x=-13.81, y=66.00, z=-4645.81], abf['Cow'/319, l='MpServer', x=-15.16, y=66.00, z=-4638.91], abf['Cow'/318, l='MpServer', x=-12.13, y=67.00, z=-4636.13], abn['Pig'/293, l='MpServer', x=-39.50, y=70.00, z=-4656.22], abb['Bat'/295, l='MpServer', x=-31.53, y=24.10, z=-4650.25], abf['Cow'/296, l='MpServer', x=-26.09, y=68.00, z=-4647.06], abn['Pig'/297, l='MpServer', x=-29.00, y=68.00, z=-4642.97], abf['Cow'/298, l='MpServer', x=-17.31, y=67.00, z=-4631.25], abb['Bat'/299, l='MpServer', x=-26.81, y=35.56, z=-4512.53], abn['Pig'/300, l='MpServer', x=-17.22, y=73.00, z=-4508.91], xf['Painting'/321, l='MpServer', x=-8.97, y=71.00, z=-4601.50], xf['Painting'/332, l='MpServer', x=-8.97, y=88.50, z=-4602.00], xf['Painting'/330, l='MpServer', x=-8.97, y=82.50, z=-4602.50], xf['Painting'/331, l='MpServer', x=-8.97, y=88.50, z=-4599.00], xf['Painting'/328, l='MpServer', x=-8.97, y=82.50, z=-4600.00], xf['Painting'/329, l='MpServer', x=-8.97, y=82.50, z=-4597.50], abf['Cow'/337, l='MpServer', x=-10.69, y=56.00, z=-4559.78], xf['Painting'/336, l='MpServer', x=-8.97, y=88.50, z=-4584.00], abf['Cow'/350, l='MpServer', x=2.44, y=69.44, z=-4512.38], xf['Painting'/326, l='MpServer', x=-8.97, y=75.50, z=-4593.00], abf['Cow'/349, l='MpServer', x=14.50, y=65.00, z=-4536.72], xf['Painting'/327, l='MpServer', x=-8.97, y=76.50, z=-4602.00], abf['Cow'/348, l='MpServer', x=12.28, y=25.00, z=-4553.75], xf['Painting'/324, l='MpServer', x=-1.03, y=71.00, z=-4594.50], abo['Rabbit'/347, l='MpServer', x=11.81, y=58.00, z=-4575.41], abf['Cow'/346, l='MpServer', x=12.88, y=64.00, z=-4644.03], xf['Painting'/325, l='MpServer', x=-5.97, y=70.50, z=-4593.00], abb['Bat'/345, l='MpServer', x=29.97, y=32.06, z=-4624.31], xf['Painting'/322, l='MpServer', x=-8.97, y=71.00, z=-4602.50], xf['Painting'/323, l='MpServer', x=-1.03, y=71.00, z=-4595.50], abf['Cow'/220, l='MpServer', x=-105.78, y=64.00, z=-4643.84], xf['Painting'/326, l='MpServer', x=-8.97, y=75.50, z=-4593.00], abe['Chicken'/221, l='MpServer', x=-108.44, y=63.00, z=-4630.41], xf['Painting'/327, l='MpServer', x=-8.97, y=76.50, z=-4602.00], abb['Bat'/222, l='MpServer', x=-98.72, y=54.03, z=-4588.31], xf['Painting'/324, l='MpServer', x=-1.03, y=71.00, z=-4594.50], abb['Bat'/223, l='MpServer', x=-94.66, y=54.91, z=-4593.75], xf['Painting'/325, l='MpServer', x=-5.97, y=70.50, z=-4593.00], xf['Painting'/322, l='MpServer', x=-8.97, y=71.00, z=-4602.50], xf['Painting'/323, l='MpServer', x=-1.03, y=71.00, z=-4595.50], abf['Cow'/320, l='MpServer', x=-14.31, y=67.00, z=-4634.47], xf['Painting'/321, l='MpServer', x=-8.97, y=71.00, z=-4601.50], xf['Painting'/334, l='MpServer', x=-1.03, y=71.00, z=-4591.50], xf['Painting'/335, l='MpServer', x=-1.03, y=71.00, z=-4590.50], xf['Painting'/332, l='MpServer', x=-8.97, y=88.50, z=-4602.00], xf['Painting'/333, l='MpServer', x=-8.97, y=71.00, z=-4583.50], abe['Chicken'/208, l='MpServer', x=-109.50, y=63.00, z=-4616.84], xf['Painting'/330, l='MpServer', x=-8.97, y=82.50, z=-4602.50], xf['Painting'/331, l='MpServer', x=-8.97, y=88.50, z=-4599.00], xf['Painting'/328, l='MpServer', x=-8.97, y=82.50, z=-4600.00], xf['Painting'/329, l='MpServer', x=-8.97, y=82.50, z=-4597.50], abe['Chicken'/238, l='MpServer', x=-100.38, y=70.00, z=-4522.34], abf['Cow'/237, l='MpServer', x=-91.75, y=70.00, z=-4533.47], abb['Bat'/236, l='MpServer', x=-93.53, y=18.72, z=-4564.25], abf['Cow'/235, l='MpServer', x=-94.38, y=78.00, z=-4586.63], abb['Bat'/234, l='MpServer', x=-96.00, y=54.02, z=-4588.84], wx['entity.LeashKnot.name'/853, l='MpServer', x=54.50, y=64.50, z=-4615.50], abb['Bat'/233, l='MpServer', x=-90.09, y=53.02, z=-4613.38], abf['Cow'/232, l='MpServer', x=-82.66, y=73.00, z=-4647.28], abb['Bat'/380, l='MpServer', x=39.44, y=19.25, z=-4527.31], abo['Rabbit'/379, l='MpServer', x=41.91, y=64.00, z=-4547.63], abe['Chicken'/250, l='MpServer', x=-78.59, y=70.00, z=-4533.38], acy['item.item.egg'/251, l='MpServer', x=-78.13, y=70.00, z=-4533.75], abf['Cow'/248, l='MpServer', x=-67.84, y=72.00, z=-4597.16], abz['Squid'/249, l='MpServer', x=-76.50, y=50.00, z=-4560.38], abn['Pig'/246, l='MpServer', x=-65.59, y=66.00, z=-4644.28], abo['Rabbit'/364, l='MpServer', x=23.88, y=63.00, z=-4633.78], abo['Rabbit'/365, l='MpServer', x=31.53, y=64.00, z=-4629.28], abn['Pig'/247, l='MpServer', x=-71.50, y=73.00, z=-4638.72], abn['Pig'/244, l='MpServer', x=-74.84, y=73.00, z=-4653.91], abf['Cow'/366, l='MpServer', x=29.97, y=64.00, z=-4535.13], abf['Cow'/245, l='MpServer', x=-70.25, y=71.00, z=-4643.38], adi['entity.MinecartRideable.name'/367, l='MpServer', x=26.50, y=44.19, z=-4515.88], abb['Bat'/363, l='MpServer', x=26.19, y=29.16, z=-4630.53]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at cdu.a(SourceFile:308)
at bqi.b(SourceFile:2139)
at bqi.a(SourceFile:317)
at net.minecraft.client.main.Main.main(SourceFile:120)

– System Details –
Details:
Minecraft Version: 14w28a
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_40, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 500932448 bytes (477 MB) / 1124073472 bytes (1072 MB) up to 5592580096 bytes (5333 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6000m
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Launched Version: 14w28a
LWJGL: 2.9.1
OpenGL: AMD Radeon HD 6410D GL version 4.3.12618 Compatibility Profile Context 13.251.0.0, ATI Technologies Inc.
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.

Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: [NOwSphax PureBDcraft 128x MC18.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)