When I place oak wood my game crashes.
Here's the crash report:

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 6/18/14 3:05 PM
Description: Unexpected error

java.lang.IllegalArgumentException: Cannot set property ayi

as it does not exist!
at axy.a(SourceFile:128)
at atx.a(SourceFile:35)
at afg.a(SourceFile:61)
at aht.a(SourceFile:113)
at bxx.a(SourceFile:318)
at blh.ar(SourceFile:1320)
at blh.q(SourceFile:1677)
at blh.ap(SourceFile:860)
at blh.a(SourceFile:303)
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 axy.a(SourceFile:128)
at atx.a(SourceFile:35)
at afg.a(SourceFile:61)
at aht.a(SourceFile:113)
at bxx.a(SourceFile:318)
at blh.ar(SourceFile:1320)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [cbw['sclayg'/320, l='MpServer', x=-251.04, y=63.00, z=287.67]]
Chunk stats: MultiplayerChunkCache: 495, 495
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: -265.00,64.00,302.00 - World: (-265,64,302), Chunk: (at 7,4,14 in -17,18; contains blocks -272,0,288 to -257,255,303), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 1914947 game time, 1962675 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: 139 total; [yn['Bat'/272, l='MpServer', x=-190.43, y=49.18, z=366.82], aan['Creeper'/279, l='MpServer', x=-189.50, y=64.00, z=290.50], aan['Creeper'/277, l='MpServer', x=-183.06, y=43.00, z=213.31], aan['Creeper'/276, l='MpServer', x=-178.94, y=43.00, z=215.34], yn['Bat'/280, l='MpServer', x=-180.42, y=26.12, z=320.77], aca['Spider'/286, l='MpServer', x=-178.97, y=65.00, z=288.95], acf['Zombie'/284, l='MpServer', x=-173.16, y=67.00, z=267.66], abs['Skeleton'/259, l='MpServer', x=-199.84, y=44.00, z=271.31], abs['Skeleton'/262, l='MpServer', x=-188.34, y=64.00, z=289.30], abs['Skeleton'/263, l='MpServer', x=-198.13, y=65.00, z=300.91], aca['Spider'/260, l='MpServer', x=-201.31, y=45.50, z=265.69], aca['Spider'/261, l='MpServer', x=-190.72, y=64.00, z=271.94], acf['Zombie'/266, l='MpServer', x=-198.12, y=65.00, z=300.10], aan['Creeper'/267, l='MpServer', x=-193.50, y=63.00, z=318.50], abs['Skeleton'/264, l='MpServer', x=-196.50, y=65.00, z=300.50], acf['Zombie'/265, l='MpServer', x=-198.88, y=65.00, z=295.83], yn['Bat'/270, l='MpServer', x=-206.78, y=26.50, z=326.51], aan['Creeper'/271, l='MpServer', x=-195.50, y=26.00, z=363.50], yn['Bat'/268, l='MpServer', x=-205.53, y=11.09, z=332.65], yn['Bat'/269, l='MpServer', x=-202.53, y=27.10, z=332.75], abs['Skeleton'/85, l='MpServer', x=-327.25, y=29.00, z=287.47], aap['Enderman'/84, l='MpServer', x=-323.50, y=77.00, z=212.50], abs['Skeleton'/86, l='MpServer', x=-329.30, y=63.48, z=277.34], aan['Creeper'/83, l='MpServer', x=-321.44, y=75.00, z=216.94], abs['Skeleton'/93, l='MpServer', x=-320.50, y=63.00, z=342.50], cbw['sclayg'/320, l='MpServer', x=-251.04, y=63.00, z=287.67], acf['Zombie'/92, l='MpServer', x=-327.11, y=68.00, z=324.50], aan['Creeper'/94, l='MpServer', x=-328.62, y=39.00, z=363.46], yp['Chicken'/88, l='MpServer', x=-326.03, y=62.53, z=299.19], yp['Chicken'/91, l='MpServer', x=-326.34, y=67.00, z=326.44], aan['Creeper'/102, l='MpServer', x=-315.97, y=32.00, z=288.47], zc['Squid'/103, l='MpServer', x=-307.87, y=62.44, z=301.89], yp['Chicken'/100, l='MpServer', x=-316.29, y=64.00, z=259.41], yp['Chicken'/101, l='MpServer', x=-308.50, y=67.00, z=279.50], yp['Chicken'/98, l='MpServer', x=-315.25, y=64.00, z=259.41], zv['item.item.egg'/99, l='MpServer', x=-312.34, y=64.00, z=258.88], aca['Spider'/97, l='MpServer', x=-303.91, y=71.00, z=219.09], aca['Spider'/108, l='MpServer', x=-312.80, y=64.00, z=329.52], yp['Chicken'/106, l='MpServer', x=-309.34, y=62.50, z=305.19], zc['Squid'/107, l='MpServer', x=-307.25, y=61.29, z=308.92], aap['Enderman'/104, l='MpServer', x=-309.50, y=22.00, z=308.50], yp['Chicken'/105, l='MpServer', x=-308.81, y=62.56, z=305.81], yp['Chicken'/119, l='MpServer', x=-290.53, y=66.00, z=286.44], yp['Chicken'/118, l='MpServer', x=-289.13, y=66.00, z=286.09], yp['Chicken'/117, l='MpServer', x=-290.94, y=66.00, z=286.09], acf['Zombie'/116, l='MpServer', x=-288.38, y=23.00, z=208.03], yp['Chicken'/127, l='MpServer', x=-292.91, y=66.00, z=286.09], yp['Chicken'/126, l='MpServer', x=-289.13, y=66.00, z=286.57], yp['Chicken'/125, l='MpServer', x=-291.25, y=66.00, z=286.53], yp['Chicken'/124, l='MpServer', x=-292.91, y=66.00, z=287.09], yp['Chicken'/123, l='MpServer', x=-292.91, y=66.00, z=287.47], yp['Chicken'/122, l='MpServer', x=-291.16, y=66.00, z=286.94], yp['Chicken'/121, l='MpServer', x=-291.36, y=66.00, z=287.84], yp['Chicken'/120, l='MpServer', x=-289.56, y=66.00, z=286.09], yp['Chicken'/137, l='MpServer', x=-290.75, y=66.00, z=287.44], yp['Chicken'/136, l='MpServer', x=-290.82, y=66.00, z=288.08], yp['Chicken'/139, l='MpServer', x=-288.81, y=61.00, z=291.19], yp['Chicken'/138, l='MpServer', x=-288.81, y=61.00, z=292.78], yp['Chicken'/141, l='MpServer', x=-288.81, y=61.00, z=291.72], yp['Chicken'/140, l='MpServer', x=-288.81, y=61.00, z=292.28], yp['Chicken'/143, l='MpServer', x=-288.13, y=61.00, z=291.88], yp['Chicken'/142, l='MpServer', x=-288.10, y=61.00, z=292.78], yp['Chicken'/129, l='MpServer', x=-289.53, y=66.00, z=287.09], yp['Chicken'/128, l='MpServer', x=-292.03, y=66.00, z=287.43], yp['Chicken'/131, l='MpServer', x=-290.09, y=66.00, z=287.56], yp['Chicken'/130, l='MpServer', x=-292.47, y=66.00, z=286.09], yp['Chicken'/133, l='MpServer', x=-292.91, y=66.00, z=286.50], yp['Chicken'/132, l='MpServer', x=-291.81, y=66.00, z=286.19], yp['Chicken'/135, l='MpServer', x=-291.78, y=66.00, z=287.00], yp['Chicken'/134, l='MpServer', x=-292.16, y=66.00, z=286.53], yp['Chicken'/152, l='MpServer', x=-290.16, y=66.00, z=288.84], yp['Chicken'/153, l='MpServer', x=-289.41, y=66.00, z=288.53], yp['Chicken'/154, l='MpServer', x=-289.13, y=66.00, z=288.09], yp['Chicken'/155, l='MpServer', x=-291.85, y=66.00, z=288.94], yp['Chicken'/156, l='MpServer', x=-290.56, y=66.00, z=288.66], yp['Chicken'/157, l='MpServer', x=-291.25, y=66.00, z=288.53], yp['Chicken'/158, l='MpServer', x=-291.63, y=66.00, z=288.19], yp['Chicken'/159, l='MpServer', x=-289.31, y=66.00, z=286.53], yp['Chicken'/144, l='MpServer', x=-288.16, y=61.00, z=291.19], yp['Chicken'/145, l='MpServer', x=-288.11, y=61.00, z=291.19], yp['Chicken'/146, l='MpServer', x=-292.91, y=66.00, z=288.88], yp['Chicken'/147, l='MpServer', x=-289.97, y=66.00, z=286.61], yp['Chicken'/148, l='MpServer', x=-292.78, y=66.00, z=288.38], yp['Chicken'/149, l='MpServer', x=-292.28, y=66.00, z=288.88], yp['Chicken'/150, l='MpServer', x=-291.42, y=66.00, z=288.88], yp['Chicken'/151, l='MpServer', x=-292.50, y=66.00, z=286.66], zv['item.item.egg'/162, l='MpServer', x=-296.81, y=60.00, z=323.78], yp['Chicken'/161, l='MpServer', x=-288.09, y=62.52, z=323.34], yp['Chicken'/160, l='MpServer', x=-295.81, y=62.36, z=324.34], yp['Chicken'/186, l='MpServer', x=-287.22, y=61.00, z=292.56], yp['Chicken'/187, l='MpServer', x=-288.09, y=61.00, z=292.20], yp['Chicken'/184, l='MpServer', x=-287.22, y=61.00, z=292.78], yp['Chicken'/185, l='MpServer', x=-287.22, y=61.00, z=291.81], yp['Chicken'/190, l='MpServer', x=-287.41, y=62.48, z=323.31], ace['Witch'/191, l='MpServer', x=-282.09, y=64.00, z=336.41], yp['Chicken'/188, l='MpServer', x=-287.55, y=61.00, z=291.88], yp['Chicken'/189, l='MpServer', x=-287.34, y=62.61, z=323.97], yp['Chicken'/182, l='MpServer', x=-287.43, y=61.00, z=291.19], yp['Chicken'/183, l='MpServer', x=-287.52, y=61.00, z=291.19], yp['Chicken'/180, l='MpServer', x=-274.22, y=62.32, z=270.81], zv['item.item.egg'/181, l='MpServer', x=-274.88, y=62.00, z=271.28], yp['Chicken'/205, l='MpServer', x=-269.80, y=62.51, z=274.02], zv['item.item.egg'/204, l='MpServer', x=-270.53, y=60.00, z=271.44], zv['item.item.rottenFlesh'/207, l='MpServer', x=-263.78, y=66.00, z=284.19], zv['item.item.egg'/206, l='MpServer', x=-268.22, y=61.00, z=273.78], yp['Chicken'/203, l='MpServer', x=-271.13, y=62.53, z=271.13], zv['item.item.egg'/193, l='MpServer', x=-279.41, y=72.00, z=344.50], yp['Chicken'/192, l='MpServer', x=-279.56, y=72.00, z=343.63], acf['Zombie'/221, l='MpServer', x=-240.75, y=36.00, z=244.13], yr['Horse'/222, l='MpServer', x=-250.72, y=61.00, z=294.28], zv['item.item.egg'/223, l='MpServer', x=-245.75, y=62.00, z=303.50], yn['Bat'/212, l='MpServer', x=-265.83, y=25.14, z=329.40], acf['Zombie'/213, l='MpServer', x=-271.03, y=14.00, z=340.56], acf['Zombie'/214, l='MpServer', x=-267.81, y=66.00, z=353.50], adb['arrow'/208, l='MpServer', x=-259.66, y=64.03, z=285.22], uq['Experience Orb'/209, l='MpServer', x=-263.97, y=66.00, z=283.59], uq['Experience Orb'/210, l='MpServer', x=-264.75, y=66.00, z=284.75], uq['Experience Orb'/211, l='MpServer', x=-264.75, y=66.00, z=283.53], acf['Zombie'/239, l='MpServer', x=-229.16, y=61.66, z=295.47], aan['Creeper'/238, l='MpServer', x=-226.66, y=27.00, z=291.50], yn['Bat'/237, l='MpServer', x=-224.69, y=28.10, z=290.59], yn['Bat'/236, l='MpServer', x=-225.88, y=28.10, z=292.75], aan['Creeper'/235, l='MpServer', x=-235.97, y=35.00, z=251.31], yp['Chicken'/224, l='MpServer', x=-245.13, y=62.63, z=304.25], aan['Creeper'/254, l='MpServer', x=-223.50, y=32.00, z=342.50], acf['Zombie'/255, l='MpServer', x=-216.50, y=63.00, z=338.50], aan['Creeper'/252, l='MpServer', x=-211.50, y=63.00, z=325.50], aan['Creeper'/253, l='MpServer', x=-220.50, y=32.00, z=342.50], zz['container.minecart'/250, l='MpServer', x=-219.50, y=27.06, z=292.50], aan['Creeper'/251, l='MpServer', x=-223.63, y=27.00, z=291.50], aan['Creeper'/248, l='MpServer', x=-217.00, y=34.00, z=279.59], yn['Bat'/249, l='MpServer', x=-225.27, y=31.13, z=287.62], abs['Skeleton'/246, l='MpServer', x=-223.88, y=25.00, z=265.47], aca['Spider'/247, l='MpServer', x=-217.31, y=38.00, z=273.91], yn['Bat'/244, l='MpServer', x=-233.75, y=16.10, z=366.50], aan['Creeper'/242, l='MpServer', x=-238.38, y=22.00, z=324.91], yn['Bat'/243, l='MpServer', x=-238.11, y=14.21, z=365.51], aan['Creeper'/240, l='MpServer', x=-239.26, y=27.00, z=317.77], abs['Skeleton'/241, l='MpServer', x=-237.63, y=28.00, z=317.28]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bxy.a(SourceFile:310)
at blh.b(SourceFile:2133)
at blh.a(SourceFile:317)
at net.minecraft.client.main.Main.main(SourceFile:121)

– System Details –
Details:
Minecraft Version: 14w25a
Operating System: Mac OS X (x86_64) version 10.8.5
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 149166448 bytes (142 MB) / 368603136 bytes (351 MB) up to 3212509184 bytes (3063 MB)
JVM Flags: 1 total; -Xmx3G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 14w25a
LWJGL: 2.9.1
OpenGL: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-8.16.77, Intel Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object 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: [Monkeyfarms Custom John Smith RESOURCE PACK 1]
Current Language: English (US)
Profiler Position: N/A (disabled)