I went to get some Dark Oak, and when i cut it down, it gave me a Missing textured block, labeled "Oak Wood" and when i placed it, it crashed my game. here's the Log:

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 6/18/14 11:25 AM
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['spaceboyjonah'/218, l='MpServer', x=316.42, y=63.00, z=142.51]]
Chunk stats: MultiplayerChunkCache: 130, 130
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 172.00,64.00,256.00 - World: (172,64,256), Chunk: (at 12,4,0 in 10,16; contains blocks 160,0,256 to 175,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 399671 game time, 34853 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: 65 total; [zc['Squid'/141, l='MpServer', x=264.28, y=58.32, z=87.92], yy['Pig'/143, l='MpServer', x=260.81, y=63.00, z=145.22], yp['Chicken'/142, l='MpServer', x=261.31, y=62.67, z=138.72], zc['Squid'/154, l='MpServer', x=280.40, y=61.94, z=92.50], zc['Squid'/155, l='MpServer', x=285.23, y=60.85, z=105.93], zc['Squid'/156, l='MpServer', x=285.00, y=62.17, z=101.80], zc['Squid'/157, l='MpServer', x=284.23, y=58.39, z=101.74], yy['Pig'/158, l='MpServer', x=277.03, y=62.53, z=125.75], zc['Squid'/159, l='MpServer', x=287.68, y=62.27, z=113.34], abs['Skeleton'/144, l='MpServer', x=264.50, y=53.00, z=151.50], yp['Chicken'/145, l='MpServer', x=260.34, y=65.00, z=161.38], yy['Pig'/146, l='MpServer', x=271.94, y=63.00, z=211.00], aap['Enderman'/10982, l='MpServer', x=380.50, y=50.00, z=173.50], acf['Zombie'/171, l='MpServer', x=299.06, y=47.00, z=73.63], zc['Squid'/175, l='MpServer', x=294.39, y=62.28, z=98.85], zc['Squid'/174, l='MpServer', x=289.52, y=62.49, z=96.87], zc['Squid'/173, l='MpServer', x=287.91, y=61.31, z=86.81], aan['Creeper'/172, l='MpServer', x=301.50, y=48.00, z=74.50], aan['Creeper'/163, l='MpServer', x=285.50, y=26.00, z=176.50], yp['Chicken'/162, l='MpServer', x=285.47, y=66.00, z=165.16], yp['Chicken'/161, l='MpServer', x=275.59, y=64.00, z=157.31], yn['Bat'/160, l='MpServer', x=289.93, y=40.16, z=145.11], acf['Zombie'/1743, l='MpServer', x=294.50, y=21.00, z=107.50], yn['Bat'/1121, l='MpServer', x=305.45, y=27.84, z=159.45], acf['Zombie'/1744, l='MpServer', x=293.21, y=21.00, z=108.76], acf['Zombie'/190, l='MpServer', x=315.50, y=17.00, z=131.50], acf['Zombie'/191, l='MpServer', x=307.50, y=33.00, z=142.50], acf['Zombie'/188, l='MpServer', x=316.34, y=23.00, z=125.34], abs['Skeleton'/189, l='MpServer', x=318.50, y=17.00, z=128.50], ace['Witch'/12740, l='MpServer', x=255.50, y=66.00, z=165.50], acf['Zombie'/178, l='MpServer', x=298.16, y=39.00, z=143.47], aca['Spider'/179, l='MpServer', x=301.03, y=36.00, z=135.44], zc['Squid'/176, l='MpServer', x=290.31, y=62.18, z=110.07], yn['Bat'/177, l='MpServer', x=299.25, y=40.10, z=139.75], acf['Zombie'/4486, l='MpServer', x=332.50, y=22.00, z=172.50], ace['Witch'/180, l='MpServer', x=289.50, y=38.00, z=155.50], yy['Pig'/181, l='MpServer', x=291.00, y=64.00, z=165.00], zc['Squid'/205, l='MpServer', x=327.27, y=59.39, z=203.44], aan['Creeper'/204, l='MpServer', x=328.94, y=40.00, z=184.38], zv['item.item.dyePowder.black'/201, l='MpServer', x=328.59, y=51.00, z=82.84], abs['Skeleton'/10501, l='MpServer', x=317.50, y=26.00, z=143.50], abs['Skeleton'/10502, l='MpServer', x=315.50, y=26.00, z=146.50], aan['Creeper'/203, l='MpServer', x=332.50, y=40.00, z=183.50], abs['Skeleton'/10503, l='MpServer', x=317.50, y=26.00, z=145.50], acf['Zombie'/202, l='MpServer', x=325.53, y=29.00, z=128.94], yn['Bat'/196, l='MpServer', x=315.80, y=33.32, z=148.41], aan['Creeper'/193, l='MpServer', x=313.50, y=32.00, z=153.50], yn['Bat'/192, l='MpServer', x=316.69, y=15.50, z=141.82], abs['Skeleton'/195, l='MpServer', x=309.91, y=34.00, z=152.50], aan['Creeper'/194, l='MpServer', x=315.50, y=32.00, z=154.50], acf['Zombie'/213, l='MpServer', x=359.03, y=41.00, z=65.44], aan['Creeper'/214, l='MpServer', x=367.56, y=14.00, z=132.28], acf['Zombie'/215, l='MpServer', x=360.91, y=13.00, z=133.38], aan['Creeper'/208, l='MpServer', x=351.50, y=24.00, z=186.50], aan['Creeper'/209, l='MpServer', x=336.50, y=22.00, z=182.50], yn['Bat'/3891, l='MpServer', x=299.02, y=36.93, z=133.53], aca['Spider'/210, l='MpServer', x=336.50, y=40.00, z=181.50], abs['Skeleton'/237, l='MpServer', x=384.50, y=35.00, z=82.50], aan['Creeper'/236, l='MpServer', x=392.50, y=19.00, z=90.50], abs['Skeleton'/235, l='MpServer', x=395.50, y=34.00, z=70.50], abs['Skeleton'/234, l='MpServer', x=395.50, y=34.00, z=71.50], cbw['spaceboyjonah'/218, l='MpServer', x=316.42, y=63.00, z=142.51], aan['Creeper'/230, l='MpServer', x=380.50, y=35.00, z=82.50], aan['Creeper'/229, l='MpServer', x=383.50, y=35.00, z=81.50], abs['Skeleton'/15968, l='MpServer', x=313.50, y=18.00, z=130.50]]
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: Windows 7 (x86) version 6.1
Java Version: 1.7.0_55, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 56514880 bytes (53 MB) / 245399552 bytes (234 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 14w25a
LWJGL: 2.9.1
OpenGL: GeForce GT 630/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
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: []
Current Language: English (US)
Profiler Position: N/A (disabled)

How to reproduce:
Go and cho some Dark Oak logs