When placing a Dispenser (Anywhere) the game crashes. Here's the Log:

---- Minecraft Crash Report ----
// But it works on my machine.

Time: 12/2/15 5:16 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at rx.a_(SourceFile:409)
at zo.a(SourceFile:1818)
at rx.a(SourceFile:1198)
at bbz.au(SourceFile:1435)
at bbz.ax(SourceFile:1934)
at bbz.aw(SourceFile:1752)
at bbz.s(SourceFile:1596)
at bbz.as(SourceFile:942)
at bbz.a(SourceFile:386)
at net.minecraft.client.main.Main.main(SourceFile:122)

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

– Head –
Stacktrace:
at rx.a_(SourceFile:409)
at zo.a(SourceFile:1818)
at rx.a(SourceFile:1198)
at bbz.au(SourceFile:1435)
at bbz.ax(SourceFile:1934)
at bbz.aw(SourceFile:1752)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bmg['SpaceboyjonahSRG'/528, l='MpServer', x=-352.97, y=52.00, z=302.15]]
Chunk stats: MultiplayerChunkCache: 81, 81
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-244,64,256), Chunk: (at 12,4,0 in -16,16; contains blocks -256,0,256 to -241,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 3139553 game time, 56665 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: 103 total; [xn['entity.ItemFrame.name'/256, l='MpServer', x=-360.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/257, l='MpServer', x=-361.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/258, l='MpServer', x=-362.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/259, l='MpServer', x=-362.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/260, l='MpServer', x=-363.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/261, l='MpServer', x=-364.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/262, l='MpServer', x=-364.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/263, l='MpServer', x=-365.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/264, l='MpServer', x=-366.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/265, l='MpServer', x=-366.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/266, l='MpServer', x=-367.50, y=52.50, z=308.97], bmg['SpaceboyjonahSRG'/528, l='MpServer', x=-352.97, y=52.00, z=302.15], xn['entity.ItemFrame.name'/287, l='MpServer', x=-351.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/288, l='MpServer', x=-350.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/289, l='MpServer', x=-350.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/290, l='MpServer', x=-348.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/291, l='MpServer', x=-349.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/292, l='MpServer', x=-348.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/293, l='MpServer', x=-343.03, y=51.50, z=297.50], xn['entity.ItemFrame.name'/294, l='MpServer', x=-343.03, y=51.50, z=299.50], xn['entity.ItemFrame.name'/295, l='MpServer', x=-345.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/296, l='MpServer', x=-340.97, y=56.50, z=301.50], xn['entity.ItemFrame.name'/297, l='MpServer', x=-340.97, y=56.50, z=302.50], xn['entity.ItemFrame.name'/298, l='MpServer', x=-340.97, y=56.50, z=303.50], xn['entity.ItemFrame.name'/299, l='MpServer', x=-348.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/300, l='MpServer', x=-349.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/301, l='MpServer', x=-348.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/302, l='MpServer', x=-350.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/303, l='MpServer', x=-350.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/304, l='MpServer', x=-351.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/305, l='MpServer', x=-343.03, y=51.50, z=307.50], xn['entity.ItemFrame.name'/306, l='MpServer', x=-343.03, y=51.50, z=305.50], xn['entity.ItemFrame.name'/307, l='MpServer', x=-345.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/317, l='MpServer', x=-320.50, y=53.50, z=342.97], xn['entity.ItemFrame.name'/318, l='MpServer', x=-322.97, y=53.50, z=342.50], xn['entity.ItemFrame.name'/334, l='MpServer', x=-316.03, y=53.50, z=338.50], xn['entity.ItemFrame.name'/335, l='MpServer', x=-316.03, y=53.50, z=341.50], xn['entity.ItemFrame.name'/336, l='MpServer', x=-317.50, y=53.50, z=342.97], yn['Creeper'/81, l='MpServer', x=-400.50, y=11.00, z=256.50], yn['Creeper'/86, l='MpServer', x=-400.50, y=25.00, z=284.50], zb['Skeleton'/87, l='MpServer', x=-400.16, y=18.00, z=282.44], yn['Creeper'/93, l='MpServer', x=-400.50, y=32.00, z=291.50], ru['Experience Orb'/117, l='MpServer', x=-397.13, y=71.00, z=255.81], zf['Zombie'/120, l='MpServer', x=-396.50, y=15.00, z=271.50], vq['Bat'/121, l='MpServer', x=-394.88, y=11.28, z=263.47], ru['Experience Orb'/122, l='MpServer', x=-398.50, y=71.00, z=256.19], zf['Zombie'/123, l='MpServer', x=-385.50, y=12.00, z=278.50], vq['Bat'/124, l='MpServer', x=-387.13, y=11.22, z=290.19], zf['Zombie'/125, l='MpServer', x=-399.50, y=25.00, z=284.50], zb['Skeleton'/126, l='MpServer', x=-394.50, y=18.00, z=283.50], yn['Creeper'/127, l='MpServer', x=-398.50, y=45.00, z=276.50], yn['Creeper'/128, l='MpServer', x=-399.50, y=32.00, z=291.50], xx['Boat'/129, l='MpServer', x=-385.31, y=62.50, z=307.69], zf['Zombie'/130, l='MpServer', x=-387.50, y=52.00, z=313.50], vq['Bat'/152, l='MpServer', x=-380.31, y=11.91, z=271.22], xl['Armor Stand'/153, l='MpServer', x=-371.50, y=77.00, z=280.50], xn['entity.ItemFrame.name'/154, l='MpServer', x=-369.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/155, l='MpServer', x=-368.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/156, l='MpServer', x=-368.50, y=53.50, z=296.03], xx['Boat'/157, l='MpServer', x=-383.50, y=62.72, z=308.88], xn['entity.ItemFrame.name'/158, l='MpServer', x=-368.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/159, l='MpServer', x=-369.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/160, l='MpServer', x=-368.50, y=53.50, z=308.97], vq['Bat'/161, l='MpServer', x=-382.59, y=51.67, z=316.90], xl['Armor Stand'/217, l='MpServer', x=-363.50, y=71.00, z=283.50], xn['entity.ItemFrame.name'/218, l='MpServer', x=-363.03, y=73.50, z=283.50], xn['entity.ItemFrame.name'/219, l='MpServer', x=-367.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/220, l='MpServer', x=-366.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/221, l='MpServer', x=-366.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/222, l='MpServer', x=-365.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/223, l='MpServer', x=-364.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/224, l='MpServer', x=-364.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/225, l='MpServer', x=-363.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/226, l='MpServer', x=-362.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/227, l='MpServer', x=-362.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/228, l='MpServer', x=-361.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/229, l='MpServer', x=-360.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/230, l='MpServer', x=-360.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/231, l='MpServer', x=-359.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/232, l='MpServer', x=-358.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/233, l='MpServer', x=-358.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/234, l='MpServer', x=-357.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/235, l='MpServer', x=-356.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/236, l='MpServer', x=-356.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/237, l='MpServer', x=-355.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/238, l='MpServer', x=-354.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/239, l='MpServer', x=-353.50, y=52.50, z=296.03], xn['entity.ItemFrame.name'/240, l='MpServer', x=-354.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/241, l='MpServer', x=-352.50, y=53.50, z=296.03], xn['entity.ItemFrame.name'/242, l='MpServer', x=-352.50, y=51.50, z=297.03], xn['entity.ItemFrame.name'/243, l='MpServer', x=-352.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/244, l='MpServer', x=-352.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/245, l='MpServer', x=-353.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/246, l='MpServer', x=-354.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/247, l='MpServer', x=-354.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/248, l='MpServer', x=-356.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/249, l='MpServer', x=-355.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/250, l='MpServer', x=-356.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/251, l='MpServer', x=-357.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/252, l='MpServer', x=-358.50, y=51.50, z=307.97], xn['entity.ItemFrame.name'/253, l='MpServer', x=-358.50, y=53.50, z=308.97], xn['entity.ItemFrame.name'/254, l='MpServer', x=-359.50, y=52.50, z=308.97], xn['entity.ItemFrame.name'/255, l='MpServer', x=-360.50, y=53.50, z=308.97]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bkh.a(SourceFile:364)
at bbz.b(SourceFile:2496)
at bbz.a(SourceFile:400)
at net.minecraft.client.main.Main.main(SourceFile:122)

– System Details –
Details:
Minecraft Version: 15w49a
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.8.0_31, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 128350528 bytes (122 MB) / 295784448 bytes (282 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Launched Version: 15w49a
LWJGL: 2.9.4
OpenGL: GeForce GT 630/PCIe/SSE2 GL version 4.5.0 NVIDIA 355.98, 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.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
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)
CPU: 4x AMD FX(tm)-4300 Quad-Core Processor