I am currently building a adventure map, and use MC-Edit on it a lot. Hereis how to reproduce the bug in steps:
1. Create MC world.
2. Place chest and Place items inside, pretty much just fill it.
3. Close world and open MC-Edit after installing the createShops filter from http://sethbling.com/downloads/mcedit-filters/?p=1 .
4. Open world just created and select that chest made.
5. Filter it with the createShops filter, and check all checkboxes in the filter options. Press apply and save by pressing ctrl-S.
6. Open world again and initiate trade with villager. Scroll all the way to the last trade.

I have a theory that it is the item mincraft:pistonhead or ID #36. Of course these are not attainable normally, but it seems that this item crashes the game hard. I read the error report and it says that most likely it is a rendering error. In a matter of fact, here is the error report right here.

[08:16:25 INFO]: Client> s: Rendering screen
[08:16:25 INFO]: Client> at bmm.b(SourceFile:878) ~[1.7.4.jar:?]
[08:16:25 INFO]: Client> at azi.ah(SourceFile:787) ~[1.7.4.jar:?]
[08:16:25 INFO]: Client> at azi.f(SourceFile:711) [1.7.4.jar:?]
[08:16:25 INFO]: Client> at net.minecraft.client.main.Main.main(SourceFile:152) [1.7.4.jar:?]
[08:16:25 INFO]: Client> Caused by: java.lang.NullPointerException
[08:16:25 INFO]: Client> at bcl.a(SourceFile:76) ~[1.7.4.jar:?]
[08:16:25 INFO]: Client> at bel.a(SourceFile:165) ~[1.7.4.jar:?]
[08:16:25 INFO]: Client> at bmm.b(SourceFile:852) ~[1.7.4.jar:?]
[08:16:25 INFO]: Client> ... 3 more
[08:16:25 INFO]: Client> ---- Minecraft Crash Report ----
[08:16:25 INFO]: Client> // I just don't know what went wrong
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> Time: 12/22/13 8:16 AM
[08:16:25 INFO]: Client> Description: Rendering screen
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> java.lang.NullPointerException: Rendering screen
[08:16:25 INFO]: Client> at bcl.a(SourceFile:76)
[08:16:25 INFO]: Client> at bel.a(SourceFile:165)
[08:16:25 INFO]: Client> at bmm.b(SourceFile:852)
[08:16:25 INFO]: Client> at azi.ah(SourceFile:787)
[08:16:25 INFO]: Client> at azi.f(SourceFile:711)
[08:16:25 INFO]: Client> at net.minecraft.client.main.Main.main(SourceFile:152)
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> A detailed walkthrough of the error, its code path and all known details is as follows:
[08:16:25 INFO]: Client> ---------------------------------------------------------------------------------------
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> – Head –
[08:16:25 INFO]: Client> Stacktrace:
[08:16:25 INFO]: Client> at bcl.a(SourceFile:76)
[08:16:25 INFO]: Client> at bel.a(SourceFile:165)
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> – Screen render details –
[08:16:25 INFO]: Client> Details:
[08:16:25 INFO]: Client> Screen name: bel
[08:16:25 INFO]: Client> Mouse location: Scaled: (246, 139). Absolute: (493, 471)
[08:16:25 INFO]: Client> Screen size: Scaled: (400, 375). Absolute: (800, 750). Scale factor of 2
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> – Affected level –
[08:16:25 INFO]: Client> Details:
[08:16:25 INFO]: Client> Level name: MpServer
[08:16:25 INFO]: Client> All players: 1 total; [bkf['jccreszMinecraft'/23, l='MpServer', x=184.43, y=63.62, z=176.87]]
[08:16:25 INFO]: Client> Chunk stats: MultiplayerChunkCache: 885, 885
[08:16:25 INFO]: Client> Level seed: 0
[08:16:25 INFO]: Client> Level generator: ID 00 - default, ver 1. Features enabled: false
[08:16:25 INFO]: Client> Level generator options:
[08:16:25 INFO]: Client> Level spawn location: World: (648,6,249), Chunk: (at 8,0,9 in 40,15; contains blocks 640,0,240 to 655,255,255), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
[08:16:25 INFO]: Client> Level time: 2798516 game time, 15500 day time
[08:16:25 INFO]: Client> Level dimension: 0
[08:16:25 INFO]: Client> Level storage version: 0x00000 - Unknown?
[08:16:25 INFO]: Client> Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
[08:16:25 INFO]: Client> Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
[08:16:25 INFO]: Client> Forced entities: 12 total; [vf['Pig'/254, l='MpServer', x=137.50, y=75.00, z=245.50], vf['Pig'/255, l='MpServer', x=137.50, y=75.00, z=245.50], ux['Chicken'/272, l='MpServer', x=140.47, y=65.00, z=95.59], vf['Pig'/253, l='MpServer', x=123.09, y=77.00, z=218.13], rk['entity.ItemFrame.name'/250, l='MpServer', x=134.50, y=72.50, z=68.06], ux['Chicken'/251, l='MpServer', x=138.56, y=65.00, z=139.56], wb['item.item.egg'/320, l='MpServer', x=192.19, y=66.13, z=210.72], bkf['jccreszMinecraft'/23, l='MpServer', x=184.43, y=63.62, z=176.87], xm['Villager'/24, l='MpServer', x=184.50, y=62.00, z=179.50], uy['Cow'/228, l='MpServer', x=116.47, y=68.00, z=145.69], rk['entity.ItemFrame.name'/227, l='MpServer', x=115.50, y=74.50, z=93.94], ux['Chicken'/302, l='MpServer', x=191.44, y=67.00, z=209.59]]
[08:16:25 INFO]: Client> Retry entities: 0 total; []
[08:16:25 INFO]: Client> Server brand: vanilla
[08:16:25 INFO]: Client> Server type: Integrated singleplayer server
[08:16:25 INFO]: Client> Stacktrace:
[08:16:25 INFO]: Client> at bka.a(SourceFile:289)
[08:16:25 INFO]: Client> at azi.b(SourceFile:1952)
[08:16:25 INFO]: Client> at azi.f(SourceFile:720)
[08:16:25 INFO]: Client> at net.minecraft.client.main.Main.main(SourceFile:152)
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> – System Details –
[08:16:25 INFO]: Client> Details:
[08:16:25 INFO]: Client> Minecraft Version: 1.7.4
[08:16:25 INFO]: Client> Operating System: Windows 7 (amd64) version 6.1
[08:16:25 INFO]: Client> Java Version: 1.7.0_21, Oracle Corporation
[08:16:25 INFO]: Client> Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
[08:16:25 INFO]: Client> Memory: 225888584 bytes (215 MB) / 480706560 bytes (458 MB) up to 6681067520 bytes (6371 MB)
[08:16:25 INFO]: Client> JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx7G
[08:16:25 INFO]: Client> AABB Pool Size: 30227 (1692712 bytes; 1 MB) allocated, 3 (168 bytes; 0 MB) used
[08:16:25 INFO]: Client> IntCache: cache: 11, tcache: 0, allocated: 13, tallocated: 95
[08:16:25 INFO]: Client> Launched Version: 1.7.4
[08:16:25 INFO]: Client> LWJGL: 2.9.1
[08:16:25 INFO]: Client> OpenGL: AMD Radeon HD 6450 GL version 4.2.11627 Compatibility Profile Context, ATI Technologies Inc.
[08:16:25 INFO]: Client> GL Caps: Using GL 1.3 multitexturing.
[08:16:25 INFO]: Client> Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
[08:16:25 INFO]: Client> Anisotropic filtering is supported and maximum anisotropy is 16.
[08:16:25 INFO]: Client> Shaders are available because OpenGL 2.1 is supported.
[08:16:25 INFO]: Client>
[08:16:25 INFO]: Client> Is Modded: Probably not. Jar signature remains and client brand is untouched.
[08:16:25 INFO]: Client> Type: Client (map_client.txt)
[08:16:25 INFO]: Client> Resource Packs: [HiDefMC.zip]
[08:16:25 INFO]: Client> Current Language: English (US)
[08:16:25 INFO]: Client> Profiler Position: N/A (disabled)
[08:16:25 INFO]: Client> Vec3 Pool Size: 1640 (91840 bytes; 0 MB) allocated, 143 (8008 bytes; 0 MB) used
[08:16:25 INFO]: Client> Anisotropic Filtering: Off (1)
[08:16:25 INFO]: Client> #@Unable to render embedded object: File (@# Game crashed) not found. Crash report saved to: #@!@# C:\Users\Guest\AppData\Roaming\.minecraft\crash-reports\crash-2013-12-22_08.16.25-client.txt
[08:16:25 INFO]: Client> s: Saving entity NBT
[08:16:25 INFO]: Client> at qr.e(SourceFile:1043)
[08:16:25 INFO]: Client> at qr.d(SourceFile:1010)
[08:16:25 INFO]: Client> at apb.a(SourceFile:209)
[08:16:25 INFO]: Client> at apb.a(SourceFile:96)
[08:16:25 INFO]: Client> at ml.b(SourceFile:146)
[08:16:25 INFO]: Client> at ml.a(SourceFile:175)
[08:16:25 INFO]: Client> at mm.a(SourceFile:604)
[08:16:25 INFO]: Client> at net.minecraft.server.MinecraftServer.a(SourceFile:276)
[08:16:25 INFO]: Client> at net.minecraft.server.MinecraftServer.n(SourceFile:296)
[08:16:25 INFO]: Client> at btk.n(SourceFile:230)
[08:16:25 INFO]: Client> at net.minecraft.server.MinecraftServer.run(SourceFile:389)
[08:16:25 INFO]: Client> at lb.run(SourceFile:616)
[08:16:25 INFO]: Client> Caused by: java.lang.NullPointerException
[08:16:25 INFO]: Client> at afe.i(SourceFile:106)
[08:16:25 INFO]: Client> at aff.a(SourceFile:123)
[08:16:25 INFO]: Client> at xm.b(SourceFile:166)
[08:16:25 INFO]: Client> at qr.e(SourceFile:1031)
[08:16:25 INFO]: Client> ... 11 more
[08:16:25 INFO]: Client> AL lib: (EE) alc_cleanup: 1 device not closed
[08:16:26 ERROR]: Game ended with bad state (exit code -1)
[08:16:26 INFO]: Deleting C:\Users\Guest\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4-natives-1698827614584
[08:16:26 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[08:16:26 WARN]: Couldn't delete C:\Users\Guest\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4-natives-1698827614584 - scheduling for deletion upon exit

Don't exactly know what ALL of it means, but I know enough that it's a rendering error.