Game crash on /summon when using a numeric ID inside "TileID:"

When doing the command

/summon FallingSand ~ ~ ~ {Time:1,Motion:[0.0,1.0,0.0],TileID:63}

the game crashes and a sign is placed.

What I expected to happen was...:
Either an error to say this is not a block or a block to fly up into the air and fall down.

What actually happened was...:
The game crashes and a sign is spawned

Steps to Reproduce:
1. Go into the snapshot
2. On your world, do the following command: "/summon FallingSand ~ ~ ~ {Time:1,Motion:[0.0,1.0,0.0],TileID:63}"
3. Game crashes
4. Log back in
5. Sign is where the entity landed

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 1/24/14 7:54 PM
Description: Rendering entity in world

java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at bqe.a(SourceFile:108)
	at btg.a(SourceFile:63)
	at btg.a(SourceFile:20)
	at btd.a(SourceFile:210)
	at btd.a(SourceFile:193)
	at btd.a(SourceFile:170)
	at bpp.a(SourceFile:382)
	at bpi.a(SourceFile:1085)
	at bpi.b(SourceFile:871)
	at bby.aj(SourceFile:801)
	at bby.f(SourceFile:728)
	at net.minecraft.client.main.Main.main(SourceFile:154)


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

-- Head --
Stacktrace:
	at java.util.ArrayList.elementData(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at bqe.a(SourceFile:108)
	at btg.a(SourceFile:63)
	at btg.a(SourceFile:20)

-- Entity being rendered --
Details:
	Entity Type: FallingSand (xi)
	Entity ID: 4748922
	Entity Name: Falling Block
	Entity's Exact location: -87.50, 66.96, -17.50
	Entity's Block location: -88.00,66.00,-18.00 - World: (-88,66,-18), Chunk: (at 8,4,14 in -6,-2; contains blocks -96,0,-32 to -81,255,-17), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Entity's Momentum: 0.00, 0.94, 0.00
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
	Immitating block ID: 63
	Immitating block data: 0

-- Renderer details --
Details:
	Assigned renderer: btg@165922d
	Location: 0.30,-1.41,0.04 - World: (0,-2,0), Chunk: (at 0,-1,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Rotation: 0.0
	Delta: 0.2137258
Stacktrace:
	at btd.a(SourceFile:210)
	at btd.a(SourceFile:193)
	at btd.a(SourceFile:170)
	at bpp.a(SourceFile:382)
	at bpi.a(SourceFile:1085)

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [boy['JacksonML'/4603965, l='MpServer', x=-87.80, y=67.62, z=-17.54], boz['Weatherfreak1'/4595209, l='MpServer', x=-84.00, y=65.00, z=-9.16]]
	Chunk stats: MultiplayerChunkCache: 440, 440
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: -209.00,89.00,78.00 - World: (-209,89,78), Chunk: (at 15,5,14 in -14,4; contains blocks -224,0,64 to -209,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 495117 game time, 97133 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: 23 total; [boy['JacksonML'/4603965, l='MpServer', x=-87.80, y=67.62, z=-17.54], wd['Bat'/4691515, l='MpServer', x=-19.25, y=46.10, z=61.75], boz['Weatherfreak1'/4595209, l='MpServer', x=-84.00, y=65.00, z=-9.16], wd['Bat'/4717774, l='MpServer', x=-64.31, y=56.01, z=35.78], wd['Bat'/4717776, l='MpServer', x=-64.25, y=53.78, z=29.75], wr['Squid'/4603837, l='MpServer', x=-67.53, y=57.25, z=-25.53], wr['Squid'/4603836, l='MpServer', x=-65.53, y=56.94, z=-24.47], yw['Villager'/4595239, l='MpServer', x=-47.50, y=65.00, z=17.25], wr['Squid'/4603838, l='MpServer', x=-67.53, y=57.00, z=-25.50], sp['entity.ItemFrame.name'/4595233, l='MpServer', x=-61.94, y=67.50, z=14.50], wd['Bat'/4727780, l='MpServer', x=-65.41, y=54.45, z=37.03], wd['Bat'/4727781, l='MpServer', x=-61.25, y=55.92, z=37.00], wd['Bat'/4727778, l='MpServer', x=-86.41, y=43.45, z=24.00], wd['Bat'/4727779, l='MpServer', x=-70.41, y=54.61, z=33.69], wd['Bat'/4727775, l='MpServer', x=-107.47, y=23.89, z=53.84], wr['Squid'/4595230, l='MpServer', x=-68.42, y=57.41, z=-24.31], wd['Bat'/4595231, l='MpServer', x=-69.31, y=59.10, z=-24.53], wd['Bat'/4595228, l='MpServer', x=-69.88, y=59.10, z=-24.50], wr['Squid'/4595229, l='MpServer', x=-67.41, y=57.30, z=-22.25], wd['Bat'/4689037, l='MpServer', x=-81.07, y=26.78, z=-66.42], xi['Falling Block'/4748922, l='MpServer', x=-87.50, y=66.96, z=-17.50], wd['Bat'/4727377, l='MpServer', x=-37.94, y=43.85, z=-84.81], boz['Weatherfreak1'/4595209, l='MpServer', x=-84.00, y=65.00, z=-9.16]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bmw.a(SourceFile:298)
	at bby.b(SourceFile:2029)
	at bby.f(SourceFile:737)
	at net.minecraft.client.main.Main.main(SourceFile:154)

-- System Details --
Details:
	Minecraft Version: 14w04b
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 68124128 bytes (64 MB) / 155029504 bytes (147 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: 0, tallocated: 0
	Launched Version: 14w04b
	LWJGL: 2.9.1
	OpenGL: GeForce GT 610/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
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)
	Anisotropic Filtering: Off (1)