ViaVersion crash report /summon ItemFrame

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 2/29/16 11:29 PM
Description: Rendering entity in world

java.lang.ClassCastException: java.lang.Integer cannot be cast to com.google.common.base.Optional
	at xs.r(SourceFile:139)
	at bry.a(SourceFile:50)
	at bry.a(SourceFile:23)
	at brm.a(SourceFile:338)
	at brm.a(SourceFile:325)
	at bno.a(SourceFile:601)
	at bng.a(SourceFile:1260)
	at bng.b(SourceFile:1165)
	at bng.a(SourceFile:1012)
	at bcf.av(SourceFile:985)
	at bcf.a(SourceFile:392)
	at net.minecraft.client.main.Main.main(SourceFile:124)


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

-- Head --
Stacktrace:
	at xs.r(SourceFile:139)
	at bry.a(SourceFile:50)
	at bry.a(SourceFile:23)

-- Entity being rendered --
Details:
	Entity Type: ItemFrame (xs)
	Entity ID: 142
	Entity Name: entity.ItemFrame.name
	Entity's Exact location: 150.50, 63.50, 225.03
	Entity's Block location: World: (150,63,225), Chunk: (at 6,3,1 in 9,14; contains blocks 144,0,224 to 159,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0.00, 0.00, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null

-- Renderer details --
Details:
	Assigned renderer: bry@5ac3cc2d
	Location: -0.29,0.50,-0.80 - World: (-1,0,-1), Chunk: (at 15,0,15 in -1,-1; contains blocks -16,0,-16 to -1,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Rotation: 0.0
	Delta: 0.015905142
Stacktrace:
	at brm.a(SourceFile:338)
	at brm.a(SourceFile:325)
	at bno.a(SourceFile:601)
	at bng.a(SourceFile:1260)
	at bng.b(SourceFile:1165)

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bmt['PabloDons'/70, l='MpServer', x=150.79, y=63.00, z=225.83], bmu['Leandee123ice'/135, l='MpServer', x=158.69, y=63.00, z=226.69]]
	Chunk stats: MultiplayerChunkCache: 441, 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: World: (180,64,252), Chunk: (at 4,4,12 in 11,15; contains blocks 176,0,240 to 191,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 253806 game time, 6000 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 8 total; [bmt['PabloDons'/70, l='MpServer', x=150.79, y=63.00, z=225.83], bmu['Leandee123ice'/119, l='MpServer', x=155.75, y=63.00, z=226.78], aan['entity.MinecartRideable.name'/139, l='MpServer', x=151.88, y=63.00, z=225.00], yh['Cave Spider'/138, l='MpServer', x=164.13, y=65.91, z=211.09], aai['container.minecart'/140, l='MpServer', x=153.13, y=63.00, z=224.28], xs['entity.ItemFrame.name'/142, l='MpServer', x=150.50, y=63.50, z=225.03], bmu['Leandee123ice'/135, l='MpServer', x=158.69, y=63.00, z=226.69], bmu['Leandee123ice'/135, l='MpServer', x=158.69, y=63.00, z=226.69]]
	Retry entities: 0 total; []
	Server brand: Spigot
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bku.a(SourceFile:365)
	at bcf.b(SourceFile:2515)
	at bcf.a(SourceFile:401)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.9
	Operating System: Linux (amd64) version 4.2.0-30-generic
	Java Version: 1.7.0_80, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 135509448 bytes (129 MB) / 385585152 bytes (367 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 1.9
	LWJGL: 2.9.4
	OpenGL: Mesa DRI Intel(R) Ivybridge Mobile  GL version 3.0 Mesa 11.0.2, Intel Open Source Technology Center
	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: Yes
	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 Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz