Arrow in block moved by piston causes a game crash.

How to reproduce:

• Put a fencegate, anvil, ... down.

• Face a sticky piston towards it.

• Shoot an arrow in the block (not the piston)

• Power the piston

This will put the world out of commission.

[media]

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-2534598/

Crash:

java.lang.IllegalArgumentException: Cannot get property apb{name=facing, clazz=class cq, values=[north, south, west, east]} as it does not exist in aoq{block=minecraft:piston_extension, properties=[facing, type]}
	at aoq$a.b(SourceFile:132)
	at aje.a(SourceFile:88)
	at aol.a(SourceFile:162)
	at yg.t_(SourceFile:168)
	at afr.a(SourceFile:1407)
	at lg.a(SourceFile:600)
	at afr.g(SourceFile:1385)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 8/6/15 10:39 AM
Description: Ticking entity

java.lang.IllegalArgumentException: Cannot get property apb{name=facing, clazz=class cq, values=[north, south, west, east]} as it does not exist in aoq{block=minecraft:piston_extension, properties=[facing, type]}
	at aoq$a.b(SourceFile:132)
	at aje.a(SourceFile:88)
	at aol.a(SourceFile:162)
	at yg.t_(SourceFile:168)
	at afr.a(SourceFile:1407)
	at lg.a(SourceFile:600)
	at afr.g(SourceFile:1385)
	at afr.j(SourceFile:1278)
	at lg.j(SourceFile:481)
	at net.minecraft.server.MinecraftServer.D(SourceFile:620)
	at net.minecraft.server.MinecraftServer.C(SourceFile:548)
	at btp.C(SourceFile:152)
	at net.minecraft.server.MinecraftServer.run(SourceFile:452)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Stacktrace:
	at aoq$a.b(SourceFile:132)
	at aje.a(SourceFile:88)
	at aol.a(SourceFile:162)
	at yg.t_(SourceFile:168)
	at afr.a(SourceFile:1407)
	at lg.a(SourceFile:600)
	at afr.g(SourceFile:1385)

-- Entity being ticked --
Details:
	Entity Type: Arrow (yg)
	Entity ID: 67
	Entity Name: Arrow
	Entity's Exact location: 216.71, 32.81, 176.99
	Entity's Block location: 216.00,32.00,176.00 - World: (216,32,176), Chunk: (at 8,2,0 in 13,11; contains blocks 208,0,176 to 223,255,191), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 2.31, -0.09, 0.24
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at afr.j(SourceFile:1278)
	at lg.j(SourceFile:481)

-- Affected level --
Details:
	Level name: Beautiful Cookies 2.0
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 625 Drop: 0
	Level seed: 5717967919303138141
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 3;3*minecraft:stone,52*minecraft:sandstone;2;
	Level spawn location: 118.00,60.00,100.00 - World: (118,60,100), Chunk: (at 6,3,4 in 7,6; contains blocks 112,0,96 to 127,255,111), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 6413295 game time, 85911 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 69346 (now: false), thunder time: 16174 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:620)
	at net.minecraft.server.MinecraftServer.C(SourceFile:548)
	at btp.C(SourceFile:152)
	at net.minecraft.server.MinecraftServer.run(SourceFile:452)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 15w32b
	Operating System: Windows 8.1 (amd64) version 6.3
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 100298536 bytes (95 MB) / 210345984 bytes (200 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-2534598/74770241/