16w32a - Crash when a zombie pigman hits you

I was testing MC-2432 and I spawned a bunch of zombie pigmen. I 1-hit KO'd one of them but the sword "swipe" attack meant that I hurt a few other pigmen without killing them. They got angry towards me, and they hit me and the game immediantely crashed.

This doesn't seem to happen with any other mob.

Crash report

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 10/08/16 10:35 AM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
	at zo.B(SourceFile:125)
	at aaa.B(SourceFile:263)
	at ug.a(SourceFile:121)
	at ug.e(SourceFile:113)
	at vh.e(SourceFile:28)
	at tz.a(SourceFile:129)
	at so.cr(SourceFile:642)
	at sn.n(SourceFile:1793)
	at so.n(SourceFile:495)
	at zo.n(SourceFile:41)
	at aaa.n(SourceFile:213)
	at sn.m(SourceFile:1655)
	at so.m(SourceFile:278)
	at zo.m(SourceFile:46)
	at zp.m(SourceFile:69)
	at aiu.a(SourceFile:1526)
	at lu.a(SourceFile:716)
	at aiu.g(SourceFile:1504)
	at aiu.k(SourceFile:1387)
	at lu.k(SourceFile:549)
	at net.minecraft.server.MinecraftServer.D(SourceFile:627)
	at net.minecraft.server.MinecraftServer.C(SourceFile:555)
	at caj.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:459)
	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 --
Thread: Server thread
Stacktrace:
	at zo.B(SourceFile:125)
	at aaa.B(SourceFile:263)
	at ug.a(SourceFile:121)
	at ug.e(SourceFile:113)
	at vh.e(SourceFile:28)
	at tz.a(SourceFile:129)
	at so.cr(SourceFile:642)
	at sn.n(SourceFile:1793)
	at so.n(SourceFile:495)
	at zo.n(SourceFile:41)
	at aaa.n(SourceFile:213)
	at sn.m(SourceFile:1655)
	at so.m(SourceFile:278)
	at zo.m(SourceFile:46)
	at zp.m(SourceFile:69)
	at aiu.a(SourceFile:1526)
	at lu.a(SourceFile:716)
	at aiu.g(SourceFile:1504)

-- Entity being ticked --
Details:
	Entity Type: minecraft:zombie_pigman (zp)
	Entity ID: 1
	Entity Name: Zombie Pigman
	Entity's Exact location: 24319.30, 64.00, 6.70
	Entity's Block location: World: (24319,64,6), Chunk: (at 15,4,6 in 1519,0; contains blocks 24304,0,0 to 24319,255,15), Region: (47,0; contains chunks 1504,0 to 1535,31, blocks 24064,0,0 to 24575,255,511)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aiu.k(SourceFile:1387)
	at lu.k(SourceFile:549)

-- Affected level --
Details:
	Level name: Bug Testing v2.0
	All players: 1 total; [lw['__null'/0, l='Bug Testing v2.0', x=24318.29, y=64.50, z=6.48]]
	Chunk stats: ServerChunkCache: 1714 Drop: 0
	Level seed: -4496926694366351498
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock,63*minecraft:quartz_block;2;
	Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 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)
	Level time: 173827 game time, 18000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:627)
	at net.minecraft.server.MinecraftServer.C(SourceFile:555)
	at caj.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:459)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 16w32a
	Operating System: Mac OS X (x86_64) version 10.11.6
	Java Version: 1.8.0_74, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1387600720 bytes (1323 MB) / 2058354688 bytes (1963 MB) up to 2058354688 bytes (1963 MB)
	JVM Flags: 2 total; -Xms2G -Xmx2G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [lw['__null'/0, l='Bug Testing v2.0', x=24318.29, y=64.50, z=6.48]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.