[MC-31567] Crash with stacked entities [?]

I created a weird stacked entity (command was something like

/summon MinecartRideable ~ ~ ~ {Riding:{id:Villager,Riding:{id:MinecartRideable}}}

, but it wasn't in the log...)

and then realized I did something wrong and tried to kill it. This happened:
(I cut out a large amount of duplicate text, however it looped for a while)

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 9/18/13 5:35 PM
Description: Ticking entity

java.lang.StackOverflowError
	at qq.a(SourceFile:67)
	at pd.bk(SourceFile:410)
	at pc.e(SourceFile:1311)
	at pd.e(SourceFile:292)
	at oh.e(SourceFile:93)
	at pc.h(SourceFile:1198)
	at pd.h(SourceFile:169)
	at ok.X(SourceFile:1166)
	at pc.X(SourceFile:1372)
	at adc.a(SourceFile:1370)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
            ......
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)


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

-- Head --
Stacktrace:
	at qq.a(SourceFile:67)
	at pd.bk(SourceFile:410)
	at pc.e(SourceFile:1311)
	at pd.e(SourceFile:292)
	at oh.e(SourceFile:93)
	at pc.h(SourceFile:1198)
	at pd.h(SourceFile:169)
	at ok.X(SourceFile:1166)
	at pc.X(SourceFile:1372)
	at adc.a(SourceFile:1370)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
     ..... (Why did it put this twice?)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)
	at adc.a(SourceFile:1409)
	at kl.a(SourceFile:479)
	at adc.g(SourceFile:1350)

-- Entity being ticked --
Details:
	Entity Type: Villager (va)
	Entity ID: 861164
	Entity Name: Villager
	Entity's Exact location: -549.36, 4044.60, 286.03
	Entity's Block location: World: (-550,4044,286), Chunk: (at 10,252,14 in -35,17; contains blocks -560,0,272 to -545,255,287), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at adc.h(SourceFile:1260)
	at kl.h(SourceFile:364)
	at net.minecraft.server.MinecraftServer.u(SourceFile:464)
	at net.minecraft.server.MinecraftServer.t(SourceFile:399)
	at bnw.t(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:333)
	at ja.run(SourceFile:576)

-- Affected level --
Details:
	Level name: Redstone stuff
	All players: 1 total; [ko['pokechu22'/110482, l='Redstone stuff', x=-550.23, y=56.00, z=286.94]]
	Chunk stats: ServerChunkCache: 515 Drop: 0
	Level seed: 6376171614271646811
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 2;7,3x1,52x24;2;
	Level spawn location: World: (-598,4,324), Chunk: (at 10,0,4 in -38,20; contains blocks -608,0,320 to -593,255,335), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
	Level time: 793500 game time, 13000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 41337 (now: false), thunder time: 25409 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true

-- System Details --
Details:
	Minecraft Version: 13w37a
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_13, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 169130000 bytes (161 MB) / 954466304 bytes (910 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 47952 (2685312 bytes; 2 MB) allocated, 47952 (2685312 bytes; 2 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 371 (20776 bytes; 0 MB) allocated, 371 (20776 bytes; 0 MB) used
	Player Count: 1 / 8; [ko['pokechu22'/110482, l='Redstone stuff', x=-550.23, y=56.00, z=286.94]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.