Exception ticking world crash in worlds with double-slab blocks

Can confirm.

I duplicated this in a new test world where no blocks have been placed (tested with a Superflat world with Bedrock, Dirt, Dirt, Grass.)

java.lang.IllegalArgumentException: Cannot get property arh{name=half, clazz=class als$a, values=[top, bottom]} as it does not exist in aqv{block=minecraft:double_stone_slab, properties=[seamless, variant]}

Steps to reproduce:

1. Create a new world in Creative mode (I used Redstone Ready superflat)

2. Make a double slab

3. Place redstone dust on top

Fenhl's comment is more accurate, my re-test was on Superflat but it had generate structures enabled.

I got a bug similar to this in survival single player. The world crashed and the game doesn't seem to be able to detect the save anymore.

EDIT: IT seems to be that my level.dat and level.dat_old disappeared.

Can confirm, I don't think I even have double slabs, just single slabs. My save is detectable but after about a second it probably loads my single cobblestone slabs and quits.

EDIT: There are stone slabs on top of the village blacksmith's house. None double.

ANOTHER EDIT: The fake anvil outside the blacksmith.

Sorry about the text wall:

Time: 12/2/15 5:18 PM
Description: Exception ticking world

java.lang.IllegalArgumentException: Cannot get property arh{name=half, clazz=class als$a, values=[top, bottom]} as it does not exist in aqv{block=minecraft:double_stone_slab, properties=[seamless, variant]}
at aqv$a.c(SourceFile:165)
at als.k(SourceFile:50)
at aqv$a.q(SourceFile:388)
at ahu.a(SourceFile:203)
at ahu.a(SourceFile:132)
at lp.d(SourceFile:198)
at net.minecraft.server.MinecraftServer.D(SourceFile:617)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)
at bxz.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:457)
at java.lang.Thread.run(Unknown Source)

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

– Head –
Stacktrace:
at aqv$a.c(SourceFile:165)
at als.k(SourceFile:50)
at aqv$a.q(SourceFile:388)
at ahu.a(SourceFile:203)
at ahu.a(SourceFile:132)
at lp.d(SourceFile:198)

– Affected level –
Details:
Level name: Superflat
All players: 1 total; [lr['tootiseroll'/90, l='Superflat', x=-137.15, y=18.97, z=-117.59]]
Chunk stats: ServerChunkCache: 1089 Drop: 0
Level seed: -8966271473024021391
Level generator: ID 01 - flat, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (-139,4,-146), Chunk: (at 5,0,14 in -9,-10; contains blocks -144,0,-160 to -129,255,-145), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 444043 game time, 444043 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 155 (now: true), thunder time: 96962 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:617)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)
at bxz.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:457)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 15w49a
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: 109803264 bytes (104 MB) / 303112192 bytes (289 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: 1 / 8; [lr['tootiseroll'/90, l='Superflat', x=-137.15, y=18.97, z=-117.59]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

The way this happened to me was when I was near a Village on a superflat world. And the double slabs didn't even have redstone on top of them.