Mandel Cube

Same problem here.

I have an automatic wheat farm with a couple standard hopper minecart unloading stations.

"Thanks" to bug 88668 ( https://bugs.mojang.com/browse/MC-88668 ) my hopper minecarts are actually empty, but any time I enable them to pick up items or directly put items inside the game crashes as soon as one of them reach the unloading station.

My error is almost identical (except it says "repeater" instead of "comparator").

Minecraft Crash Report ----
// Would you like a cupcake?

Time: 14/11/15 17.04
Description: Exception while updating neighbours

java.lang.IllegalArgumentException: Cannot get property arg{name=shape, clazz=class ajh$b, values=[north_south, east_west, ascending_east, ascending_west, ascending_north, ascending_south]} as it does not exist in aqu{block=minecraft:unpowered_comparator, properties=[facing, mode, powered]}
at aqu$a.c(SourceFile:165)
at ane.a(SourceFile:115)
at ane.a(SourceFile:102)
at ane.b(SourceFile:136)
at ajh.a(SourceFile:454)
at ahm.e(SourceFile:447)
at ahm.a(SourceFile:436)
at akj.h(SourceFile:209)
at ant.b(SourceFile:130)
at arv.a(SourceFile:441)
at ahm.a(SourceFile:312)
at akj.b(SourceFile:68)
at lp.a(SourceFile:646)
at lp.d(SourceFile:215)
at net.minecraft.server.MinecraftServer.D(SourceFile:616)
at net.minecraft.server.MinecraftServer.C(SourceFile:552)
at bxw.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:456)
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 aqu$a.c(SourceFile:165)
at ane.a(SourceFile:115)
at ane.a(SourceFile:102)
at ane.b(SourceFile:136)
at ajh.a(SourceFile:454)

– Block being updated –
Details:
Source block type: ID #94 (tile.diode // ant)
Block: minecraft:golden_rail[powered=true,shape=north_south]
Block location: World: (473,89,-549), Chunk: (at 9,5,11 in 29,-35; contains blocks 464,0,-560 to 479,255,-545), Region: (0,-2; contains chunks 0,-64 to 31,-33, blocks 0,0,-1024 to 511,255,-513)
Stacktrace:
at ahm.e(SourceFile:447)
at ahm.a(SourceFile:436)
at akj.h(SourceFile:209)
at ant.b(SourceFile:130)
at arv.a(SourceFile:441)
at ahm.a(SourceFile:312)
at akj.b(SourceFile:68)

– Block being ticked –
Details:
Block: minecraft:powered_repeater[delay=1,facing=north,locked=false]
Block location: World: (473,89,-551), Chunk: (at 9,5,9 in 29,-35; contains blocks 464,0,-560 to 479,255,-545), Region: (0,-2; contains chunks 0,-64 to 31,-33, blocks 0,0,-1024 to 511,255,-513)
Stacktrace:
at lp.a(SourceFile:646)
at lp.d(SourceFile:215)

– Affected level –
Details:
Level name: Let's play
All players: 1 total; [lr['MandelCube'/112, l='Let's play', x=533,35, y=47,00, z=-417,30]]
Chunk stats: ServerChunkCache: 960 Drop: 0
Level seed: 2470347526754821213
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (200,64,240), Chunk: (at 8,4,0 in 12,15; contains blocks 192,0,240 to 207,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 10966632 game time, 14509670 day time
Level dimension: 1
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 25734 (now: false), thunder time: 27095 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:616)
at net.minecraft.server.MinecraftServer.C(SourceFile:552)
at bxw.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:456)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 15w46a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 251321552 bytes (239 MB) / 473972736 bytes (452 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.h​eapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [lr['MandelCube'/112, l='Let's play', x=533,35, y=47,00, z=-417,30]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

That's not a bug.
When powering a line of redstone the order in which each piece update (in the same game tick) is pretty much random.

Your circuit give you (because you are the nearest player) part of the stuff, than teleport you and the rest to your friend (beacause now HE is the nearest player).

Work as intended, fix your circuit