WORLDEDIT-2472 - Reported by xSkill_Cycanx

If i something //set and i need get //undo server crash. :( Sorry for my very ban english but i not englishman :D
Crash report:
---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 12/16/12 12:02 PM
Description: Exception ticking world entities

java.lang.NullPointerException
at net.minecraft.server.ItemStack.a(ItemStack.java:255)
at net.minecraft.server.EntityItem.getLocalizedName(EntityItem.java:247)
at net.minecraft.server.Entity.a(Entity.java:1768)
at net.minecraft.server.World.tickEntities(World.java:1200)
at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:444)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:577)
at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)

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

-- Head --
Stacktrace:
at net.minecraft.server.ItemStack.a(ItemStack.java:255)
at net.minecraft.server.EntityItem.getLocalizedName(EntityItem.java:247)
at net.minecraft.server.Entity.a(Entity.java:1768)
at net.minecraft.server.World.tickEntities(World.java:1200)
at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:444)

-- Affected level --
Details:
Level name: world
All players: 5 total; [EntityPlayer['vince77'/3008819, l='world', x=-0.70, y=32.00, z=342.70](vince77 at -0.6999999880790717,32.0,342.69999998807907), EntityPlayer['257denis'/4409084, l='world', x=28.31, y=37.00, z=339.48](257denis at 28.31384674843367,37.0,339.4804671402252), EntityPlayer['Mmonster00'/2308289, l='world', x=15.70, y=32.00, z=336.76](Mmonster00 at 15.699999988079075,32.0,336.7591040209978), EntityPlayer['MiRinKo'/4322105, l='world', x=13.37, y=32.50, z=338.24](MiRinKo at 13.373304757908777,32.5,338.2404739339843), EntityPlayer['chizfen'/2931488, l='world', x=9.91, y=32.50, z=338.27](chizfen at 9.911670415471152,32.5,338.26506386956703)]
Chunk stats: ServerChunkCache: 441 Drop: 0
Level seed: -5129991804423452435
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (63,84,335), Chunk: (at 15,5,15 in 3,20; contains blocks 48,0,320 to 63,255,335), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 6310266 game time, 6948424 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 111059 (now: false), thunder time: 143539 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:577)
at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
Please fix it :(

Comment by wizjany

need something more solid, preferably a WG report and/or copy of whatever was being undone
the only reason undo would create an EntityItem is if something popped off (like a door), but then ItemStack.byId returns null? has to be a non-existent item somehow...