Bukkit

What steps will reproduce the problem?
1. Craft the timer
2. placing the ingredients on the grid, when the last item is placed you get internal server error and are kicked.

What is the expected output? What do you see instead?
I expect to get a redstone timer. An internal server error screen.

What version of the product are you using?
v1.2.2 on server dev build 1.7.2-R02

Do you have an error log of what happened?
Yes.

java.lang.NullPointerException
        at net.minecraft.server.v1_7_R1.ShapedRecipes.a(ShapedRecipes.java:136) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.CraftingManager.craft(CraftingManager.java:299) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ContainerWorkbench.a(ContainerWorkbench.java:59) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.InventoryCrafting.setItem(InventoryCrafting.java:129) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.Slot.set(Slot.java:51) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.Container.clickItem(Container.java:280) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:1356) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInWindowClick.a(SourceFile:32) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInWindowClick.handle(SourceFile:10) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) ~[craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit-beta.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]