Random Stacktrace has appeared

[Andrew Jawa]

java.util.concurrent.ExecutionException: java.lang.NullPointerException                                                                                                         │
        at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_45-internal]                                                                                   │
        at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_45-internal]                                                                                      │
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:61) [spigot.jar:git-Spigot-1d14d5f-7722428]                                                                    │
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [spigot.jar:git-Spigot-1d14d5f-7722428]                                                     │
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot.jar:git-Spigot-1d14d5f-7722428]                                                     │
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot.jar:git-Spigot-1d14d5f-7722428]                                                     │
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-1d14d5f-7722428]                                                   │
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45-internal]                                                                                                          │
Caused by: java.lang.NullPointerException                                                                                                                                       │
        at net.minecraft.server.v1_8_R2.ShapedRecipes.a(ShapedRecipes.java:150) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                        │
        at net.minecraft.server.v1_8_R2.CraftingManager.craft(CraftingManager.java:297) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                │
        at net.minecraft.server.v1_8_R2.ContainerWorkbench.a(ContainerWorkbench.java:56) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                               │
        at net.minecraft.server.v1_8_R2.InventoryCrafting.setItem(InventoryCrafting.java:129) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                          │
        at net.minecraft.server.v1_8_R2.Slot.set(Slot.java:55) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                                         │
        at net.minecraft.server.v1_8_R2.Container.clickItem(Container.java:285) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                        │
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:1625) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                 │
        at net.minecraft.server.v1_8_R2.PacketPlayInWindowClick.a(SourceFile:31) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                       │
        at net.minecraft.server.v1_8_R2.PacketPlayInWindowClick.a(SourceFile:9) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                        │
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                     │
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_45-internal]                                                                       │
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_45-internal]                                                                                      │
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) ~[spigot.jar:git-Spigot-1d14d5f-7722428]                                                                   │
        ... 5 more