Forestry forestry.apiculture.FlowerProviderVanilla.isAcceptedFlower crash forestry-1.4.8.6-mcpc1.2.5.zip

gistfile1.txt

15:03:42 [SEVERE] java.lang.NullPointerException
15:03:42 [SEVERE]       at net.minecraft.server.ItemStack.setData(ItemStack.java:153)
15:03:42 [SEVERE]       at net.minecraft.server.ItemStack.<init>(ItemStack.java:39)
15:03:42 [SEVERE]       at forestry.apiculture.FlowerProviderVanilla.isAcceptedFlower(FlowerProviderVanilla.java:17)
15:03:42 [SEVERE]       at forestry.apiculture.genetics.Bee.hasFlower(Bee.java:286)
15:03:42 [SEVERE]       at forestry.apiculture.MachineApiary.updateServerSide(MachineApiary.java:292)
15:03:42 [SEVERE]       at forestry.core.gadgets.TileMachine.q_(TileMachine.java:152)
15:03:42 [SEVERE]       at net.minecraft.server.World.tickEntities(World.java:1189)
15:03:42 [SEVERE]       at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:559)
15:03:42 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:457)
15:03:42 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Severe exception detected! Attempting to restart the server...
15:03:42 [SEVERE] Unexpected exception
java.lang.NullPointerException
        at net.minecraft.server.ItemStack.setData(ItemStack.java:153)
        at net.minecraft.server.ItemStack.<init>(ItemStack.java:39)
        at forestry.apiculture.FlowerProviderVanilla.isAcceptedFlower(FlowerProviderVanilla.java:17)
        at forestry.apiculture.genetics.Bee.hasFlower(Bee.java:286)
        at forestry.apiculture.MachineApiary.updateServerSide(MachineApiary.java:292)
        at forestry.core.gadgets.TileMachine.q_(TileMachine.java:152)
        at net.minecraft.server.World.tickEntities(World.java:1189)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:559)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:457)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Forcing a save... (Shutdown delayed)