Caused by: java.lang.NoClassDefFoundError: scala/actors/threadpool/Arrays
at logisticspipes.items.ItemUpgrade.func_77624_a(ItemUpgrade.java:325) ~[ItemUpgrade.class:0.9.0.9]
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:523) ~[add.class:?]
at net.minecraft.client.gui.inventory.GuiContainerCreative.updateFilteredItems(GuiContainerCreative.java:378) ~[bfl.class:?]
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147053_i(GuiContainerCreative.java:350) ~[bfl.class:?]
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147050_b(GuiContainerCreative.java:550) ~[bfl.class:?]
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146286_b(GuiContainerCreative.java:456) ~[bfl.class:?]
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:306) ~[bdw.class:?]