[1.12][SSP]Chainsaw crashes

java.lang.NullPointerException
        at ic2.common.ItemElectricToolChainsaw.a(ItemElectricToolChainsaw.java:8
6)
        at ul.a(SourceFile:256)
        at ui.g(SourceFile:149)
        at sz.p(EntityPlayer.java:355)
        at qs.p(SourceFile:202)
        at wd.w_(EntityLiving.java:255)
        at sz.w_(EntityPlayer.java:167)
        at rv.a(World.java:1561)
        at rv.f(World.java:1537)
        at rv.l(World.java:1445)
        at net.minecraft.client.Minecraft.k(SourceFile:1384)
        at net.minecraft.client.Minecraft.run(SourceFile:666)
        at java.lang.Thread.run(Unknown Source)