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net.minecraft.util.ReportedException: Ticking entity at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:707)[MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344)[ko.class:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605)[MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481)[MinecraftServer.class:?] at java.lang.Thread.run(Unknown Source)[?:1.8.0_51]Caused by: java.lang.IllegalArgumentException: Cannot get property PropertyEnum{name=variant, clazz=class net.minecraft.block.BlockStone$EnumType, values=[stone, gr at net.minecraft.block.state.BlockState$StateImplementation.func_177229_b(BlockState.java:137)[ama$a.class:?] at net.minecraft.block.BlockStone.func_176201_c(SourceFile:66)[ajy.class:?] at net.minecraft.block.Block.getHarvestTool(Block.java:2024)[afh.class:?] at net.minecraftforge.common.ForgeHooks.canHarvestBlock(ForgeHooks.java:133)[ForgeHooks.class:?] at net.minecraft.block.Block.canHarvestBlock(Block.java:1189)[afh.class:?] at net.minecraft.server.management.ItemInWorldManager.func_180237_b(ItemInWorldManager.java:297)[lg.class:?] at net.minecraft.server.management.ItemInWorldManager.func_73075_a(ItemInWorldManager.java:104)[lg.class:?] at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:217)[lf.class:?] at net.minecraft.world.World.func_72866_a(World.java:1860)[adm.class:?] at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:699)[le.class:?] at net.minecraft.world.World.func_72870_g(World.java:1829)[adm.class:?] at net.minecraft.world.World.func_72939_s(World.java:1661)[adm.class:?] at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:544)[le.class:?] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:701)[MinecraftServer.class:?] ... 4 more