Crashing whilst digging straight up!

With the Flux Pickaxe, in empowered mode. I have the Hyperenergetic Nitor in my inventory providing light.

Crashed quite a few times before the idea occured to me that it's mining the blocks directly above my head, and since I'm in a very confined space the Hyperenergetic Nitor's light block is at my head level, and so the Flux pick is trying to mine it. The client gets confused and crashes.

That's my theory, anyways. Here are logs:

Spoiler

Code:

2014-03-16 23:40:49 [INFO] [STDERR] java.lang.NullPointerException
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.block.Block.func_71880_c_(Block.java:1164)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.block.Block.func_71893_a(Block.java:1126)
2014-03-16 23:40:49 [INFO] [STDERR]    at redstonearsenal.item.tool.ItemToolRF.harvestBlock(ItemToolRF.java:83)
2014-03-16 23:40:49 [INFO] [STDERR]    at redstonearsenal.item.tool.ItemPickaxeRF.func_77660_a(ItemPickaxeRF.java:89)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.item.ItemStack.func_77941_a(ItemStack.java:403)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78751_a(PlayerControllerMP.java:174)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78759_c(PlayerControllerMP.java:293)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.Minecraft.func_71399_a(Minecraft.java:1319)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1882)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.client.main.Main.main(SourceFile:101)
2014-03-16 23:40:49 [INFO] [STDERR]    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2014-03-16 23:40:49 [INFO] [STDERR]    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDERR]    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDERR]    at java.lang.reflect.Method.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
2014-03-16 23:40:49 [INFO] [STDERR]    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
2014-03-16 23:40:49 [INFO] [STDOUT] ---- Minecraft Crash Report ----
2014-03-16 23:40:49 [INFO] [STDOUT] // Would you like a cupcake?
2014-03-16 23:40:49 [INFO] [STDOUT]
2014-03-16 23:40:49 [INFO] [STDOUT] Time: 3/16/14 11:40 PM
2014-03-16 23:40:49 [INFO] [STDOUT] Description: Unexpected error
2014-03-16 23:40:49 [INFO] [STDOUT]
2014-03-16 23:40:49 [INFO] [STDOUT] java.lang.NullPointerException
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.block.Block.func_71880_c_(Block.java:1164)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.block.Block.func_71893_a(Block.java:1126)
2014-03-16 23:40:49 [INFO] [STDOUT]    at redstonearsenal.item.tool.ItemToolRF.harvestBlock(ItemToolRF.java:83)
2014-03-16 23:40:49 [INFO] [STDOUT]    at redstonearsenal.item.tool.ItemPickaxeRF.func_77660_a(ItemPickaxeRF.java:89)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.item.ItemStack.func_77941_a(ItemStack.java:403)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78751_a(PlayerControllerMP.java:174)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78759_c(PlayerControllerMP.java:293)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.Minecraft.func_71399_a(Minecraft.java:1319)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1882)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.client.main.Main.main(SourceFile:101)
2014-03-16 23:40:49 [INFO] [STDOUT]    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2014-03-16 23:40:49 [INFO] [STDOUT]    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDOUT]    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDOUT]    at java.lang.reflect.Method.invoke(Unknown Source)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
2014-03-16 23:40:49 [INFO] [STDOUT]    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)