Rotating an electrolytic separator filled with water tries to insert hydrogen/oxygen into the generator, while there's still hydrogen/oxygen in it, crashing the game with

Inserting Oxygen into the generator will crash the game with:

java.lang.NullPointerException: Ticking block entity
at mekanism.common.FuelHandler.getFuel(FuelHandler.java:33)
at mekanism.generators.common.tile.TileEntityGasGenerator.canReceiveGas(TileEntityGasGenerator.java:296)
at mekanism.common.tile.TileEntityElectrolyticSeparator.onUpdate(TileEntityElectrolyticSeparator.java:225)
at mekanism.common.tile.TileEntityBasicBlock.func_145845_h(TileEntityBasicBlock.java:73)
at net.minecraft.world.World.func_72939_s(World.java:1939)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

Version: Mekanism-1.7.10-8.1.5.246.jar

@dbulm2 last I knew this has been fixed... You're running an older version. Please update.

@dbulm2 yup... it's been fixed: @aidancbrady responded in this issue: #2842