Program: 174505
Project: 174505
Buggy source:
public EnumActionResult onItemUse(EntityPlayer playerIn,World worldIn,BlockPos pos,EnumHand hand,EnumFacing facing,float hitX,float hitY,float hitZ){
  if (!worldIn.isRemote) {
    if (worldIn.rand.nextInt(16) == 0) {
      ItemStack stack=playerIn.getHeldItem(hand);
      Entity spawningEntity=new EntitySteven(worldIn);
      spawningEntity.setPosition(pos.getX() + 0.5,pos.getY() + 1.0,pos.getZ() + 0.5);
      worldIn.spawnEntity(spawningEntity);
      if (!playerIn.capabilities.isCreativeMode) {
        stack.damageItem(1,playerIn);
      }
    }
 else {
      if (worldIn.rand.nextInt(3) == 0) {
        worldIn.setWorldTime(worldIn.rand.nextInt(24000) - 12000);
      }
 else       if (worldIn.rand.nextBoolean()) {
        if (worldIn.isRaining()) {
          worldIn.getWorldInfo().setCleanWeatherTime(worldIn.rand.nextInt(12000) + 1200);
          worldIn.getWorldInfo().setThunderTime(0);
          worldIn.getWorldInfo().setRainTime(0);
          worldIn.getWorldInfo().setRaining(false);
        }
 else {
          worldIn.getWorldInfo().setCleanWeatherTime(0);
          worldIn.getWorldInfo().setThunderTime(worldIn.rand.nextInt(12000) + 1200);
          worldIn.getWorldInfo().setRainTime(worldIn.rand.nextInt(12000) + 1200);
          worldIn.getWorldInfo().setRaining(true);
        }
      }
 else {
        for (int x=-4; x < 4; ++x) {
          for (int y=-4; y < 4; ++y) {
            for (int z=-4; z < 4; ++z) {
              BlockPos newp=pos.add(x,y,z);
              if (worldIn.rand.nextInt(3) != 0) {
                InjectorResult.drainBlock(worldIn,newp);
              }
            }
          }
        }
      }
    }
    return EnumActionResult.SUCCESS;
  }
  return EnumActionResult.PASS;
}

Fixed version (ground truth):
public EnumActionResult onItemUse(EntityPlayer playerIn,World worldIn,BlockPos pos,EnumHand hand,EnumFacing facing,float hitX,float hitY,float hitZ){
  if (!worldIn.isRemote) {
    if (worldIn.rand.nextInt(16) == 0) {
      ItemStack stack=playerIn.getHeldItem(hand);
      Entity spawningEntity=new EntitySteven(worldIn);
      spawningEntity.setPosition(pos.getX() + 0.5,pos.getY() + 1.0,pos.getZ() + 0.5);
      worldIn.spawnEntity(spawningEntity);
      if (!playerIn.capabilities.isCreativeMode) {
        stack.damageItem(1,playerIn);
      }
    }
 else {
      if (worldIn.rand.nextInt(3) == 0) {
        worldIn.setWorldTime(worldIn.rand.nextInt(24000) - 12000);
      }
 else       if (worldIn.rand.nextBoolean()) {
        if (worldIn.isRaining()) {
          worldIn.getWorldInfo().setCleanWeatherTime(worldIn.rand.nextInt(12000) + 12000);
          worldIn.getWorldInfo().setThunderTime(0);
          worldIn.getWorldInfo().setRainTime(0);
          worldIn.getWorldInfo().setRaining(false);
        }
 else {
          worldIn.getWorldInfo().setCleanWeatherTime(0);
          worldIn.getWorldInfo().setThunderTime(worldIn.rand.nextInt(12000) + 12000);
          worldIn.getWorldInfo().setRainTime(worldIn.rand.nextInt(12000) + 12000);
          worldIn.getWorldInfo().setRaining(true);
        }
      }
 else       if (worldIn.rand.nextBoolean()) {
        if (worldIn.rand.nextBoolean()) {
          worldIn.getWorldInfo().setWorldTime(worldIn.getWorldTime() + worldIn.rand.nextInt(12000) + 12000);
        }
 else {
          worldIn.getWorldInfo().setWorldTime(worldIn.getWorldTime() - worldIn.rand.nextInt(12000) + 12000);
        }
      }
 else {
        for (int x=-4; x < 4; ++x) {
          for (int y=-4; y < 4; ++y) {
            for (int z=-4; z < 4; ++z) {
              BlockPos newp=pos.add(x,y,z);
              if (worldIn.rand.nextInt(3) != 0) {
                InjectorResult.drainBlock(worldIn,newp);
              }
            }
          }
        }
      }
    }
    return EnumActionResult.SUCCESS;
  }
  return EnumActionResult.PASS;
}