Program: 17654
Project: 17654
Buggy source:
@Subscribe public void preInit(FMLPreInitializationEvent event){
  blaze_hopper=registerBlock(new BlockBlazeHopper(),"String_Node_Str");
  materials=registerItem(new ItemMetaDynamic(),"String_Node_Str");
  empty_bowls=registerItem(new ItemMetaDynamic(),"String_Node_Str");
  edibles=registerItem(new ItemNaturaEdible(),"String_Node_Str");
  soups=registerItem(new ItemEdibleSoup(),"String_Node_Str");
  materials.setCreativeTab(NaturaRegistry.tabGeneral);
  empty_bowls.setCreativeTab(NaturaRegistry.tabGeneral);
  edibles.setCreativeTab(NaturaRegistry.tabGeneral);
  soups.setCreativeTab(NaturaRegistry.tabGeneral);
  barley=materials.addMeta(0,"String_Node_Str");
  barleyFlour=materials.addMeta(1,"String_Node_Str");
  wheatFlour=materials.addMeta(2,"String_Node_Str");
  cotton=materials.addMeta(3,"String_Node_Str");
  sulfurPowder=materials.addMeta(4,"String_Node_Str");
  ghostwoodFletching=materials.addMeta(5,"String_Node_Str");
  blueDye=materials.addMeta(8,"String_Node_Str");
  if (isEntitiesLoaded()) {
    impLeather=materials.addMeta(6,"String_Node_Str");
    flameString=materials.addMeta(7,"String_Node_Str");
    impmeatRaw=edibles.addFood(0,3,0.2f,"String_Node_Str",new PotionEffect(MobEffects.HUNGER,8 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0));
    impmeatCooked=edibles.addFood(1,8,0.6f,"String_Node_Str",new PotionEffect(MobEffects.FIRE_RESISTANCE,15 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0));
  }
  if (isOverworldLoaded()) {
    raspberry=edibles.addFood(2,1,0.4F,"String_Node_Str",true);
    blueberry=edibles.addFood(3,1,0.4F,"String_Node_Str",true);
    blackberry=edibles.addFood(4,1,0.4F,"String_Node_Str",true);
    maloberry=edibles.addFood(5,1,0.4F,"String_Node_Str",true);
    berryMedley=soups.addFood(9,5,1.4F,"String_Node_Str",new ItemStack(Items.BOWL));
  }
  if (isNetherLoaded()) {
    blightberry=edibles.addFood(6,1,0.4F,"String_Node_Str",new PotionEffect(MobEffects.REGENERATION,8 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0),new PotionEffect(MobEffects.WITHER,5 * 20,0));
    duskberry=edibles.addFood(7,1,0.4F,"String_Node_Str",new PotionEffect(MobEffects.NIGHT_VISION,15 * 20,0),new PotionEffect(MobEffects.BLINDNESS,3 * 20,0));
    skyberry=edibles.addFood(8,1,0.4F,"String_Node_Str",new PotionEffect(MobEffects.JUMP_BOOST,8 * 20,0),new PotionEffect(MobEffects.SLOWNESS,3 * 20,0));
    stingberry=edibles.addFood(9,1,0.4F,"String_Node_Str",new PotionEffect(MobEffects.STRENGTH,10 * 20,0),new PotionEffect(MobEffects.MINING_FATIGUE,10 * 20,0));
  }
  ghostwood_emptybowl=empty_bowls.addMeta(0,"String_Node_Str");
  bloodwood_emptybowl=empty_bowls.addMeta(1,"String_Node_Str");
  darkwood_emptybowl=empty_bowls.addMeta(2,"String_Node_Str");
  fusewood_emptybowl=empty_bowls.addMeta(3,"String_Node_Str");
  ghostwood_mushroomstew=soups.addFood(0,6,0.6f,"String_Node_Str",ghostwood_emptybowl);
  bloodwood_mushroomstew=soups.addFood(1,6,0.6f,"String_Node_Str",bloodwood_emptybowl);
  darkwood_mushroomstew=soups.addFood(2,6,0.6f,"String_Node_Str",darkwood_emptybowl);
  fusewood_mushroomstew=soups.addFood(3,6,0.6f,"String_Node_Str",fusewood_emptybowl);
  vanilla_glowshroomstew=soups.addFood(4,6,0.6f,"String_Node_Str",new ItemStack(Items.BOWL),new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  ghostwood_glowshroomstew=soups.addFood(5,6,0.6f,"String_Node_Str",ghostwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  bloodwood_glowshroomstew=soups.addFood(6,3,0.2f,"String_Node_Str",bloodwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  darkwood_glowshroomstew=soups.addFood(7,3,0.2f,"String_Node_Str",darkwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  fusewood_glowshroomstew=soups.addFood(8,3,0.2f,"String_Node_Str",fusewood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  proxy.preInit();
  NaturaRegistry.tabGeneral.setDisplayIcon(cotton);
}

Fixed version (ground truth):
@Subscribe public void preInit(FMLPreInitializationEvent event){
  blaze_hopper=registerBlock(new BlockBlazeHopper(),"String_Node_Str");
  materials=registerItem(new ItemMetaDynamic(),"String_Node_Str");
  empty_bowls=registerItem(new ItemMetaDynamic(),"String_Node_Str");
  edibles=registerItem(new ItemNaturaEdible(),"String_Node_Str");
  soups=registerItem(new ItemEdibleSoup(),"String_Node_Str");
  materials.setCreativeTab(NaturaRegistry.tabGeneral);
  empty_bowls.setCreativeTab(NaturaRegistry.tabGeneral);
  edibles.setCreativeTab(NaturaRegistry.tabGeneral);
  soups.setCreativeTab(NaturaRegistry.tabGeneral);
  barley=materials.addMeta(0,"String_Node_Str");
  barleyFlour=materials.addMeta(1,"String_Node_Str");
  wheatFlour=materials.addMeta(2,"String_Node_Str");
  cotton=materials.addMeta(3,"String_Node_Str");
  sulfurPowder=materials.addMeta(4,"String_Node_Str");
  ghostwoodFletching=materials.addMeta(5,"String_Node_Str");
  blueDye=materials.addMeta(8,"String_Node_Str");
  if (isEntitiesLoaded()) {
    impLeather=materials.addMeta(6,"String_Node_Str");
    flameString=materials.addMeta(7,"String_Node_Str");
    impmeatRaw=edibles.addFood(0,3,0.2f,32,"String_Node_Str",new PotionEffect(MobEffects.HUNGER,8 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0));
    impmeatCooked=edibles.addFood(1,8,0.6f,32,"String_Node_Str",new PotionEffect(MobEffects.FIRE_RESISTANCE,15 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0));
  }
  if (isOverworldLoaded()) {
    raspberry=edibles.addFood(2,1,0.4F,16,"String_Node_Str",true);
    blueberry=edibles.addFood(3,1,0.4F,16,"String_Node_Str",true);
    blackberry=edibles.addFood(4,1,0.4F,16,"String_Node_Str",true);
    maloberry=edibles.addFood(5,1,0.4F,16,"String_Node_Str",true);
    berryMedley=soups.addFood(9,5,1.4F,"String_Node_Str",new ItemStack(Items.BOWL));
  }
  if (isNetherLoaded()) {
    blightberry=edibles.addFood(6,1,0.4F,16,"String_Node_Str",new PotionEffect(MobEffects.REGENERATION,8 * 20,0),new PotionEffect(MobEffects.POISON,5 * 20,0),new PotionEffect(MobEffects.WITHER,5 * 20,0));
    duskberry=edibles.addFood(7,1,0.4F,16,"String_Node_Str",new PotionEffect(MobEffects.NIGHT_VISION,15 * 20,0),new PotionEffect(MobEffects.BLINDNESS,3 * 20,0));
    skyberry=edibles.addFood(8,1,0.4F,16,"String_Node_Str",new PotionEffect(MobEffects.JUMP_BOOST,8 * 20,0),new PotionEffect(MobEffects.SLOWNESS,3 * 20,0));
    stingberry=edibles.addFood(9,1,0.4F,16,"String_Node_Str",new PotionEffect(MobEffects.STRENGTH,10 * 20,0),new PotionEffect(MobEffects.MINING_FATIGUE,10 * 20,0));
  }
  ghostwood_emptybowl=empty_bowls.addMeta(0,"String_Node_Str");
  bloodwood_emptybowl=empty_bowls.addMeta(1,"String_Node_Str");
  darkwood_emptybowl=empty_bowls.addMeta(2,"String_Node_Str");
  fusewood_emptybowl=empty_bowls.addMeta(3,"String_Node_Str");
  ghostwood_mushroomstew=soups.addFood(0,6,0.6f,"String_Node_Str",ghostwood_emptybowl);
  bloodwood_mushroomstew=soups.addFood(1,6,0.6f,"String_Node_Str",bloodwood_emptybowl);
  darkwood_mushroomstew=soups.addFood(2,6,0.6f,"String_Node_Str",darkwood_emptybowl);
  fusewood_mushroomstew=soups.addFood(3,6,0.6f,"String_Node_Str",fusewood_emptybowl);
  vanilla_glowshroomstew=soups.addFood(4,6,0.6f,"String_Node_Str",new ItemStack(Items.BOWL),new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  ghostwood_glowshroomstew=soups.addFood(5,6,0.6f,"String_Node_Str",ghostwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  bloodwood_glowshroomstew=soups.addFood(6,3,0.2f,"String_Node_Str",bloodwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  darkwood_glowshroomstew=soups.addFood(7,3,0.2f,"String_Node_Str",darkwood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  fusewood_glowshroomstew=soups.addFood(8,3,0.2f,"String_Node_Str",fusewood_emptybowl,new PotionEffect(MobEffects.NIGHT_VISION,45 * 25,0),new PotionEffect(MobEffects.POISON,16 * 25,0),new PotionEffect(MobEffects.MINING_FATIGUE,8 * 25,0));
  proxy.preInit();
  NaturaRegistry.tabGeneral.setDisplayIcon(cotton);
}