Program: 58381
Project: 58381
Buggy source:
@Override public void onPlayerStoppedUsing(ItemStack stack,World world,EntityLivingBase livingBase,int timeLeft){
  if (livingBase instanceof EntityPlayer) {
    EntityPlayer player=(EntityPlayer)livingBase;
    ItemStack arrowStack=this.findAmmo(player);
    boolean flag=player.capabilities.isCreativeMode || (arrowStack.getItem() instanceof ItemArrow && ((ItemArrow)arrowStack.getItem()).isInfinite(arrowStack,stack,player));
    int charge=this.getMaxItemUseDuration(stack) - timeLeft;
    charge=net.minecraftforge.event.ForgeEventFactory.onArrowLoose(stack,world,(EntityPlayer)livingBase,charge,!arrowStack.isEmpty() || flag);
    if (charge < 0) {
      return;
    }
    if (!arrowStack.isEmpty() || flag) {
      if (arrowStack.isEmpty()) {
        arrowStack=new ItemStack(Items.ARROW);
      }
      float f=getArrowVelocity(charge);
      float speedMod=1.0F + arrowSpeedMultiplier;
      if ((double)f >= 0.1D) {
        if (!world.isRemote) {
          int encMultishot=MathHelper.clamp(EnchantmentHelper.getEnchantmentLevel(CoreEnchantments.multishot,stack),0,10);
          int encPunch=EnchantmentHelper.getEnchantmentLevel(Enchantments.PUNCH,stack);
          int encPower=EnchantmentHelper.getEnchantmentLevel(Enchantments.POWER,stack);
          boolean encFlame=EnchantmentHelper.getEnchantmentLevel(Enchantments.FLAME,stack) > 0;
          onBowFired(player,stack);
          ItemArrow arrowItem=(ItemArrow)(arrowStack.getItem() instanceof ItemArrow ? arrowStack.getItem() : Items.ARROW);
          for (int shot=0; shot <= encMultishot; shot++) {
            EntityArrow arrow=arrowItem.createArrow(world,arrowStack,player);
            arrow.setAim(player,player.rotationPitch,player.rotationYaw,0.0F,f * 3.0F * speedMod,1.0F + (1.5F - f) * shot);
            arrow.setDamage(arrow.getDamage() * (1 + arrowDamageMultiplier));
            if (f >= 1.0F) {
              arrow.setIsCritical(true);
            }
            if (encPower > 0) {
              arrow.setDamage(arrow.getDamage() + (double)encPower * 0.5D + 0.5D);
            }
            if (encPunch > 0) {
              arrow.setKnockbackStrength(encPunch);
            }
            if (encFlame) {
              arrow.setFire(100);
            }
            if (flag) {
              arrow.pickupStatus=EntityArrow.PickupStatus.CREATIVE_ONLY;
            }
            world.spawnEntity(arrow);
          }
          stack.damageItem(1,player);
        }
        world.playSound(null,player.posX,player.posY,player.posZ,SoundEvents.ENTITY_ARROW_SHOOT,SoundCategory.PLAYERS,1.0F,1.0F / (itemRand.nextFloat() * 0.4F + 1.2F) + f * 0.5F);
        if (!flag) {
          arrowStack.shrink(1);
          if (arrowStack.getCount() == 0) {
            player.inventory.deleteStack(arrowStack);
          }
        }
        player.addStat(StatList.getObjectUseStats(this));
      }
    }
  }
}

Fixed version (ground truth):
@Override public void onPlayerStoppedUsing(ItemStack stack,World world,EntityLivingBase livingBase,int timeLeft){
  if (livingBase instanceof EntityPlayer) {
    EntityPlayer player=(EntityPlayer)livingBase;
    ItemStack arrowStack=this.findAmmo(player);
    boolean flag=player.capabilities.isCreativeMode || (arrowStack.getItem() instanceof ItemArrow && ((ItemArrow)arrowStack.getItem()).isInfinite(arrowStack,stack,player));
    int charge=this.getMaxItemUseDuration(stack) - timeLeft;
    charge=net.minecraftforge.event.ForgeEventFactory.onArrowLoose(stack,world,(EntityPlayer)livingBase,charge,!arrowStack.isEmpty() || flag);
    if (charge < 0) {
      return;
    }
    if (!arrowStack.isEmpty() || flag) {
      if (arrowStack.isEmpty()) {
        arrowStack=new ItemStack(Items.ARROW);
      }
      float f=getArrowVelocity(charge);
      float speedMod=1.0F + arrowSpeedMultiplier;
      if ((double)f >= 0.1D) {
        if (!world.isRemote) {
          int encMultishot=MathHelper.clamp(EnchantmentHelper.getEnchantmentLevel(CoreEnchantments.multishot,stack),0,10);
          int encPunch=EnchantmentHelper.getEnchantmentLevel(Enchantments.PUNCH,stack);
          int encPower=EnchantmentHelper.getEnchantmentLevel(Enchantments.POWER,stack);
          boolean encFlame=EnchantmentHelper.getEnchantmentLevel(Enchantments.FLAME,stack) > 0;
          onBowFired(player,stack);
          ItemArrow arrowItem=(ItemArrow)(arrowStack.getItem() instanceof ItemArrow ? arrowStack.getItem() : Items.ARROW);
          for (int shot=0; shot <= encMultishot; shot++) {
            EntityArrow arrow=arrowItem.createArrow(world,arrowStack,player);
            arrow.setAim(player,player.rotationPitch,player.rotationYaw,0.0F,f * 3.0F * speedMod,1.0F + (1.5F - f) * shot);
            arrow.setDamage(arrow.getDamage() * (1 + arrowDamageMultiplier));
            if (f >= 1.0F) {
              arrow.setIsCritical(true);
            }
            if (encPower > 0) {
              arrow.setDamage(arrow.getDamage() + (double)encPower * 0.5D + 0.5D);
            }
            if (encPunch > 0) {
              arrow.setKnockbackStrength(encPunch);
            }
            if (encFlame) {
              arrow.setFire(100);
            }
            if (flag || shot > 0) {
              arrow.pickupStatus=EntityArrow.PickupStatus.CREATIVE_ONLY;
            }
            world.spawnEntity(arrow);
          }
          stack.damageItem(1,player);
        }
        world.playSound(null,player.posX,player.posY,player.posZ,SoundEvents.ENTITY_ARROW_SHOOT,SoundCategory.PLAYERS,1.0F,1.0F / (itemRand.nextFloat() * 0.4F + 1.2F) + f * 0.5F);
        if (!flag) {
          arrowStack.shrink(1);
          if (arrowStack.getCount() == 0) {
            player.inventory.deleteStack(arrowStack);
          }
        }
        player.addStat(StatList.getObjectUseStats(this));
      }
    }
  }
}