Program: 133809
Project: 133809
Buggy source:
@EventHandler(priority=EventPriority.NORMAL,ignoreCancelled=true) public void onPlayerSneak(PlayerToggleSneakEvent event){
  Player player=event.getPlayer();
  BendingPlayer bPlayer=BendingPlayer.getBendingPlayer(player);
  if (event.isCancelled() || bPlayer == null) {
    return;
  }
  if (player.isSneaking()) {
    ComboManager.addComboAbility(player,ClickType.SHIFT_UP);
  }
 else {
    ComboManager.addComboAbility(player,ClickType.SHIFT_DOWN);
  }
  String abilName=bPlayer.getBoundAbilityName();
  if (Suffocate.isBreathbent(player)) {
    if (!abilName.equalsIgnoreCase("String_Node_Str") || !abilName.equalsIgnoreCase("String_Node_Str") || !abilName.equalsIgnoreCase("String_Node_Str")|| !abilName.equalsIgnoreCase("String_Node_Str")) {
      if (!player.isSneaking()) {
        event.setCancelled(true);
      }
    }
  }
  if (Paralyze.isParalyzed(player) || ChiCombo.isParalyzed(player) || Bloodbending.isBloodbent(player)) {
    event.setCancelled(true);
    return;
  }
  if (!player.isSneaking()) {
    BlockSource.update(player,ClickType.SHIFT_DOWN);
  }
  AirScooter.check(player);
  CoreAbility coreAbil=bPlayer.getBoundAbility();
  String abil=bPlayer.getBoundAbilityName();
  if (coreAbil == null) {
    return;
  }
  if (bPlayer.isChiBlocked()) {
    event.setCancelled(true);
    return;
  }
  if (!player.isSneaking() && bPlayer.canBendIgnoreCooldowns(coreAbil)) {
    if (coreAbil instanceof AddonAbility) {
      return;
    }
    if (coreAbil instanceof AirAbility && bPlayer.isElementToggled(Element.AIR) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Tornado(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        AirBlast.setOrigin(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirBurst(player,false);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        AirSuction.setOrigin(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirSwipe(player,true);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirShield(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Suffocate(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        if (player.isSneaking() || !bPlayer.canUseFlight()) {
          return;
        }
        new AirFlight(player);
      }
    }
    if (coreAbil instanceof WaterAbility && bPlayer.isElementToggled(Element.WATER) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Bloodbending(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new IceBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new IceSpikeBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        OctopusForm.form(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        if (!CoreAbility.hasAbility(player,PhaseChange.class)) {
          new PhaseChange(player,PhaseChangeType.MELT);
        }
 else {
          PhaseChange pc=CoreAbility.getAbility(player,PhaseChange.class);
          pc.startNewType(PhaseChangeType.MELT);
        }
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new WaterManipulation(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        SurgeWall.form(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        Torrent.create(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new WaterArms(player);
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new HealingWaters(player);
      }
    }
    if (coreAbil instanceof EarthAbility && bPlayer.isElementToggled(Element.EARTH) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthArmor(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new RaiseEarthWall(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new CollapseWall(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Shockwave(player,false);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthTunnel(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        bPlayer.toggleTremorSense();
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Extraction(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        MetalClips clips=CoreAbility.getAbility(player,MetalClips.class);
        if (clips != null) {
          if (clips.getTargetEntity() == null) {
            clips.setMagnetized(true);
          }
 else {
            clips.setControlling(true);
          }
        }
 else {
          new MetalClips(player,1);
        }
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new LavaFlow(player,LavaFlow.AbilityType.SHIFT);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthSmash(player,ClickType.SHIFT_DOWN);
      }
    }
    if (coreAbil instanceof FireAbility && bPlayer.isElementToggled(Element.FIRE) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new BlazeRing(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireBlastCharged(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new HeatControl(player,HeatControlType.COOK);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireBurst(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireShield(player,true);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Lightning(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Combustion(player);
      }
    }
  }
}

Fixed version (ground truth):
@EventHandler(priority=EventPriority.NORMAL,ignoreCancelled=true) public void onPlayerSneak(PlayerToggleSneakEvent event){
  Player player=event.getPlayer();
  BendingPlayer bPlayer=BendingPlayer.getBendingPlayer(player);
  if (event.isCancelled() || bPlayer == null) {
    return;
  }
  if (CoreAbility.hasAbility(event.getPlayer(),AirScooter.class)) {
    event.setCancelled(true);
    return;
  }
  if (player.isSneaking()) {
    ComboManager.addComboAbility(player,ClickType.SHIFT_UP);
  }
 else {
    ComboManager.addComboAbility(player,ClickType.SHIFT_DOWN);
  }
  String abilName=bPlayer.getBoundAbilityName();
  if (Suffocate.isBreathbent(player)) {
    if (!abilName.equalsIgnoreCase("String_Node_Str") || !abilName.equalsIgnoreCase("String_Node_Str") || !abilName.equalsIgnoreCase("String_Node_Str")|| !abilName.equalsIgnoreCase("String_Node_Str")) {
      if (!player.isSneaking()) {
        event.setCancelled(true);
      }
    }
  }
  if (Paralyze.isParalyzed(player) || ChiCombo.isParalyzed(player) || Bloodbending.isBloodbent(player)) {
    event.setCancelled(true);
    return;
  }
  if (!player.isSneaking()) {
    BlockSource.update(player,ClickType.SHIFT_DOWN);
  }
  AirScooter.check(player);
  CoreAbility coreAbil=bPlayer.getBoundAbility();
  String abil=bPlayer.getBoundAbilityName();
  if (coreAbil == null) {
    return;
  }
  if (bPlayer.isChiBlocked()) {
    event.setCancelled(true);
    return;
  }
  if (!player.isSneaking() && bPlayer.canBendIgnoreCooldowns(coreAbil)) {
    if (coreAbil instanceof AddonAbility) {
      return;
    }
    if (coreAbil instanceof AirAbility && bPlayer.isElementToggled(Element.AIR) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Tornado(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        AirBlast.setOrigin(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirBurst(player,false);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        AirSuction.setOrigin(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirSwipe(player,true);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new AirShield(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Suffocate(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        if (player.isSneaking() || !bPlayer.canUseFlight()) {
          return;
        }
        new AirFlight(player);
      }
    }
    if (coreAbil instanceof WaterAbility && bPlayer.isElementToggled(Element.WATER) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Bloodbending(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new IceBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new IceSpikeBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        OctopusForm.form(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        if (!CoreAbility.hasAbility(player,PhaseChange.class)) {
          new PhaseChange(player,PhaseChangeType.MELT);
        }
 else {
          PhaseChange pc=CoreAbility.getAbility(player,PhaseChange.class);
          pc.startNewType(PhaseChangeType.MELT);
        }
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new WaterManipulation(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        SurgeWall.form(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        Torrent.create(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new WaterArms(player);
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new HealingWaters(player);
      }
    }
    if (coreAbil instanceof EarthAbility && bPlayer.isElementToggled(Element.EARTH) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthBlast(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthArmor(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new RaiseEarthWall(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new CollapseWall(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Shockwave(player,false);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthTunnel(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        bPlayer.toggleTremorSense();
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Extraction(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        MetalClips clips=CoreAbility.getAbility(player,MetalClips.class);
        if (clips != null) {
          if (clips.getTargetEntity() == null) {
            clips.setMagnetized(true);
          }
 else {
            clips.setControlling(true);
          }
        }
 else {
          new MetalClips(player,1);
        }
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new LavaFlow(player,LavaFlow.AbilityType.SHIFT);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new EarthSmash(player,ClickType.SHIFT_DOWN);
      }
    }
    if (coreAbil instanceof FireAbility && bPlayer.isElementToggled(Element.FIRE) == true) {
      if (GeneralMethods.isWeapon(player.getInventory().getItemInMainHand().getType()) && !plugin.getConfig().getBoolean("String_Node_Str")) {
        return;
      }
      if (abil.equalsIgnoreCase("String_Node_Str")) {
        new BlazeRing(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireBlastCharged(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new HeatControl(player,HeatControlType.COOK);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireBurst(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new FireShield(player,true);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Lightning(player);
      }
 else       if (abil.equalsIgnoreCase("String_Node_Str")) {
        new Combustion(player);
      }
    }
  }
}