Program: 187517
Project: 187517
Buggy source:
@Override public boolean shouldStart(){
  if (controlPathfinderGoal == null) {
    if (petEntity.petPathfinderSelector.hasGoal("String_Node_Str")) {
      controlPathfinderGoal=(Control)petEntity.petPathfinderSelector.getGoal("String_Node_Str");
    }
  }
  if (controlPathfinderGoal == null) {
    return false;
  }
  if (myPet.getDamage() <= 0 && myPet.getRangedDamage() <= 0) {
    return false;
  }
  if (controlPathfinderGoal.moveTo != null && petEntity.canMove()) {
    Behavior behaviorSkill=null;
    if (myPet.getSkills().isSkillActive(Behavior.class)) {
      behaviorSkill=myPet.getSkills().getSkill(Behavior.class);
      if (behaviorSkill.getBehavior() == Behavior.BehaviorState.Friendly) {
        return false;
      }
    }
    for (    Object entityObj : this.petEntity.world.a(EntityLiving.class,this.petEntity.boundingBox.grow((double)this.range,4.0D,(double)this.range))) {
      EntityLiving entityLiving=(EntityLiving)entityObj;
      if (entityLiving != petEntity) {
        if (entityLiving instanceof EntityPlayer) {
          Player targetPlayer=(Player)entityLiving.getBukkitEntity();
          if (myPet.getOwner().equals(targetPlayer)) {
            continue;
          }
 else           if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),targetPlayer)) {
            continue;
          }
        }
 else         if (entityLiving instanceof EntityTameableAnimal) {
          EntityTameableAnimal tameable=(EntityTameableAnimal)entityLiving;
          if (tameable.isTamed() && tameable.getOwner() != null) {
            Player tameableOwner=(Player)tameable.getOwner().getBukkitEntity();
            if (myPet.getOwner().equals(tameableOwner)) {
              continue;
            }
 else             if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),tameableOwner)) {
              continue;
            }
          }
        }
 else         if (entityLiving instanceof EntityMyPet) {
          MyPet targetMyPet=((EntityMyPet)entityLiving).getMyPet();
          if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),targetMyPet.getOwner().getPlayer())) {
            continue;
          }
        }
        if (behaviorSkill != null) {
          if (behaviorSkill.getBehavior() == BehaviorState.Raid) {
            if (entityLiving instanceof EntityTameableAnimal) {
              continue;
            }
 else             if (entityLiving instanceof EntityMyPet) {
              continue;
            }
 else             if (entityLiving instanceof EntityPlayer) {
              continue;
            }
          }
        }
        controlPathfinderGoal.stopControl();
        this.target=entityLiving;
        return true;
      }
    }
  }
  return false;
}

Fixed version (ground truth):
@Override public boolean shouldStart(){
  if (controlPathfinderGoal == null) {
    if (petEntity.petPathfinderSelector.hasGoal("String_Node_Str")) {
      controlPathfinderGoal=(Control)petEntity.petPathfinderSelector.getGoal("String_Node_Str");
    }
  }
  if (controlPathfinderGoal == null) {
    return false;
  }
  if (myPet.getDamage() <= 0 && myPet.getRangedDamage() <= 0) {
    return false;
  }
  if (controlPathfinderGoal.moveTo != null && petEntity.canMove()) {
    Behavior behaviorSkill=null;
    if (myPet.getSkills().isSkillActive(Behavior.class)) {
      behaviorSkill=myPet.getSkills().getSkill(Behavior.class);
      if (behaviorSkill.getBehavior() == Behavior.BehaviorState.Friendly) {
        return false;
      }
    }
    for (    Object entityObj : this.petEntity.world.a(EntityLiving.class,this.petEntity.boundingBox.grow((double)this.range,4.0D,(double)this.range))) {
      EntityLiving entityLiving=(EntityLiving)entityObj;
      if (entityLiving != petEntity) {
        if (entityLiving instanceof EntityPlayer) {
          Player targetPlayer=(Player)entityLiving.getBukkitEntity();
          if (myPet.getOwner().equals(targetPlayer)) {
            continue;
          }
 else           if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),targetPlayer)) {
            continue;
          }
        }
 else         if (entityLiving instanceof EntityTameableAnimal) {
          EntityTameableAnimal tameable=(EntityTameableAnimal)entityLiving;
          if (tameable.isTamed() && tameable.getOwner() != null) {
            Player tameableOwner=(Player)tameable.getOwner().getBukkitEntity();
            if (myPet.getOwner().equals(tameableOwner)) {
              continue;
            }
 else             if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),tameableOwner)) {
              continue;
            }
          }
        }
 else         if (entityLiving instanceof EntityMyPet) {
          MyPet targetMyPet=((EntityMyPet)entityLiving).getMyPet();
          if (!PvPChecker.canHurt(myPet.getOwner().getPlayer(),targetMyPet.getOwner().getPlayer())) {
            continue;
          }
        }
        if (!PvPChecker.canHurtCitizens(entityLiving.getBukkitEntity())) {
          continue;
        }
        if (behaviorSkill != null) {
          if (behaviorSkill.getBehavior() == BehaviorState.Raid) {
            if (entityLiving instanceof EntityTameableAnimal) {
              continue;
            }
 else             if (entityLiving instanceof EntityMyPet) {
              continue;
            }
 else             if (entityLiving instanceof EntityPlayer) {
              continue;
            }
          }
        }
        controlPathfinderGoal.stopControl();
        this.target=entityLiving;
        return true;
      }
    }
  }
  return false;
}