Program: 133964
Project: 133964
Buggy source:
/** 
 * Scans a JavaPlugin and registers CoreAbility class files.
 * @param plugin a JavaPlugin containing CoreAbility class files
 * @param packagePrefix a prefix of the package name, used to increase performance
 * @see #getAbilities()
 * @see #getAbility(String)
 */
public static void registerPluginAbilities(JavaPlugin plugin,String packagePrefix){
  if (plugin == null) {
    return;
  }
  Class<?> pluginClass=plugin.getClass();
  ClassLoader loader=pluginClass.getClassLoader();
  ReflectionFactory rf=ReflectionFactory.getReflectionFactory();
  try {
    for (    final ClassInfo info : ClassPath.from(loader).getAllClasses()) {
      if (!info.getPackageName().startsWith(packagePrefix)) {
        continue;
      }
      Class<?> clazz=null;
      try {
        clazz=info.load();
        if (!CoreAbility.class.isAssignableFrom(clazz) || clazz.isInterface() || Modifier.isAbstract(clazz.getModifiers())) {
          continue;
        }
        Constructor<?> objDef=CoreAbility.class.getDeclaredConstructor();
        Constructor<?> intConstr=rf.newConstructorForSerialization(clazz,objDef);
        ;
        CoreAbility ability=(CoreAbility)clazz.cast(intConstr.newInstance());
        if (ability != null && ability.getName() != null && ability.isEnabled()) {
          ABILITIES_BY_NAME.put(ability.getName().toLowerCase(),ability);
        }
 else         if (!ability.isEnabled()) {
          plugin.getLogger().info(ability.getName() + "String_Node_Str");
        }
      }
 catch (      Exception e) {
      }
catch (      Error e) {
      }
    }
  }
 catch (  IOException e) {
    e.printStackTrace();
  }
}

Fixed version (ground truth):
/** 
 * Scans a JavaPlugin and registers CoreAbility class files.
 * @param plugin a JavaPlugin containing CoreAbility class files
 * @param packagePrefix a prefix of the package name, used to increase performance
 * @see #getAbilities()
 * @see #getAbility(String)
 */
public static void registerPluginAbilities(JavaPlugin plugin,String packagePrefix){
  if (plugin == null) {
    return;
  }
  Class<?> pluginClass=plugin.getClass();
  ClassLoader loader=pluginClass.getClassLoader();
  ReflectionFactory rf=ReflectionFactory.getReflectionFactory();
  try {
    for (    final ClassInfo info : ClassPath.from(loader).getAllClasses()) {
      if (!info.getPackageName().startsWith(packagePrefix)) {
        continue;
      }
      Class<?> clazz=null;
      try {
        clazz=info.load();
        if (!CoreAbility.class.isAssignableFrom(clazz) || clazz.isInterface() || Modifier.isAbstract(clazz.getModifiers())) {
          continue;
        }
        Constructor<?> objDef=CoreAbility.class.getDeclaredConstructor();
        Constructor<?> intConstr=rf.newConstructorForSerialization(clazz,objDef);
        ;
        CoreAbility ability=(CoreAbility)clazz.cast(intConstr.newInstance());
        if (ability == null || ability.getName() == null) {
          continue;
        }
 else         if (!ability.isEnabled()) {
          plugin.getLogger().info(ability.getName() + "String_Node_Str");
          continue;
        }
        String name=ability.getName();
        ABILITIES_BY_NAME.put(ability.getName().toLowerCase(),ability);
        if (ability instanceof ComboAbility) {
          ComboAbility combo=(ComboAbility)ability;
          if (combo.getCombination() != null) {
            ComboManager.getComboAbilities().put(name,new ComboManager.ComboAbilityInfo(name,combo.getCombination(),combo));
            ComboManager.getDescriptions().put(name,ability.getDescription());
            ComboManager.getInstructions().put(name,combo.getInstructions());
            String author="String_Node_Str";
            if (ability instanceof AddonAbility) {
              author=((AddonAbility)ability).getAuthor();
            }
            ComboManager.getAuthors().put(name,author);
          }
        }
        if (ability instanceof MultiAbility) {
          MultiAbility multiAbil=(MultiAbility)ability;
          MultiAbilityManager.multiAbilityList.add(new MultiAbilityInfo(name,multiAbil.getMultiAbilities()));
        }
        if (ability instanceof AddonAbility) {
          AddonAbility addon=(AddonAbility)ability;
          addon.load();
        }
      }
 catch (      Exception e) {
      }
catch (      Error e) {
      }
    }
  }
 catch (  IOException e) {
    e.printStackTrace();
  }
}