Program: 80896
Project: 80896
Buggy source:
/** 
 * Called when the plugin is enabled
 */
public void onEnable(){
  INSTANCE=this;
  try {
    config=new ConfigManager(plugin);
  }
 catch (  InvalidConfigurationException ex) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().log(Level.WARNING,null,ex);
    plugin.getLogger().warning("String_Node_Str");
    return;
  }
  if (config.getMainConfig().automaticallySendBugReports) {
    BugReportingService bugReportingService=new BugReportingService(Level.SEVERE,getPlugin().getDescription().getName(),getPlugin().getDescription().getVersion(),command -> plugin.getProxy().getScheduler().runAsync(plugin,command));
    bugReportingService.registerLogger(getLogger());
  }
  try {
    Class.forName("String_Node_Str");
  }
 catch (  ClassNotFoundException ex) {
    is18=false;
  }
  try {
    Class.forName("String_Node_Str");
    isAbove995=true;
  }
 catch (  ClassNotFoundException ex) {
    isAbove995=false;
  }
  legacyPacketAccess=new LegacyPacketAccessImpl();
  if (!legacyPacketAccess.isTabModificationSupported()) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().warning("String_Node_Str");
    return;
  }
  if ((!legacyPacketAccess.isScoreboardSupported()) && config.getMainConfig().useScoreboardToBypass16CharLimit) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().warning("String_Node_Str");
    config.getMainConfig().useScoreboardToBypass16CharLimit=false;
  }
  if (isVersion18()) {
    packetAccess=new PacketAccessImpl(getLogger());
    if (!packetAccess.isTabHeaderFooterSupported()) {
      plugin.getLogger().warning("String_Node_Str");
    }
    skins=new SkinManager(plugin);
  }
  if (config.getMainConfig().pingDelay > 0) {
    for (    ServerInfo server : plugin.getProxy().getServers().values()) {
      PingTask task=new PingTask(server);
      serverState.put(server.getName(),task);
      plugin.getProxy().getScheduler().schedule(plugin,task,config.getMainConfig().pingDelay,config.getMainConfig().pingDelay,TimeUnit.SECONDS);
    }
  }
  fakePlayerManager=new FakePlayerManager(plugin);
  Collection<IPlayerProvider> playerProviders=new ArrayList<>();
  playerProviders.add(fakePlayerManager);
  if (plugin.getProxy().getPluginManager().getPlugin("String_Node_Str") != null) {
    playerProviders.add(new RedisPlayerProvider());
    plugin.getLogger().info("String_Node_Str");
  }
 else {
    playerProviders.add(bungeePlayerProvider);
  }
  players=new PlayerManager(this,playerProviders);
  tabLists=new TabListManager(this);
  if (!tabLists.loadTabLists()) {
    return;
  }
  plugin.getProxy().registerChannel(Constants.channel);
  bukkitBridge=new BukkitBridge(this);
  pm=new PermissionManager(this);
  variables=new VariablesManager();
  if (plugin.getProxy().getPluginManager().getPlugin("String_Node_Str") != null) {
    protocolVersionProvider=new ProtocolSupportVersionProvider();
  }
 else {
    protocolVersionProvider=new BungeeProtocolVersionProvider();
  }
  ProxyServer.getInstance().getPluginManager().registerListener(plugin,listener);
  ResendThread resendThread=new ResendThread(resendQueue,config.getMainConfig().tablistUpdateIntervall);
  plugin.getProxy().getScheduler().schedule(plugin,resendThread,1,TimeUnit.SECONDS);
  startRefreshThread();
  try {
    Thread.currentThread().getContextClassLoader().loadClass("String_Node_Str");
    ProxyServer.getInstance().getPluginManager().registerCommand(plugin,new SuperCommand(this));
    ProxyServer.getInstance().getScheduler().schedule(plugin,new UpdateNotifier(this),15,15,TimeUnit.MINUTES);
  }
 catch (  Exception ex) {
    ProxyServer.getInstance().getPluginManager().registerCommand(plugin,new OldSuperCommand(this));
  }
  try {
    Metrics metrics=new Metrics(plugin);
    metrics.start();
  }
 catch (  IOException e) {
    plugin.getLogger().log(Level.SEVERE,"String_Node_Str",e);
  }
  if (config.getMainConfig().checkForUpdates) {
    updateChecker=new UpdateChecker(plugin);
  }
  if (isVersion18()) {
    try {
      List<Integer> supportedProtocolVersions=Arrays.stream(ProtocolConstants.class.getDeclaredFields()).filter(f -> (f.getModifiers() & 8) != 0).filter(f -> f.getType() == int.class).map(f -> {
        try {
          f.setAccessible(true);
          return f.getInt(null);
        }
 catch (        IllegalAccessException e) {
          reportError(e);
          return 0;
        }
      }
).collect(Collectors.toList());
      int maxProtocolVersion=supportedProtocolVersions.stream().mapToInt(Integer::intValue).max().getAsInt();
      if (maxProtocolVersion > 47) {
        Class clazz=Protocol.DirectionData.class;
        Method registerPacket=clazz.getDeclaredMethod("String_Node_Str",int.class,int.class,Class.class);
        Method getId=clazz.getDeclaredMethod("String_Node_Str",Class.class,int.class);
        getId.setAccessible(true);
        registerPacket.setAccessible(true);
        registerPacket.invoke(Protocol.GAME.TO_CLIENT,62,getId.invoke(Protocol.GAME.TO_CLIENT,Team.class,maxProtocolVersion),TeamPacket.class);
      }
 else {
        Class clazz=Protocol.DirectionData.class;
        Method registerPacket=clazz.getDeclaredMethod("String_Node_Str",int.class,Class.class);
        registerPacket.setAccessible(true);
        registerPacket.invoke(Protocol.GAME.TO_CLIENT,62,TeamPacket.class);
      }
    }
 catch (    IllegalArgumentException|NoSuchMethodException|SecurityException|InvocationTargetException|IllegalAccessException ex) {
      getLogger().log(Level.SEVERE,"String_Node_Str",ex);
    }
  }
}

Fixed version (ground truth):
/** 
 * Called when the plugin is enabled
 */
public void onEnable(){
  INSTANCE=this;
  try {
    config=new ConfigManager(plugin);
  }
 catch (  InvalidConfigurationException ex) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().log(Level.WARNING,null,ex);
    plugin.getLogger().warning("String_Node_Str");
    return;
  }
  if (config.getMainConfig().automaticallySendBugReports) {
    BugReportingService bugReportingService=new BugReportingService(Level.SEVERE,getPlugin().getDescription().getName(),getPlugin().getDescription().getVersion(),command -> plugin.getProxy().getScheduler().runAsync(plugin,command));
    bugReportingService.registerLogger(getLogger());
  }
  try {
    Class.forName("String_Node_Str");
  }
 catch (  ClassNotFoundException ex) {
    is18=false;
  }
  try {
    Class.forName("String_Node_Str");
    isAbove995=true;
  }
 catch (  ClassNotFoundException ex) {
    isAbove995=false;
  }
  legacyPacketAccess=new LegacyPacketAccessImpl();
  if (!legacyPacketAccess.isTabModificationSupported()) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().warning("String_Node_Str");
    return;
  }
  if ((!legacyPacketAccess.isScoreboardSupported()) && config.getMainConfig().useScoreboardToBypass16CharLimit) {
    plugin.getLogger().warning("String_Node_Str");
    plugin.getLogger().warning("String_Node_Str");
    config.getMainConfig().useScoreboardToBypass16CharLimit=false;
  }
  if (isVersion18()) {
    packetAccess=new PacketAccessImpl(getLogger());
    if (!packetAccess.isTabHeaderFooterSupported()) {
      plugin.getLogger().warning("String_Node_Str");
    }
    skins=new SkinManager(plugin);
  }
  if (config.getMainConfig().pingDelay > 0) {
    for (    ServerInfo server : plugin.getProxy().getServers().values()) {
      PingTask task=new PingTask(server);
      serverState.put(server.getName(),task);
      plugin.getProxy().getScheduler().schedule(plugin,task,config.getMainConfig().pingDelay,config.getMainConfig().pingDelay,TimeUnit.SECONDS);
    }
  }
  fakePlayerManager=new FakePlayerManager(plugin);
  playerProviders=new ArrayList<>();
  playerProviders.add(fakePlayerManager);
  if (plugin.getProxy().getPluginManager().getPlugin("String_Node_Str") != null) {
    playerProviders.add(new RedisPlayerProvider());
    plugin.getLogger().info("String_Node_Str");
  }
 else {
    playerProviders.add(bungeePlayerProvider);
  }
  tabLists=new TabListManager(this);
  if (!tabLists.loadTabLists()) {
    return;
  }
  plugin.getProxy().registerChannel(Constants.channel);
  bukkitBridge=new BukkitBridge(this);
  pm=new PermissionManager(this);
  variables=new VariablesManager();
  if (plugin.getProxy().getPluginManager().getPlugin("String_Node_Str") != null) {
    protocolVersionProvider=new ProtocolSupportVersionProvider();
  }
 else {
    protocolVersionProvider=new BungeeProtocolVersionProvider();
  }
  ProxyServer.getInstance().getPluginManager().registerListener(plugin,listener);
  ResendThread resendThread=new ResendThread(resendQueue,config.getMainConfig().tablistUpdateIntervall);
  plugin.getProxy().getScheduler().schedule(plugin,resendThread,1,TimeUnit.SECONDS);
  startRefreshThread();
  try {
    Thread.currentThread().getContextClassLoader().loadClass("String_Node_Str");
    ProxyServer.getInstance().getPluginManager().registerCommand(plugin,new SuperCommand(this));
    ProxyServer.getInstance().getScheduler().schedule(plugin,new UpdateNotifier(this),15,15,TimeUnit.MINUTES);
  }
 catch (  Exception ex) {
    ProxyServer.getInstance().getPluginManager().registerCommand(plugin,new OldSuperCommand(this));
  }
  try {
    Metrics metrics=new Metrics(plugin);
    metrics.start();
  }
 catch (  IOException e) {
    plugin.getLogger().log(Level.SEVERE,"String_Node_Str",e);
  }
  if (config.getMainConfig().checkForUpdates) {
    updateChecker=new UpdateChecker(plugin);
  }
  if (isVersion18()) {
    try {
      List<Integer> supportedProtocolVersions=Arrays.stream(ProtocolConstants.class.getDeclaredFields()).filter(f -> (f.getModifiers() & 8) != 0).filter(f -> f.getType() == int.class).map(f -> {
        try {
          f.setAccessible(true);
          return f.getInt(null);
        }
 catch (        IllegalAccessException e) {
          reportError(e);
          return 0;
        }
      }
).collect(Collectors.toList());
      int maxProtocolVersion=supportedProtocolVersions.stream().mapToInt(Integer::intValue).max().getAsInt();
      if (maxProtocolVersion > 47) {
        Class clazz=Protocol.DirectionData.class;
        Method registerPacket=clazz.getDeclaredMethod("String_Node_Str",int.class,int.class,Class.class);
        Method getId=clazz.getDeclaredMethod("String_Node_Str",Class.class,int.class);
        getId.setAccessible(true);
        registerPacket.setAccessible(true);
        registerPacket.invoke(Protocol.GAME.TO_CLIENT,62,getId.invoke(Protocol.GAME.TO_CLIENT,Team.class,maxProtocolVersion),TeamPacket.class);
      }
 else {
        Class clazz=Protocol.DirectionData.class;
        Method registerPacket=clazz.getDeclaredMethod("String_Node_Str",int.class,Class.class);
        registerPacket.setAccessible(true);
        registerPacket.invoke(Protocol.GAME.TO_CLIENT,62,TeamPacket.class);
      }
    }
 catch (    IllegalArgumentException|NoSuchMethodException|SecurityException|InvocationTargetException|IllegalAccessException ex) {
      getLogger().log(Level.SEVERE,"String_Node_Str",ex);
    }
  }
}