Program: 3957
Project: 3957
Buggy source:
public void connectionCreated(final org.jivesoftware.smack.XMPPConnection connection){
  if (XMPPConnectionImpl.this.connection != connection) {
    return;
  }
  if (LOG.isDebugEnabled()) {
    LOG.debug("String_Node_Str" + connection.toString());
  }
  connection.addConnectionListener(new SmackConnectionListener());
synchronized (ProviderManager.getInstance()) {
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",new AddressIQProvider(addressFactory));
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",FileTransferIQ.getIQProvider());
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",new AuthTokenIQProvider());
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",LibraryChangedIQ.getIQProvider());
    }
  }
  ChatStateManager.getInstance(connection);
  ServiceDiscoveryManager.getInstanceFor(connection).addFeature(XMPPServiceImpl.LW_SERVICE_NS);
synchronized (XMPPConnectionImpl.this) {
    Address address=null;
    if (lastEvent != null) {
      address=lastEvent.getSource();
    }
    addressIQListener=new AddressIQListener(XMPPConnectionImpl.this,addressFactory,address,featureSupport);
  }
  connection.addPacketListener(addressIQListener,addressIQListener.getPacketFilter());
  fileTransferIQListener=new FileTransferIQListener(fileOfferBroadcaster);
  connection.addPacketListener(fileTransferIQListener,fileTransferIQListener.getPacketFilter());
  authTokenIQListener=new AuthTokenIQListener(XMPPConnectionImpl.this,authenticator,featureSupport);
  connection.addPacketListener(authTokenIQListener,authTokenIQListener.getPacketFilter());
  libChangedIQListener=new LibraryChangedIQListener(libraryChangedEventEventBroadcaster,XMPPConnectionImpl.this);
  connection.addPacketListener(libChangedIQListener,libChangedIQListener.getPacketFilter());
}

Fixed version (ground truth):
@Override public void connectionCreated(XMPPConnection connection){
  if (XMPPConnectionImpl.this.connection != connection) {
    return;
  }
  if (LOG.isDebugEnabled()) {
    LOG.debug("String_Node_Str" + connection.toString());
  }
  connection.addConnectionListener(this);
synchronized (ProviderManager.getInstance()) {
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",new AddressIQProvider(addressFactory));
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",FileTransferIQ.getIQProvider());
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",new AuthTokenIQProvider());
    }
    if (ProviderManager.getInstance().getIQProvider("String_Node_Str","String_Node_Str") == null) {
      ProviderManager.getInstance().addIQProvider("String_Node_Str","String_Node_Str",LibraryChangedIQ.getIQProvider());
    }
  }
  ChatStateManager.getInstance(connection);
  ServiceDiscoveryManager.getInstanceFor(connection).addFeature(XMPPServiceImpl.LW_SERVICE_NS);
synchronized (XMPPConnectionImpl.this) {
    Address address=null;
    if (lastEvent != null) {
      address=lastEvent.getSource();
    }
    addressIQListener=new AddressIQListener(XMPPConnectionImpl.this,addressFactory,address,featureSupport);
  }
  connection.addPacketListener(addressIQListener,addressIQListener.getPacketFilter());
  fileTransferIQListener=new FileTransferIQListener(fileOfferBroadcaster);
  connection.addPacketListener(fileTransferIQListener,fileTransferIQListener.getPacketFilter());
  authTokenIQListener=new AuthTokenIQListener(XMPPConnectionImpl.this,authenticator,featureSupport);
  connection.addPacketListener(authTokenIQListener,authTokenIQListener.getPacketFilter());
  libChangedIQListener=new LibraryChangedIQListener(libraryChangedEventEventBroadcaster,XMPPConnectionImpl.this);
  connection.addPacketListener(libChangedIQListener,libChangedIQListener.getPacketFilter());
}