Program: 153719
Project: 153719
Buggy source:
@Override public void run(){
  StringBuilder errorbuffer=new StringBuilder();
  Pcap cap=Pcap.openLive(m_dev.getName(),1024 * 64,Pcap.MODE_PROMISCUOUS,1000 * 30,errorbuffer);
  assert(cap != null);
  PcapPacketHandler<String> jpacketHandler=new PcapPacketHandler<String>(){
    public void nextPacket(    PcapPacket packet,    String user){
      int i=0;
      while (true) {
        Ip4 ip=new Ip4();
        long t=packet.getCaptureHeader().timestampInMillis();
        Tcp tcp=new Tcp();
        Udp udp=new Udp();
        int s=0;
        int d=0;
        int sp=0;
        int tp=0;
        int okcount=0;
        int flag=0;
        Date arriveTime=new Date(t);
        if (packet.hasHeader(ip,i)) {
          s=ip.sourceToInt();
          d=ip.destinationToInt();
          ++okcount;
        }
        if (packet.hasHeader(tcp,i)) {
          sp=tcp.source();
          tp=tcp.destination();
          flag|=IPacket.PacketFlag_TCP;
          ++okcount;
        }
 else         if (packet.hasHeader(udp,i)) {
          sp=udp.source();
          tp=udp.destination();
          flag|=IPacket.PacketFlag_UDP;
          ++okcount;
        }
        if (packet.hasHeader(Http.ID,i)) {
          flag|=IPacket.PacketFlag_HTTP;
        }
        if (packet.hasHeader(Ethernet.ID,i)) {
          flag|=IPacket.PacketFlag_Ethernet;
        }
        if (okcount != 2) {
          break;
        }
 else {
          Packet p=new Packet();
          p.DIP=s;
          p.SIP=d;
          p.DPort=sp;
          p.SPort=tp;
          p.PackLen=packet.getCaptureHeader().caplen();
          p.RecvTime=arriveTime;
          if (s == GetDeviceIpInt(m_dev) || d == GetDeviceIpInt(m_dev)) {
            p.IsUpdate=(GetDeviceIpInt(m_dev) != s);
            p.PacketFlag=flag;
synchronized (ListenThread.this) {
              List<IPacketListener> listeners=m_network.getPacketListeners();
              ListIterator<IPacketListener> it=listeners.listIterator();
              while (it.hasNext()) {
                it.next().onPacketRecv(p);
              }
            }
          }
        }
        ++i;
      }
    }
  }
;
  while (true) {
    cap.loop(Pcap.LOOP_INFINITE,jpacketHandler,m_dev.getDescription());
  }
}

Fixed version (ground truth):
@Override public void run(){
  StringBuilder errorbuffer=new StringBuilder();
  Pcap cap=Pcap.openLive(m_dev.getName(),1024 * 64,Pcap.MODE_PROMISCUOUS,1000 * 30,errorbuffer);
  assert(cap != null);
  PcapPacketHandler<String> jpacketHandler=new PcapPacketHandler<String>(){
    public void nextPacket(    PcapPacket packet,    String user){
      int i=0;
      while (true) {
        Ip4 ip=new Ip4();
        long t=packet.getCaptureHeader().timestampInMillis();
        Tcp tcp=new Tcp();
        Udp udp=new Udp();
        int s=0;
        int d=0;
        int sp=0;
        int tp=0;
        int okcount=0;
        int flag=0;
        Date arriveTime=new Date(t);
        if (packet.hasHeader(ip,i)) {
          s=ip.sourceToInt();
          d=ip.destinationToInt();
          ++okcount;
        }
        if (packet.hasHeader(tcp,i)) {
          sp=tcp.source();
          tp=tcp.destination();
          flag|=IPacket.PacketFlag_TCP;
          ++okcount;
        }
 else         if (packet.hasHeader(udp,i)) {
          sp=udp.source();
          tp=udp.destination();
          flag|=IPacket.PacketFlag_UDP;
          ++okcount;
        }
        if (packet.hasHeader(Http.ID,i)) {
          flag|=IPacket.PacketFlag_HTTP;
        }
        if (packet.hasHeader(Ethernet.ID,i)) {
          flag|=IPacket.PacketFlag_Ethernet;
        }
        if (okcount != 2) {
          break;
        }
 else {
          Packet p=new Packet();
          p.DIP=d;
          p.SIP=s;
          p.DPort=sp;
          p.SPort=tp;
          p.PackLen=packet.getCaptureHeader().caplen();
          p.RecvTime=arriveTime;
          if (s == GetDeviceIpInt(m_dev) || d == GetDeviceIpInt(m_dev)) {
            p.IsUpdate=(GetDeviceIpInt(m_dev) == s);
            p.PacketFlag=flag;
synchronized (ListenThread.this) {
              List<IPacketListener> listeners=m_network.getPacketListeners();
              ListIterator<IPacketListener> it=listeners.listIterator();
              while (it.hasNext()) {
                it.next().onPacketRecv(p);
              }
            }
          }
        }
        ++i;
      }
    }
  }
;
  while (true) {
    cap.loop(Pcap.LOOP_INFINITE,jpacketHandler,m_dev.getDescription());
  }
}