Program: 48653
Project: 48653
Buggy source:
/** 
 * @param vcVm
 * @param portGroup
 * @param nicEntity update nicEntity if it is not null
 * @return IPv4 address this nic
 * @throws Exception
 */
private static String inspectNicInfoWithoutSession(final VcVirtualMachine vcVm,final String portGroup,final NicEntity nicEntity) throws Exception {
  GuestInfo guestInfo=vcVm.queryGuest();
  NicInfo[] nicInfos=guestInfo.getNet();
  String ipaddress=Constants.NULL_IPV4_ADDRESS;
  if (nicInfos == null || nicInfos.length == 0) {
    return ipaddress;
  }
  for (  NicInfo nicInfo : nicInfos) {
    if (nicInfo.getNetwork() == null || !nicInfo.getNetwork().equals(portGroup)) {
      continue;
    }
    if (nicInfo.getIpConfig() == null || nicInfo.getIpConfig().getIpAddress() == null || nicInfo.getIpConfig().getIpAddress().length == 0) {
      continue;
    }
    if (nicEntity != null) {
      nicEntity.setMacAddress(nicInfo.getMacAddress());
      nicEntity.setConnected(nicInfo.isConnected());
    }
    for (    IpAddress info : nicInfo.getIpConfig().getIpAddress()) {
      if (info.getIpAddress() != null && sun.net.util.IPAddressUtil.isIPv4LiteralAddress(info.getIpAddress())) {
        ipaddress=info.getIpAddress();
        if (nicEntity != null) {
          nicEntity.setIpv4Address(ipaddress);
        }
      }
      if (info.getIpAddress() != null && sun.net.util.IPAddressUtil.isIPv6LiteralAddress(info.getIpAddress())) {
        if (nicEntity != null) {
          nicEntity.setIpv6Address(info.getIpAddress());
        }
      }
    }
  }
  return ipaddress;
}

Fixed version (ground truth):
/** 
 * @param vcVm
 * @param portGroup
 * @param nicEntity update nicEntity if it is not null
 * @return IPv4 address this nic
 * @throws Exception
 */
private static String inspectNicInfoWithoutSession(final VcVirtualMachine vcVm,final String portGroup,final NicEntity nicEntity) throws Exception {
  GuestInfo guestInfo=vcVm.queryGuest();
  NicInfo[] nicInfos=guestInfo.getNet();
  String ipaddress=Constants.NULL_IPV4_ADDRESS;
  if (nicInfos == null || nicInfos.length == 0) {
    return ipaddress;
  }
  for (  NicInfo nicInfo : nicInfos) {
    if (nicInfo.getNetwork() == null || !nicInfo.getNetwork().equals(portGroup)) {
      continue;
    }
    if (nicEntity != null) {
      nicEntity.setMacAddress(nicInfo.getMacAddress());
      nicEntity.setConnected(nicInfo.isConnected());
    }
    if (nicInfo.getIpConfig() == null) {
      if (nicInfo.getIpAddress() == null || nicInfo.getIpAddress().length == 0) {
        continue;
      }
      for (      String addr : nicInfo.getIpAddress()) {
        if (sun.net.util.IPAddressUtil.isIPv4LiteralAddress(addr)) {
          nicEntity.setIpv4Address(addr);
        }
 else         if (sun.net.util.IPAddressUtil.isIPv6LiteralAddress(addr)) {
          nicEntity.setIpv6Address(addr);
        }
      }
      continue;
    }
    if (nicInfo.getIpConfig().getIpAddress() == null || nicInfo.getIpConfig().getIpAddress().length == 0) {
      continue;
    }
    for (    IpAddress info : nicInfo.getIpConfig().getIpAddress()) {
      if (info.getIpAddress() != null && sun.net.util.IPAddressUtil.isIPv4LiteralAddress(info.getIpAddress())) {
        ipaddress=info.getIpAddress();
        if (nicEntity != null) {
          nicEntity.setIpv4Address(ipaddress);
        }
      }
      if (info.getIpAddress() != null && sun.net.util.IPAddressUtil.isIPv6LiteralAddress(info.getIpAddress())) {
        if (nicEntity != null) {
          nicEntity.setIpv6Address(info.getIpAddress());
        }
      }
    }
  }
  return ipaddress;
}