Program: 87008
Project: 87008
Buggy source:
@Override protected Environment doInBackground(Context... params){
  if (params.length == 0 || params[0] == null) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  Context context=params[0];
  String logText="String_Node_Str";
  if (GeoFenceIntentService.getCurrentGeofences() != null && !GeoFenceIntentService.getCurrentGeofences().isEmpty()) {
    for (    LocationEnvironmentVariable variable : GeoFenceIntentService.getCurrentGeofences()) {
      logText+=variable.getLocationName() + "String_Node_Str";
    }
  }
 else {
    logText+="String_Node_Str";
  }
  logText+="String_Node_Str";
  if (BluetoothReceiver.getCurrentlyConnectedBluetoothDevices() != null && !BluetoothReceiver.getCurrentlyConnectedBluetoothDevices().isEmpty()) {
    for (    BluetoothEnvironmentVariable variable : BluetoothReceiver.getCurrentlyConnectedBluetoothDevices()) {
      logText+=variable.getDeviceName() + "String_Node_Str";
    }
  }
 else {
    logText+="String_Node_Str";
  }
  logText+="String_Node_Str";
  if (WifiReceiver.getCurrentWifiNetwork() != null) {
    logText+=WifiReceiver.getCurrentWifiNetwork().getSSID();
  }
 else {
    logText+="String_Node_Str";
  }
  Log.d(LOG_TAG,logText);
  List<Environment> currentEnvironments=new ArrayList<Environment>();
  manageEnvironmentDetectionCriticalSection.acquireUninterruptibly();
  for (  LocationEnvironmentVariable location : GeoFenceIntentService.getCurrentGeofences()) {
    List<Environment> potentialEnvironments=Environment.getAllEnvironmentBarebonesForLocation(context,location);
    currentEnvironments.addAll(checkWifiAndBluetoothOfPotentialEnvironments(context,potentialEnvironments));
  }
  List<Environment> potentialEnvironments=Environment.getAllnvironmentBarebonesWithoutLocation(context);
  currentEnvironments.addAll(checkWifiAndBluetoothOfPotentialEnvironments(context,potentialEnvironments));
  manageEnvironmentDetectionCriticalSection.release();
  if (currentEnvironments.size() > 1) {
    Log.w(LOG_TAG,"String_Node_Str" + currentEnvironments.toString());
  }
  if (currentEnvironments.size() == 0) {
    Log.v(LOG_TAG,"String_Node_Str");
    return null;
  }
  return currentEnvironments.get(0);
}

Fixed version (ground truth):
/** 
 * The function which is run in background. Checks for the stored environment which matches the current variable values
 * @param params Activity/service context
 * @return The detected environment
 */
@Override protected Environment doInBackground(Context... params){
  if (params.length == 0 || params[0] == null) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  Context context=params[0];
  String logText="String_Node_Str";
  if (GeoFenceIntentService.getCurrentGeofences() != null && !GeoFenceIntentService.getCurrentGeofences().isEmpty()) {
    for (    LocationEnvironmentVariable variable : GeoFenceIntentService.getCurrentGeofences()) {
      logText+=variable.getLocationName() + "String_Node_Str";
    }
  }
 else {
    logText+="String_Node_Str";
  }
  logText+="String_Node_Str";
  if (BluetoothReceiver.getCurrentlyConnectedBluetoothDevices() != null && !BluetoothReceiver.getCurrentlyConnectedBluetoothDevices().isEmpty()) {
    for (    BluetoothEnvironmentVariable variable : BluetoothReceiver.getCurrentlyConnectedBluetoothDevices()) {
      logText+=variable.getDeviceName() + "String_Node_Str";
    }
  }
 else {
    logText+="String_Node_Str";
  }
  logText+="String_Node_Str";
  if (WifiReceiver.getCurrentWifiNetwork() != null) {
    logText+=WifiReceiver.getCurrentWifiNetwork().getSSID();
  }
 else {
    logText+="String_Node_Str";
  }
  Log.d(LOG_TAG,logText);
  List<Environment> currentEnvironments=new ArrayList<Environment>();
  manageEnvironmentDetectionCriticalSection.acquireUninterruptibly();
  for (  LocationEnvironmentVariable location : GeoFenceIntentService.getCurrentGeofences()) {
    List<Environment> potentialEnvironments=Environment.getAllEnvironmentBarebonesForLocation(context,location);
    if (potentialEnvironments != null && !potentialEnvironments.isEmpty()) {
      currentEnvironments.addAll(checkWifiAndBluetoothOfPotentialEnvironments(context,potentialEnvironments));
    }
  }
  List<Environment> potentialEnvironments=Environment.getAllnvironmentBarebonesWithoutLocation(context);
  if (potentialEnvironments != null && !potentialEnvironments.isEmpty()) {
    currentEnvironments.addAll(checkWifiAndBluetoothOfPotentialEnvironments(context,potentialEnvironments));
  }
  manageEnvironmentDetectionCriticalSection.release();
  if (currentEnvironments.size() > 1) {
    Log.w(LOG_TAG,"String_Node_Str" + currentEnvironments.toString());
  }
  if (currentEnvironments.size() == 0) {
    Log.v(LOG_TAG,"String_Node_Str");
    return null;
  }
  return currentEnvironments.get(0);
}