Program: 39918
Project: 39918
Buggy source:
@Override public void onReceive(Context context,Intent intent){
  Log.d(TAG,"String_Node_Str");
  String action=intent.getAction();
  if (!isConnected()) {
    Log.d(TAG,"String_Node_Str");
    if (mBluetoothHeadsetClient == null)     Log.d(TAG,"String_Node_Str");
    if (mBluetoothHeadsetClient.hfpClientInstance == null)     Log.d(TAG,"String_Node_Str");
    if (mDevice == null)     Log.d(TAG,"String_Node_Str");
    try {
      if (mBluetoothHeadsetClient.getConnectionState(mDevice) != BluetoothProfile.STATE_CONNECTED)       Log.d(TAG,"String_Node_Str");
    }
 catch (    NullPointerException npe) {
      Log.d(TAG,"String_Node_Str");
    }
    return;
  }
switch (action) {
case BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED:
    int state=intent.getIntExtra(BluetoothProfile.EXTRA_STATE,0);
switch (state) {
case BluetoothProfile.STATE_CONNECTED:
    updateAllCalls(mBluetoothHeadsetClient.getCurrentCalls(mDevice));
  connected=true;
break;
case BluetoothProfile.STATE_DISCONNECTED:
connected=false;
break;
}
break;
case BluetoothHeadsetClient.ACTION_AG_EVENT:
Bundle params=intent.getExtras();
forceUpdateAgEvents(params,false);
break;
case BluetoothHeadsetClient.ACTION_CALL_CHANGED:
updateAllCalls(mBluetoothHeadsetClient.getCurrentCalls(mDevice));
break;
case BluetoothHeadsetClient.ACTION_AUDIO_STATE_CHANGED:
Log.d(TAG,"String_Node_Str");
int astate=intent.getIntExtra(BluetoothProfile.EXTRA_STATE,0);
if (astate == BluetoothHeadsetClient.STATE_AUDIO_CONNECTED) {
Intent i=new Intent();
i.setAction("String_Node_Str");
sendBroadcast(i);
audioConnected=true;
}
 else if (astate != BluetoothHeadsetClient.STATE_AUDIO_CONNECTING) {
Intent i=new Intent();
i.setAction("String_Node_Str");
sendBroadcast(i);
audioConnected=false;
}
break;
default :
Log.d(TAG,"String_Node_Str" + action);
}
showNotification();
((NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE)).notify(17111,notification);
}

Fixed version (ground truth):
@Override public void onReceive(Context context,Intent intent){
  Log.d(TAG,"String_Node_Str" + intent.getAction());
  String action=intent.getAction();
  if (!isConnected()) {
    Log.d(TAG,"String_Node_Str");
    if (mBluetoothHeadsetClient == null)     Log.d(TAG,"String_Node_Str");
    if (mBluetoothHeadsetClient.hfpClientInstance == null)     Log.d(TAG,"String_Node_Str");
    if (mDevice == null)     Log.d(TAG,"String_Node_Str");
    try {
      if (mBluetoothHeadsetClient.getConnectionState(mDevice) != BluetoothProfile.STATE_CONNECTED)       Log.d(TAG,"String_Node_Str");
    }
 catch (    NullPointerException npe) {
      Log.d(TAG,"String_Node_Str");
    }
    return;
  }
switch (action) {
case BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED:
    int state=intent.getIntExtra(BluetoothProfile.EXTRA_STATE,0);
switch (state) {
case BluetoothProfile.STATE_CONNECTED:
    updateAllCalls(mBluetoothHeadsetClient.getCurrentCalls(mDevice));
  connected=true;
break;
case BluetoothProfile.STATE_DISCONNECTED:
connected=false;
break;
}
break;
case BluetoothHeadsetClient.ACTION_AG_EVENT:
Bundle params=intent.getExtras();
forceUpdateAgEvents(params,false);
break;
case BluetoothHeadsetClient.ACTION_CALL_CHANGED:
if (!updateAllCalls(mBluetoothHeadsetClient.getCurrentCalls(mDevice))) return;
break;
case BluetoothHeadsetClient.ACTION_AUDIO_STATE_CHANGED:
Log.d(TAG,"String_Node_Str");
int astate=intent.getIntExtra(BluetoothProfile.EXTRA_STATE,0);
if (astate == BluetoothHeadsetClient.STATE_AUDIO_CONNECTED) {
Intent i=new Intent();
i.setAction("String_Node_Str");
sendBroadcast(i);
audioConnected=true;
}
 else if (astate != BluetoothHeadsetClient.STATE_AUDIO_CONNECTING) {
Intent i=new Intent();
i.setAction("String_Node_Str");
sendBroadcast(i);
audioConnected=false;
}
break;
default :
Log.d(TAG,"String_Node_Str" + action);
}
showNotification();
((NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE)).notify(17111,notification);
}