Program: 22161
Project: 22161
Buggy source:
/** 
 * @see AudioManager#requestAudioFocus(IAudioFocusDispatcher,int,int) 
 */
public int requestAudioFocus(int mainStreamType,int focusChangeHint,IBinder cb,IAudioFocusDispatcher fd,String clientId){
  Log.i(TAG,"String_Node_Str" + clientId);
  if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId) && ((cb == null) || !cb.pingBinder())) {
    Log.i(TAG,"String_Node_Str");
    return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
  }
  if (!canReassignAudioFocus()) {
    return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
  }
synchronized (mFocusStack) {
    if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
      if (mFocusStack.peek().mFocusChangeType == focusChangeHint) {
        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
      }
      mFocusStack.pop();
    }
    if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
      try {
        mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(-1 * focusChangeHint,mFocusStack.peek().mClientId);
      }
 catch (      RemoteException e) {
        Log.e(TAG,"String_Node_Str" + e);
        e.printStackTrace();
      }
    }
    removeFocusStackEntry(clientId,false);
    mFocusStack.push(new FocusStackEntry(mainStreamType,focusChangeHint,false,fd,cb,clientId));
  }
  if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId)) {
    AudioFocusDeathHandler afdh=new AudioFocusDeathHandler(cb);
    try {
      cb.linkToDeath(afdh,0);
    }
 catch (    RemoteException e) {
      Log.w(TAG,"String_Node_Str" + cb + "String_Node_Str");
    }
  }
  return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
}

Fixed version (ground truth):
/** 
 * @see AudioManager#requestAudioFocus(IAudioFocusDispatcher,int,int) 
 */
public int requestAudioFocus(int mainStreamType,int focusChangeHint,IBinder cb,IAudioFocusDispatcher fd,String clientId){
  Log.i(TAG,"String_Node_Str" + clientId);
  if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId) && ((cb == null) || !cb.pingBinder())) {
    Log.i(TAG,"String_Node_Str");
    return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
  }
synchronized (mAudioFocusLock) {
    if (!canReassignAudioFocus()) {
      return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
    }
    if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
      if (mFocusStack.peek().mFocusChangeType == focusChangeHint) {
        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
      }
      mFocusStack.pop();
    }
    if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
      try {
        mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(-1 * focusChangeHint,mFocusStack.peek().mClientId);
      }
 catch (      RemoteException e) {
        Log.e(TAG,"String_Node_Str" + e);
        e.printStackTrace();
      }
    }
    removeFocusStackEntry(clientId,false);
    mFocusStack.push(new FocusStackEntry(mainStreamType,focusChangeHint,false,fd,cb,clientId));
  }
  if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId)) {
    AudioFocusDeathHandler afdh=new AudioFocusDeathHandler(cb);
    try {
      cb.linkToDeath(afdh,0);
    }
 catch (    RemoteException e) {
      Log.w(TAG,"String_Node_Str" + cb + "String_Node_Str");
    }
  }
  return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
}