Program: 70578
Project: 70578
Buggy source:
@Override protected Void doInBackground(Void... params){
  LeaderboardsClient leaderboardsClient=get_leaderboard_client();
  leaderboardsClient.loadTopScores(leaderboard_id,time_span,LeaderboardVariant.COLLECTION_PUBLIC,max_results,force_reload).addOnFailureListener(new OnFailureListener(){
    @Override public void onFailure(    @NonNull Exception e){
      String message=e.getMessage();
      Log.e(TAG,"String_Node_Str" + message);
      GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{message});
    }
  }
).addOnCompleteListener(new OnCompleteListener<AnnotatedData<LeaderboardScores>>(){
    @Override public void onComplete(    @NonNull Task<AnnotatedData<LeaderboardScores>> task){
      if (task.isSuccessful()) {
        JSONObject leaderboard_result=new JSONObject();
        AnnotatedData<LeaderboardScores> result=task.getResult();
        LeaderboardScoreBuffer leaderboardScores=result.get().getScores();
        GooglePlayer googlePlayer=GooglePlayer.getInstance(activity);
        try {
          for (Iterator<LeaderboardScore> iterator=leaderboardScores.iterator(); iterator.hasNext(); ) {
            LeaderboardScore leaderboardScore=iterator.next();
            String displayName=leaderboardScore.getScoreHolderDisplayName();
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str",leaderboardScore.getRawScore());
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str",displayName);
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str","String_Node_Str" + displayName);
            googlePlayer.copy_user_picture(leaderboardScore.getScoreHolderIconImageUri(),displayName);
          }
        }
 catch (        JSONException e) {
          Log.w(TAG,"String_Node_Str" + e);
        }
        GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{leaderboard_result});
      }
 else {
        Log.e(TAG,"String_Node_Str" + task.getException());
        GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{task.getException().getMessage()});
      }
    }
  }
);
  return null;
}

Fixed version (ground truth):
@Override protected Void doInBackground(Void... params){
  LeaderboardsClient leaderboardsClient=get_leaderboard_client();
  leaderboardsClient.loadTopScores(leaderboard_id,time_span,LeaderboardVariant.COLLECTION_PUBLIC,max_results,force_reload).addOnFailureListener(new OnFailureListener(){
    @Override public void onFailure(    @NonNull Exception e){
      String message=e.getMessage();
      Log.e(TAG,"String_Node_Str" + message);
      GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{message});
    }
  }
).addOnCompleteListener(new OnCompleteListener<AnnotatedData<LeaderboardScores>>(){
    @Override public void onComplete(    @NonNull Task<AnnotatedData<LeaderboardScores>> task){
      if (task.isSuccessful()) {
        JSONObject leaderboard_result=new JSONObject();
        AnnotatedData<LeaderboardScores> result=task.getResult();
        LeaderboardScoreBuffer leaderboardScores=result.get().getScores();
        GooglePlayer googlePlayer=GooglePlayer.getInstance(activity);
        try {
          for (Iterator<LeaderboardScore> iterator=leaderboardScores.iterator(); iterator.hasNext(); ) {
            LeaderboardScore leaderboardScore=iterator.next();
            String displayName=leaderboardScore.getScoreHolderDisplayName();
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str",leaderboardScore.getRawScore());
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str",displayName);
            leaderboard_result.put(String.valueOf(leaderboardScore.getRank()) + "String_Node_Str","String_Node_Str" + displayName);
            googlePlayer.copy_user_picture(leaderboardScore.getScoreHolderIconImageUri(),displayName);
          }
        }
 catch (        JSONException e) {
          Log.w(TAG,"String_Node_Str" + e);
        }
        GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{leaderboard_result.toString()});
      }
 else {
        Log.e(TAG,"String_Node_Str" + task.getException());
        GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{task.getException().getMessage()});
      }
    }
  }
);
  return null;
}