Program: 70574
Project: 70574
Buggy source:
public void leaderboard_load_top_scores(final String leaderboard_id,final int time_span,final int max_results,final boolean force_reload){
  if (is_connected()) {
    AsyncTask<Void,Void,Void> task=new AsyncTask<Void,Void,Void>(){
      @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;
      }
    }
;
    task.execute();
    Log.i(TAG,"String_Node_Str");
  }
 else {
    String message="String_Node_Str";
    GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{message});
  }
}

Fixed version (ground truth):
public void leaderboard_load_top_scores(final String leaderboard_id,final int time_span,final int max_results,final boolean force_reload){
  if (is_connected()) {
    AsyncTask<Void,Void,Void> task=new AsyncTask<Void,Void,Void>(){
      @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;
      }
    }
;
    task.execute();
    Log.i(TAG,"String_Node_Str");
  }
 else {
    String message="String_Node_Str";
    GodotLib.calldeferred(instance_id,"String_Node_Str",new Object[]{message});
  }
}