Program: 64827
Project: 64827
Buggy source:
public Settings parseSamplerSettings(OsuApiUser apiUser,@Nonnull String message,Language lang) throws UserException, SQLException, IOException {
  String[] remaining=message.split("String_Node_Str");
  Settings settings=new Settings();
  settings.model=Model.GAMMA;
  for (int i=0; i < remaining.length; i++) {
    String param=remaining[i];
    String lowerCase=param.toLowerCase();
    if (lowerCase.length() == 0)     continue;
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.nomod=true;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.model=Model.ALPHA;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 1) {
      settings.model=Model.BETA;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.model=Model.GAMMA;
      continue;
    }
    if (settings.model == Model.GAMMA && (lowerCase.equals("String_Node_Str") || lowerCase.equals("String_Node_Str"))) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.DoubleTime);
      continue;
    }
    if (settings.model == Model.GAMMA && lowerCase.equals("String_Node_Str")) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.HardRock);
      continue;
    }
    if (settings.model == Model.GAMMA && lowerCase.equals("String_Node_Str")) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.Hidden);
      continue;
    }
    if (settings.model == Model.GAMMA) {
      Long mods=Mods.fromShortNamesContinuous(lowerCase);
      if (mods != null) {
        mods=Mods.fixNC(mods);
        if (mods == (mods & Mods.getMask(Mods.DoubleTime,Mods.HardRock,Mods.Hidden))) {
          settings.requestedMods|=mods;
          continue;
        }
      }
    }
    if (backend.getDonator(apiUser) > 0) {
      RecommendationPredicate predicate=parser.tryParse(param,lang);
      if (predicate != null) {
        for (        RecommendationPredicate existingPredicate : settings.predicates) {
          if (existingPredicate.contradicts(predicate)) {
            throw new UserException(lang.invalidChoice(existingPredicate.getOriginalArgument() + "String_Node_Str" + predicate.getOriginalArgument(),"String_Node_Str" + existingPredicate.getOriginalArgument() + "String_Node_Str"+ predicate.getOriginalArgument()));
          }
        }
        settings.predicates.add(predicate);
        continue;
      }
    }
    throw new UserException(lang.invalidChoice(param,"String_Node_Str"));
  }
  if (settings.nomod && settings.requestedMods != 0) {
    throw new UserException(lang.mixedNomodAndMods());
  }
  return settings;
}

Fixed version (ground truth):
public Settings parseSamplerSettings(OsuApiUser apiUser,@Nonnull String message,Language lang) throws UserException, SQLException, IOException {
  String[] remaining=message.split("String_Node_Str");
  Settings settings=new Settings();
  settings.model=Model.GAMMA;
  for (int i=0; i < remaining.length; i++) {
    String param=remaining[i];
    String lowerCase=param.toLowerCase();
    if (lowerCase.length() == 0)     continue;
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.nomod=true;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.model=Model.ALPHA;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 1) {
      settings.model=Model.BETA;
      continue;
    }
    if (getLevenshteinDistance(lowerCase,"String_Node_Str") <= 2) {
      settings.model=Model.GAMMA;
      continue;
    }
    if (settings.model == Model.GAMMA && (lowerCase.equals("String_Node_Str") || lowerCase.equals("String_Node_Str"))) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.DoubleTime);
      continue;
    }
    if (settings.model == Model.GAMMA && lowerCase.equals("String_Node_Str")) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.HardRock);
      continue;
    }
    if (settings.model == Model.GAMMA && lowerCase.equals("String_Node_Str")) {
      settings.requestedMods=Mods.add(settings.requestedMods,Mods.Hidden);
      continue;
    }
    if (settings.model == Model.GAMMA) {
      Long mods=Mods.fromShortNamesContinuous(lowerCase);
      if (mods != null) {
        mods=Mods.fixNC(mods);
        if (mods == (mods & Mods.getMask(Mods.DoubleTime,Mods.HardRock,Mods.Hidden))) {
          for (          Mods mod : Mods.getMods(mods)) {
            settings.requestedMods=Mods.add(settings.requestedMods,mod);
          }
          continue;
        }
      }
    }
    if (backend.getDonator(apiUser) > 0) {
      RecommendationPredicate predicate=parser.tryParse(param,lang);
      if (predicate != null) {
        for (        RecommendationPredicate existingPredicate : settings.predicates) {
          if (existingPredicate.contradicts(predicate)) {
            throw new UserException(lang.invalidChoice(existingPredicate.getOriginalArgument() + "String_Node_Str" + predicate.getOriginalArgument(),"String_Node_Str" + existingPredicate.getOriginalArgument() + "String_Node_Str"+ predicate.getOriginalArgument()));
          }
        }
        settings.predicates.add(predicate);
        continue;
      }
    }
    throw new UserException(lang.invalidChoice(param,"String_Node_Str"));
  }
  if (settings.nomod && settings.requestedMods != 0) {
    throw new UserException(lang.mixedNomodAndMods());
  }
  return settings;
}