Program: 65524
Project: 65524
Buggy source:
protected AbstractTripleEncapsulatedExpressionHelper<LocateExpression> buildLocateExpressionHelper(){
  return new AbstractTripleEncapsulatedExpressionHelper<LocateExpression>(){
    @Override public String firstCommaMissingKey(){
      return LocateExpression_MissingFirstComma;
    }
    @Override public String firstExpressionInvalidKey(){
      return LocateExpression_InvalidFirstExpression;
    }
    @Override public String firstExpressionMissingKey(){
      return LocateExpression_MissingFirstExpression;
    }
    public String identifier(    LocateExpression expression){
      return LOCATE;
    }
    @Override public boolean isFirstExpressionValid(    LocateExpression expression){
      return isValid(expression.getFirstExpression(),StringPrimaryBNF.ID);
    }
    @Override public boolean isSecondExpressionValid(    LocateExpression expression){
      return isValid(expression.getSecondExpression(),StringPrimaryBNF.ID);
    }
    @Override public boolean isThirdExpressionValid(    LocateExpression expression){
      return isValid(expression.getThirdExpression(),StringPrimaryBNF.ID);
    }
    public String leftParenthesisMissingKey(){
      return LocateExpression_MissingLeftParenthesis;
    }
    public String rightParenthesisMissingKey(){
      return LocateExpression_MissingRightParenthesis;
    }
    @Override public String secondCommaMissingKey(){
      return LocateExpression_MissingSecondComma;
    }
    @Override public String secondExpressionInvalidKey(){
      return LocateExpression_InvalidSecondExpression;
    }
    @Override public String secondExpressionMissingKey(){
      return LocateExpression_MissingSecondExpression;
    }
    @Override public String thirdExpressionInvalidKey(){
      return LocateExpression_InvalidThirdExpression;
    }
    @Override public String thirdExpressionMissingKey(){
      return LocateExpression_MissingThirdExpression;
    }
  }
;
}

Fixed version (ground truth):
protected AbstractTripleEncapsulatedExpressionHelper<LocateExpression> buildLocateExpressionHelper(){
  return new AbstractTripleEncapsulatedExpressionHelper<LocateExpression>(){
    @Override public String firstCommaMissingKey(){
      return LocateExpression_MissingFirstComma;
    }
    @Override public String firstExpressionInvalidKey(){
      return LocateExpression_InvalidFirstExpression;
    }
    @Override public String firstExpressionMissingKey(){
      return LocateExpression_MissingFirstExpression;
    }
    public String identifier(    LocateExpression expression){
      return LOCATE;
    }
    @Override public boolean isFirstExpressionValid(    LocateExpression expression){
      return isValid(expression.getFirstExpression(),StringPrimaryBNF.ID);
    }
    @Override public boolean isSecondExpressionValid(    LocateExpression expression){
      return isValid(expression.getSecondExpression(),StringPrimaryBNF.ID);
    }
    @Override public boolean isThirdExpressionValid(    LocateExpression expression){
      return isValid(expression.getThirdExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    public String leftParenthesisMissingKey(){
      return LocateExpression_MissingLeftParenthesis;
    }
    public String rightParenthesisMissingKey(){
      return LocateExpression_MissingRightParenthesis;
    }
    @Override public String secondCommaMissingKey(){
      return LocateExpression_MissingSecondComma;
    }
    @Override public String secondExpressionInvalidKey(){
      return LocateExpression_InvalidSecondExpression;
    }
    @Override public String secondExpressionMissingKey(){
      return LocateExpression_MissingSecondExpression;
    }
    @Override public String thirdExpressionInvalidKey(){
      return LocateExpression_InvalidThirdExpression;
    }
    @Override public String thirdExpressionMissingKey(){
      return LocateExpression_MissingThirdExpression;
    }
  }
;
}