Program: 65523
Project: 65523
Buggy source:
protected AbstractTripleEncapsulatedExpressionHelper<SubstringExpression> buildSubstringExpressionHelper(){
  return new AbstractTripleEncapsulatedExpressionHelper<SubstringExpression>(){
    @Override public String firstCommaMissingKey(){
      return SubstringExpression_MissingFirstComma;
    }
    @Override public String firstExpressionInvalidKey(){
      return SubstringExpression_InvalidFirstExpression;
    }
    @Override public String firstExpressionMissingKey(){
      return SubstringExpression_MissingFirstExpression;
    }
    @Override public boolean hasThirdExpression(    SubstringExpression expression){
      boolean hasThirdExpression=super.hasThirdExpression(expression);
      if (!hasThirdExpression && getJPAVersion().isNewerThanOrEqual(JPAVersion.VERSION_2_0)) {
        hasThirdExpression=true;
      }
      return hasThirdExpression;
    }
    public String identifier(    SubstringExpression expression){
      return SUBSTRING;
    }
    @Override public boolean isFirstExpressionValid(    SubstringExpression expression){
      return isValid(expression.getFirstExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    @Override public boolean isSecondExpressionValid(    SubstringExpression expression){
      return isValid(expression.getSecondExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    @Override public boolean isThirdExpressionValid(    SubstringExpression expression){
      return isValid(expression.getThirdExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    public String leftParenthesisMissingKey(){
      return SubstringExpression_MissingLeftParenthesis;
    }
    public String rightParenthesisMissingKey(){
      return SubstringExpression_MissingRightParenthesis;
    }
    @Override public String secondCommaMissingKey(){
      return SubstringExpression_MissingSecondComma;
    }
    @Override public String secondExpressionInvalidKey(){
      return SubstringExpression_InvalidSecondExpression;
    }
    @Override public String secondExpressionMissingKey(){
      return SubstringExpression_MissingSecondExpression;
    }
    @Override public String thirdExpressionInvalidKey(){
      return SubstringExpression_InvalidThirdExpression;
    }
    @Override public String thirdExpressionMissingKey(){
      return SubstringExpression_MissingThirdExpression;
    }
  }
;
}

Fixed version (ground truth):
protected AbstractTripleEncapsulatedExpressionHelper<SubstringExpression> buildSubstringExpressionHelper(){
  return new AbstractTripleEncapsulatedExpressionHelper<SubstringExpression>(){
    @Override public String firstCommaMissingKey(){
      return SubstringExpression_MissingFirstComma;
    }
    @Override public String firstExpressionInvalidKey(){
      return SubstringExpression_InvalidFirstExpression;
    }
    @Override public String firstExpressionMissingKey(){
      return SubstringExpression_MissingFirstExpression;
    }
    public String identifier(    SubstringExpression expression){
      return SUBSTRING;
    }
    @Override public boolean isFirstExpressionValid(    SubstringExpression expression){
      return isValid(expression.getFirstExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    @Override public boolean isSecondExpressionValid(    SubstringExpression expression){
      return isValid(expression.getSecondExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    @Override public boolean isThirdExpressionValid(    SubstringExpression expression){
      return isValid(expression.getThirdExpression(),SimpleArithmeticExpressionBNF.ID);
    }
    public String leftParenthesisMissingKey(){
      return SubstringExpression_MissingLeftParenthesis;
    }
    public String rightParenthesisMissingKey(){
      return SubstringExpression_MissingRightParenthesis;
    }
    @Override public String secondCommaMissingKey(){
      return SubstringExpression_MissingSecondComma;
    }
    @Override public String secondExpressionInvalidKey(){
      return SubstringExpression_InvalidSecondExpression;
    }
    @Override public String secondExpressionMissingKey(){
      return SubstringExpression_MissingSecondExpression;
    }
    @Override public String thirdExpressionInvalidKey(){
      return SubstringExpression_InvalidThirdExpression;
    }
    @Override public String thirdExpressionMissingKey(){
      return SubstringExpression_MissingThirdExpression;
    }
  }
;
}