Program: 25822
Project: 25822
Buggy source:
@Override public void validate(Object object,Errors errors){
  SurveyAnswer answer=(SurveyAnswer)object;
  if (answer.getAnsweredOn() == 0L) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (StringUtils.isBlank(answer.getClient())) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (StringUtils.isBlank(answer.getQuestionGuid())) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (answer.isDeclined()) {
    answer.setAnswer(null);
    answer.setAnswers(null);
  }
 else   if (hasNoAnswer(answer)) {
    rejectField(errors,"String_Node_Str","String_Node_Str");
  }
 else   if (expectsMultipleValues()) {
    validateType(errors,(MultiValueConstraints)question.getConstraints(),answer.getAnswers());
  }
 else   if (isMultiValue()) {
    validateType(errors,(MultiValueConstraints)question.getConstraints(),answer.getAnswer());
  }
 else {
switch (question.getConstraints().getDataType()) {
case DURATION:
      validateType(errors,(DurationConstraints)question.getConstraints(),answer.getAnswer());
    break;
case STRING:
  validateType(errors,(StringConstraints)question.getConstraints(),answer.getAnswer());
break;
case INTEGER:
validateType(errors,(IntegerConstraints)question.getConstraints(),answer.getAnswer());
break;
case DECIMAL:
validateType(errors,(DecimalConstraints)question.getConstraints(),answer.getAnswer());
break;
case BOOLEAN:
validateType(errors,(BooleanConstraints)question.getConstraints(),answer.getAnswer());
break;
case DATE:
case DATETIME:
validateType(errors,(TimeBasedConstraints)question.getConstraints(),answer.getAnswer());
break;
case TIME:
validateType(errors,(TimeConstraints)question.getConstraints(),answer.getAnswer());
break;
}
}
}

Fixed version (ground truth):
@Override public void validate(Object object,Errors errors){
  SurveyAnswer answer=(SurveyAnswer)object;
  if (question == null) {
    errors.reject("String_Node_Str" + answer.getQuestionGuid());
    return;
  }
  errors.pushNestedPath(question.getIdentifier());
  if (answer.getAnsweredOn() == 0L) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (StringUtils.isBlank(answer.getClient())) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (StringUtils.isBlank(answer.getQuestionGuid())) {
    rejectField(errors,"String_Node_Str","String_Node_Str",answer.getQuestionGuid());
  }
  if (answer.isDeclined()) {
    answer.setAnswer(null);
    answer.setAnswers(null);
  }
 else   if (hasNoAnswer(answer)) {
    rejectField(errors,"String_Node_Str","String_Node_Str");
  }
 else   if (expectsMultipleValues()) {
    validateType(errors,(MultiValueConstraints)question.getConstraints(),answer.getAnswers());
  }
 else   if (isMultiValue()) {
    validateType(errors,(MultiValueConstraints)question.getConstraints(),answer.getAnswer());
  }
 else {
switch (question.getConstraints().getDataType()) {
case DURATION:
      validateType(errors,(DurationConstraints)question.getConstraints(),answer.getAnswer());
    break;
case STRING:
  validateType(errors,(StringConstraints)question.getConstraints(),answer.getAnswer());
break;
case INTEGER:
validateType(errors,(IntegerConstraints)question.getConstraints(),answer.getAnswer());
break;
case DECIMAL:
validateType(errors,(DecimalConstraints)question.getConstraints(),answer.getAnswer());
break;
case BOOLEAN:
validateType(errors,(BooleanConstraints)question.getConstraints(),answer.getAnswer());
break;
case DATE:
case DATETIME:
validateType(errors,(TimeBasedConstraints)question.getConstraints(),answer.getAnswer());
break;
case TIME:
validateType(errors,(TimeConstraints)question.getConstraints(),answer.getAnswer());
break;
}
}
errors.popNestedPath();
}