Program: 127692
Project: 127692
Buggy source:
protected void evaluateTextField(){
  if (readOnly) {
    return;
  }
  if (nameText == null || nameText.isDisposed()) {
    return;
  }
  if (nameText.getText().length() == 0) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (!Pattern.matches(RepositoryConstants.getPattern(getRepositoryObjectType()),nameText.getText()) || nameText.getText().trim().contains("String_Node_Str")) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (JavaConventions.validateClassFileName(nameText.getText() + CLASS,JavaCore.getOption(JavaCore.COMPILER_SOURCE),JavaCore.getOption(JavaCore.COMPILER_COMPLIANCE)).getSeverity() == IStatus.ERROR || "String_Node_Str".equalsIgnoreCase(nameText.getText())) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (nameModifiedByUser) {
    if (retrieveNameFinished) {
      if (!isValid(nameText.getText())) {
        nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
      }
 else {
        nameStatus=createOkStatus();
      }
    }
 else {
      nameStatus=createStatus(IStatus.ERROR,"String_Node_Str");
    }
  }
 else {
    nameStatus=createOkStatus();
  }
  if (property != null && nameStatus.getSeverity() == IStatus.OK) {
    property.setLabel(getPropertyLabel(StringUtils.trimToNull(nameText.getText())));
    property.setDisplayName(StringUtils.trimToNull(nameText.getText()));
    property.setModificationDate(new Date());
  }
  updatePageStatus();
}

Fixed version (ground truth):
protected void evaluateTextField(){
  ERepositoryObjectType type=ERepositoryObjectType.getItemType(this.property.getItem());
  if (readOnly) {
    return;
  }
  if (nameText == null || nameText.isDisposed()) {
    return;
  }
  if (nameText.getText().length() == 0) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (!Pattern.matches(RepositoryConstants.getPattern(getRepositoryObjectType()),nameText.getText()) || nameText.getText().startsWith("String_Node_Str") || nameText.getText().trim().contains("String_Node_Str")) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (type != null && type.getType().equals("String_Node_Str")) {
    if (isKeywords(nameText.getText()) || "String_Node_Str".equalsIgnoreCase(nameText.getText())) {
      nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
    }
    if (nameModifiedByUser) {
      if (retrieveNameFinished) {
        if (!isValid(nameText.getText())) {
          nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
        }
 else {
          nameStatus=createOkStatus();
        }
      }
 else {
        nameStatus=createStatus(IStatus.ERROR,"String_Node_Str");
      }
    }
  }
 else   if (JavaConventions.validateClassFileName(nameText.getText() + CLASS,JavaCore.getOption(JavaCore.COMPILER_SOURCE),JavaCore.getOption(JavaCore.COMPILER_COMPLIANCE)).getSeverity() == IStatus.ERROR || "String_Node_Str".equalsIgnoreCase(nameText.getText())) {
    nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
  }
 else   if (nameModifiedByUser) {
    if (retrieveNameFinished) {
      if (!isValid(nameText.getText())) {
        nameStatus=createStatus(IStatus.ERROR,Messages.getString("String_Node_Str"));
      }
 else {
        nameStatus=createOkStatus();
      }
    }
 else {
      nameStatus=createStatus(IStatus.ERROR,"String_Node_Str");
    }
  }
 else {
    nameStatus=createOkStatus();
  }
  if (property != null && nameStatus.getSeverity() == IStatus.OK) {
    property.setLabel(getPropertyLabel(StringUtils.trimToNull(nameText.getText())));
    property.setDisplayName(StringUtils.trimToNull(nameText.getText()));
    property.setModificationDate(new Date());
  }
  updatePageStatus();
}