Program: 178894
Project: 178894
Buggy source:
private void updateInfo(){
  if (form != null) {
    PageEditorInput input=(PageEditorInput)getEditorInput();
    if (input != null) {
      XWikiEclipsePage page=input.getPage();
      int version=page.getMajorVersion();
      int minorVersion=page.getMinorVersion();
      if (version > 65536) {
        int temp=version;
        version=temp >> 16;
        minorVersion=temp & 0xFFFF;
      }
      if (page.getId().indexOf('.') != -1) {
        XWikiExtendedId extendedId=new XWikiExtendedId(page.getId());
        String language="String_Node_Str";
        if (page.getLanguage() != null) {
          if (!page.getLanguage().equals("String_Node_Str")) {
            language=page.getLanguage();
          }
        }
        form.setText(String.format("String_Node_Str",extendedId.getBasePageId(),version,minorVersion,language,input.isReadOnly() ? "String_Node_Str" : "String_Node_Str"));
      }
 else {
        form.setText(String.format("String_Node_Str",page.getTitle(),version,minorVersion,input.isReadOnly() ? "String_Node_Str" : "String_Node_Str"));
      }
    }
    if (input.getPage().getDataManager().isInConflict(input.getPage().getId())) {
      boolean editConlictActionFound=false;
      for (      IContributionItem contributionItem : form.getToolBarManager().getItems()) {
        if (contributionItem instanceof ActionContributionItem) {
          ActionContributionItem actionContributionItem=(ActionContributionItem)contributionItem;
          if (actionContributionItem.getAction().equals(editConflictAction)) {
            editConlictActionFound=true;
          }
        }
      }
      if (!editConlictActionFound) {
        form.getToolBarManager().add(editConflictAction);
        form.updateToolBar();
      }
      form.setMessage("String_Node_Str",IMessageProvider.WARNING);
    }
 else {
      form.getToolBarManager().removeAll();
      form.updateToolBar();
      form.setMessage(input.getPage().getDataManager().getName());
    }
  }
}

Fixed version (ground truth):
private void updateInfo(){
  if (form != null) {
    PageEditorInput input=(PageEditorInput)getEditorInput();
    if (input != null) {
      XWikiEclipsePage page=input.getPage();
      int version=page.getMajorVersion();
      int minorVersion=page.getMinorVersion();
      if (version > 65536) {
        int temp=version;
        version=temp >> 16;
        minorVersion=temp & 0xFFFF;
      }
      if (page.getId().indexOf('.') != -1) {
        XWikiExtendedId extendedId=new XWikiExtendedId(page.getId());
        String language="String_Node_Str";
        if (page.getLanguage() != null) {
          if (!page.getLanguage().equals("String_Node_Str")) {
            language=page.getLanguage();
          }
        }
        form.setText(String.format("String_Node_Str",extendedId.getBasePageId(),version,minorVersion,language,input.isReadOnly() ? "String_Node_Str" : "String_Node_Str"));
      }
 else {
        form.setText(String.format("String_Node_Str",page.getTitle(),version,minorVersion,input.isReadOnly() ? "String_Node_Str" : "String_Node_Str"));
      }
    }
    String pageId=StorageUtils.getExtendedPageId(input.getPage().getId(),input.getPage().getLanguage());
    if (input.getPage().getDataManager().isInConflict(pageId)) {
      boolean editConlictActionFound=false;
      for (      IContributionItem contributionItem : form.getToolBarManager().getItems()) {
        if (contributionItem instanceof ActionContributionItem) {
          ActionContributionItem actionContributionItem=(ActionContributionItem)contributionItem;
          if (actionContributionItem.getAction().equals(editConflictAction)) {
            editConlictActionFound=true;
          }
        }
      }
      if (!editConlictActionFound) {
        form.getToolBarManager().add(editConflictAction);
        form.updateToolBar();
      }
      form.setMessage("String_Node_Str",IMessageProvider.WARNING);
    }
 else {
      form.getToolBarManager().removeAll();
      form.updateToolBar();
      form.setMessage(input.getPage().getDataManager().getName());
    }
  }
}