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      <base href="https://bugs.documentfoundation.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Removing cell borders causes Gtk-CRITICAL **: 17:20:04.224: gtk_notebook_get_tab_label: assertion 'list != NULL'"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=122354">122354</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Removing cell borders causes Gtk-CRITICAL **: 17:20:04.224: gtk_notebook_get_tab_label: assertion 'list != NULL'
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>6.3.0.0.alpha0+ Master
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Calc
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>jim.avera@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
In latest master:

Changing cell borders (or removing existing borders) causes a bunch of warnings
to appear on the terminal like this one:

(soffice:22211): Gtk-CRITICAL **: 17:20:04.224: gtk_notebook_get_tab_label:
assertion 'list != NULL' failed


Steps to Reproduce:
1.Open attached demo spreadsheet
2.Click in A1 to select the cell
3.Format->Cells...
4. Click "Borders" tab; then click the left-most Preset (to remove borders)\
5. Click OK

Actual Results:
Above warning appears 7 times on the terminal

Expected Results:
No warnings


Reproducible: Always


User Profile Reset: No



Additional Info:</pre>
        </div>
      </p>


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