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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 - Assertion failed in SvXMLNamespaceMap::GetQNameByKey"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=113841">113841</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assertion failed in SvXMLNamespaceMap::GetQNameByKey
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>6.0.0.0.alpha1+ 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>filters and storage
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>baron@caesar.elte.hu
          </td>
        </tr>

        <tr>
          <th>Blocks</th>
          <td>105537
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Open <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=114686" name="attach_114686" title="Sample XLSX showing issue with importing Data Bar">attachment 114686</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=114686&action=edit" title="Sample XLSX showing issue with importing Data Bar">[details]</a></span> from <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - FILEOPEN: Data Bar imports wrong color"
   href="show_bug.cgi?id=90511">bug 90511</a> with a debug build (asserts are only
checked in debug builds).

=> Assertion failed.

// ... if it isn't, this is a Bad Thing, assert and return the local name
assert(false);
<a href="https://opengrok.libreoffice.org/xref/core/xmloff/source/core/nmspmap.cxx#264">https://opengrok.libreoffice.org/xref/core/xmloff/source/core/nmspmap.cxx#264</a>

These are the parameters:
nKey = 40
rLocalName = width
bCache = true

And indeed, there's no namespace entry with key 40 in the checked containers.
I have a vague memory there was no assert 3 weeks ago, but can't say for sure.

Observed using a fresh LO 6.0 master build
(b56479e88edeabd6c6fe51cc0095a23543229856) / Windows 7.</pre>
        </div>
      </p>

        <div id="referenced">
          <hr style="border: 1px dashed #969696">
          <b>Referenced Bugs:</b>
          <ul>
              <li>
                [<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [META] Assertion failed crashes"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=105537">Bug 105537</a>] [META] Assertion failed crashes
              </li>
          </ul>
        </div>
        <br>

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      <ul>
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