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      <base href="https://bugs.documentfoundation.org/">
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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Move slides in LO Impress -> slides disappear and finally it leads to crash"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123859">123859</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Move slides in LO Impress -> slides disappear and finally it leads to crash
          </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>Linux (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>Impress
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>vercha@basealt.ru
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
Move slides in LO Impress -> slides disappear and finally it leads to crash

Steps to Reproduce:
This crash was found when I was trying to reproduce
<a class="bz_bug_link 
          bz_status_VERIFIED  bz_closed"
   title="VERIFIED FIXED - kde5: Rearranging Impress slides via drag'n'drop not always working as expected"
   href="show_bug.cgi?id=120774">https://bugs.documentfoundation.org/show_bug.cgi?id=120774</a>

1. Create test presentation with 4-5 slides
2. In the slide bar left-click on the last slide, keep mouse button pressed and
drag the mouse to another position (for example, before the 1st slide).
3. Do the same 2-3 times

Actual Results:
- some slides disappear
- crash of the application

See video in the attachment

Expected Results:
- slides don't disappear
- no crash


Reproducible: Always


User Profile Reset: No



Additional Info:
Reproduced for

Version: 6.3.0.0.alpha0+
Build ID: bbc5347be70d11d187cd537dd73cdab584def719
CPU threads: 1; OS: Linux 4.19; UI render: default; VCL: kde5; 
TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time:
2019-03-03_20:19:18
Locale: ru-RU (ru_RU.UTF-8); UI-Language: en-US
Calc: threaded

NOT reproduced if to start LO with gtk3</pre>
        </div>
      </p>


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