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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 - Crash: Run Swam Non Linear Solver with blank input"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=135211">135211</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Crash: Run Swam Non Linear Solver with blank input
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>7.1.0.0.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>souichirho@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
after following step, application is crashed
detail is screen cast, please see attachment video file.
note: step 5 can be skip, but the case of skip -> test time is very long!


Steps to Reproduce:
1. open calc
2. open solver ( tool > solver)
-> popup Solver window
3. press Options
4. select Solver engine to Swarm Non-Linear Solver.
5. set Solving time to 10 
6. press OK on Options window
7. press solve
... start solve but after a short time, application crash.


Actual Results:
application crash


Expected Results:
not application crash
on "by changing cells" is blank, solver process can not be run. (i.e. popup
error) 


Reproducible: Always


User Profile Reset: No



Additional Info:
I confirm this version.

Version: 7.1.0.0.alpha0+
Build ID: <buildversion>
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time:
2020-07-23_16:54:25
Calc: threaded</pre>
        </div>
      </p>


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