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      <base href="https://bugs.webkit.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_NEW "
   title="NEW - gUM crashes when creating a MediaStream with only an audio or only a video MediaStreamTrack"
   href="https://bugs.webkit.org/show_bug.cgi?id=158799">158799</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>gUM crashes when creating a MediaStream with only an audio or only a video MediaStreamTrack
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Other
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Media Elements
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>gruan&#64;apple.com
          </td>
        </tr></table>
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        <pre><a href="http://www.w3.org/TR/mediacapture-streams/#methods-5">http://www.w3.org/TR/mediacapture-streams/#methods-5</a>

Currently, the implementation of gUM expects
- The parameter to gUM to have both audio and video constraints to have non-falsy values.
- Both a video and audio source to be available.

The implementation crashes since UserMediaRequest::constraintsValidated expects defined parameters audioSource and videoSource.</pre>
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