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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 - [css-grid] margin-left:auto and margin-top:auto discards the margin on opposite side"
   href="https://bugs.webkit.org/show_bug.cgi?id=151802">151802</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[css-grid] margin-left:auto and margin-top:auto discards the margin on opposite side
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </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>Layout and Rendering
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>jfernandez&#64;igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>simon.fraser&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=266524" name="attach_266524" title="test cases">attachment 266524</a> <a href="attachment.cgi?id=266524&amp;action=edit" title="test cases">[details]</a></span>
test cases

It seems that when some of the margins are auto, the other specified margins are just ignored. 

The issue is affecting margins in all directions, as it can be appreciated in the attached test case.</pre>
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