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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [CSS Grid Layout] Flex tracks sizing alg must handle 0fr values"
   href="https://bugs.webkit.org/show_bug.cgi?id=148944">148944</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[CSS Grid Layout] Flex tracks sizing alg must handle 0fr values
          </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></table>
      <p>
        <div>
        <pre>We don't allow 0 as flexible size value, which is not following current specs; it just states that it must be a positive value. 

Besides, we don't manage properly fraction units when using indefinite size for the grid container. We could use this opportunity to implement the new algorithm for determining the flexible tracks sizes, because we are still using the old one.</pre>
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