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        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - SIGSEGV when passing GL_NONE to glReadBuffer"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=73956">73956</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>mesa-dev@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>SIGSEGV when passing GL_NONE to glReadBuffer
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ahmabdabd@hotmail.com
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>git
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Mesa core
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=92635" name="attach_92635" title="Patch against git  6ec210989fa10847091f06fcfcab77dd07618dff">attachment 92635</a> <a href="attachment.cgi?id=92635&action=edit" title="Patch against git  6ec210989fa10847091f06fcfcab77dd07618dff">[details]</a></span>
Patch against git  6ec210989fa10847091f06fcfcab77dd07618dff

Mesa crashes instead of returning GL_INVALID_ENUM when GL_NONE is passed as an
argument to glReadBuffer.

Attached is a patch to achieve the desired behavior.</pre>
        </div>
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