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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 - Scrollbar doesn't show up in a container with position:fixed"
   href="https://bugs.webkit.org/show_bug.cgi?id=148033">148033</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Scrollbar doesn't show up in a container with position:fixed
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>528+ (Nightly build)
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Mac OS X 10.10
          </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>New Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>egarciad&#64;google.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=259025" name="attach_259025" title="try to scroll the content inside the red box.">attachment 259025</a> <a href="attachment.cgi?id=259025&amp;action=edit" title="try to scroll the content inside the red box.">[details]</a></span>
try to scroll the content inside the red box.

A simple example can repro this issue:


&lt;body&gt;
  &lt;div id=&quot;#red&quot; style=&quot;position: fixed; width: 200px; height: 200px; top: 0px; left: 0; background-color:red; overflow-y: auto;&quot;&gt;
      &lt;div style=&quot;height: 3000px; width: 10px; background: green; margin: 10px;&quot;&gt;&lt;/div&gt;
  &lt;/div&gt;
&lt;/body&gt;

the scrollbar in #red doesn't render anymore, but if I change its position to absolute, then the scrollbar is back.</pre>
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      </p>
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