<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Uncaught Exception in TimelineDataGrid._updatePopoverForSelectedNode()"
   href="https://bugs.webkit.org/show_bug.cgi?id=158502">158502</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Uncaught Exception in TimelineDataGrid._updatePopoverForSelectedNode()
          </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>All
          </td>
        </tr>

        <tr>
          <th>URL</th>
          <td>file:///Users/bburg/repos/webkit/OpenSource/WebKitBuild/Release/WebInspectorUI.framework/Resources/Main.html
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>bburg&#64;apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bburg&#64;apple.com, graouts&#64;webkit.org, joepeck&#64;webkit.org, mattbaker&#64;apple.com, nvasilyev&#64;apple.com, timothy&#64;apple.com, webkit-bug-importer&#64;group.apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>-------
Auto-generated details:

Inspected URL:        file:///Users/bburg/repos/webkit/OpenSource/WebKitBuild/Release/WebInspectorUI.framework/Resources/Main.html
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12) AppleWebKit/602.1.36+ (KHTML, like Gecko)
Uncaught exceptions:
 - ReferenceError: Cannot access uninitialized variable. (at TimelineDataGrid.js:492:23)
-------

* STEPS TO REPRODUCE
1. Create a timeline recording with layout data on it
2. Go to Layout &amp; Rendering timeline
3. Sort by duration by clicking on the heading

-&gt; Exception!

It looks like the code in TimelineDataGrid._updatePopoverForSelectedNode() is pretty messed up. It uses `targetFrame` in a conditional before declaring it a dozen lines later. The conditional itself doesn't look correct either, so this code should be audited when this is looked at.</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>