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<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>
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<th>Summary</th>
<td>Uncaught Exception in TimelineDataGrid._updatePopoverForSelectedNode()
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>All
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<th>URL</th>
<td>file:///Users/bburg/repos/webkit/OpenSource/WebKitBuild/Release/WebInspectorUI.framework/Resources/Main.html
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Web Inspector
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>bburg@apple.com
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<th>CC</th>
<td>bburg@apple.com, graouts@webkit.org, joepeck@webkit.org, mattbaker@apple.com, nvasilyev@apple.com, timothy@apple.com, webkit-bug-importer@group.apple.com
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<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 & Rendering timeline
3. Sort by duration by clicking on the heading
-> 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>
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