[Webkit-unassigned] [Bug 158502] New: Uncaught Exception in TimelineDataGrid._updatePopoverForSelectedNode()

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jun 7 17:17:52 PDT 2016


https://bugs.webkit.org/show_bug.cgi?id=158502

            Bug ID: 158502
           Summary: Uncaught Exception in
                    TimelineDataGrid._updatePopoverForSelectedNode()
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: file:///Users/bburg/repos/webkit/OpenSource/WebKitBuil
                    d/Release/WebInspectorUI.framework/Resources/Main.html
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bburg at apple.com
                CC: bburg at apple.com, graouts at webkit.org,
                    joepeck at webkit.org, mattbaker at apple.com,
                    nvasilyev at apple.com, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

-------
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.

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