[Webkit-unassigned] [Bug 164795] New: Uncaught Exception: TypeError: null is not an object (evaluating 'this.treeOutline._visible')

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164795

            Bug ID: 164795
           Summary: Uncaught Exception: TypeError: null is not an object
                    (evaluating 'this.treeOutline._visible')
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: file:///Users/whsieh/pweb/examples/playback.html
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com
                CC: bburg at apple.com, joepeck at webkit.org,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

-------
Inspected URL:        file:///Users/whsieh/pweb/examples/playback.html
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13) AppleWebKit/603.1.13+ (KHTML, like Gecko)

Uncaught Exceptions:
 - TypeError: null is not an object (evaluating 'this.treeOutline._visible') (at DOMTreeElement.js:364:64)
    _updateChildren @ DOMTreeElement.js:364:64
    _updateChildren @ [native code]
    getChildNodes @ DOMNode.js:462:25
    updateChildren @ DOMTreeElement.js:336:45
    _updateModifiedNodes @ DOMTreeUpdater.js:124:45
    performWork @ Utilities.js:1356:47
-------

* STEPS TO REPRODUCE
1. What were you doing? Include setup or other preparations to reproduce the exception.
2. Include explicit, accurate, and minimal steps taken. Do not include extraneous or irrelevant steps.

* NOTES
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