[Webkit-unassigned] [Bug 170964] New: Uncaught Exception: TypeError: null is not an object (evaluating 'event.relatedTarget.isDescendant')

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=170964

            Bug ID: 170964
           Summary: Uncaught Exception: TypeError: null is not an object
                    (evaluating 'event.relatedTarget.isDescendant')
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: file:///Volumes/Home/aaronchu/Work/reduced-test-cases/
                    video/voiceover_video_issue.html
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aaron_chu at apple.com
                CC: inspector-bugzilla-changes at group.apple.com

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Inspected URL:        file:///Volumes/Home/aaronchu/Work/reduced-test-cases/video/voiceover_video_issue.html
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/604.1.18+ (KHTML, like Gecko)

Uncaught Exceptions:
 - TypeError: null is not an object (evaluating 'event.relatedTarget.isDescendant') (at CSSStyleDeclarationSection.js:694:32)
    _handleBlur @ CSSStyleDeclarationSection.js:694:32
    _handleBlur @ [native code]
-------

* 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
Document any additional information that might be useful in resolving the problem, such as screen shots or other included attachments.

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