[Webkit-unassigned] [Bug 207248] New: [Web Inspector][WinCairo] The error "TypeError:​ selection.focusNode.closest is not a function." happens by selecting an error message

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=207248

            Bug ID: 207248
           Summary: [Web Inspector][WinCairo] The error "TypeError:​
                    selection.focusNode.closest is not a function."
                    happens by selecting an error message
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
                CC: inspector-bugzilla-changes at group.apple.com

[Web Inspector][WinCairo] The error "TypeError:​ selection.focusNode.closest is not a function." happens by selecting an error message

I tested with WinCairo WK2, trunk, r255482.

1. Start MiniBrowser
2. Open Web Inspector
3. Open Console Tab
4. Enter "foo"
5. An error message "ReferenceError: Can't find variable: foo" is output
6. Press left mouse button on the string of the error message
6. Drug the mouse
7. "TypeError:​ selection.focusNode.closest is not a function." happens

These uncaught exceptions caused the problem:
TypeError:​ selection.focusNode.closest is not a function. (In 'selection.focusNode.closest("." + WI.LogContentView.ItemWrapperStyleClassName)​', 'selection.focusNode.closest' is undefined)​ (at LogContentView.js:​552:​54)​
    _mousemove @ LogContentView.js:​552:​54
    handleEvent @ LogContentView.js:​653:​28

I don't see this issue in Mac port.

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