[Webkit-unassigned] [Bug 196804] New: Web Inspector: Uncaught Exception: null is not an object (evaluating 'this.selectedTreeElement.reveal')

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196804

            Bug ID: 196804
           Summary: Web Inspector: Uncaught Exception: null is not an
                    object (evaluating 'this.selectedTreeElement.reveal')
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
               URL: https://webkit.org/
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: drousso at apple.com
                CC: inspector-bugzilla-changes at group.apple.com

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Inspected URL:        https://webkit.org/
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko)
Dispatch Source:      Protocol Event

Protocol Event:
{"method":"Target.dispatchMessageFromTarget","params":{"targetId":"page-1","message":"{\"result\":{\"root\":{\"nodeId\":903,\"nodeType\":9,\"nodeName\":\"#document\",\"localName\":\"\",\"nodeValue\":\"\",\"childNodeCount\":2,\"children\":[{\"nodeId\":904,\"nodeType\":10,\"nodeName\":\"html\",\"localName\":\"\",\"nodeValue\":\"\",\"publicId\":\"\",\"systemId\":\"\"},{\"nodeId\":905,\"nodeType\":1,\"nodeName\":\"HTML\",\"localName\":\"html\",\"nodeValue\":\"\",\"childNodeCount\":2,\"children\":[{\…
Dispatch Source:      Protocol Command Response

Protocol Command Response:
{"result":{"root":{"nodeId":903,"nodeType":9,"nodeName":"#document","localName":"","nodeValue":"","childNodeCount":2,"children":[{"nodeId":904,"nodeType":10,"nodeName":"html","localName":"","nodeValue":"","publicId":"","systemId":""},{"nodeId":905,"nodeType":1,"nodeName":"HTML","localName":"html","nodeValue":"","childNodeCount":2,"children":[{"nodeId":906,"nodeType":1,"nodeName":"HEAD","localName":"head","nodeValue":"","childNodeCount":42,"attributes":[]},{"nodeId":907,"nodeType":1,"nodeName":"B…

Protocol Command Request:
{"id":522,"method":"DOM.getDocument"}

Uncaught Exceptions:
 - null is not an object (evaluating 'this.selectedTreeElement.reveal') (at DOMTreeOutline.js:201:33)
    update @ DOMTreeOutline.js:201:33
    rootDOMNode @ DOMTreeOutline.js:109:20
    _rootDOMNodeAvailable @ FrameDOMTreeContentView.js:65:28
    _rootDOMNodeAvailable @ [native code]
    dispatchCallbacks @ DOMTree.js:179:52
    mainDocumentAvailable @ DOMTree.js:169:35
    mainDocumentAvailable @ [native code]
    ? @ DOMManager.js:115:25
    _dispatchResponseToCallback @ Connection.js:148:27
    _dispatchResponse @ Connection.js:118:45
    dispatch @ Connection.js:70:35
    dispatchMessageFromTarget @ TargetManager.js:101:35
    dispatchMessageFromTarget @ TargetObserver.js:42:51
    dispatchEvent @ InspectorBackend.js:340:42
    _dispatchEvent @ Connection.js:195:32
    dispatch @ Connection.js:72:32
    dispatch @ InspectorBackend.js:178:52
    dispatchNextQueuedMessageFromBackend @ MessageDispatcher.js:42:34

Additional Details:
    cause --> An uncaught exception was thrown while dispatching response callback for comman

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