[Webkit-unassigned] [Bug 159696] New: Uncaught Exception: TypeError: null is not an object (evaluating 'this._contentViewContainer.currentContentView.showsFilterBar')

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159696

            Bug ID: 159696
           Summary: Uncaught Exception: TypeError: null is not an object
                    (evaluating
                    'this._contentViewContainer.currentContentView.showsFi
                    lterBar')
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: http://daringfireball.net/
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                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

Summary:
Uncaught exception closing Timeline Tab while viewing Script & Events Timeline.

Steps to Reproduce:
1. Inspect this page
2. Show timeline tab
3. Enable Scripts + Events timeline
4. Reload => populate timeline data
5. Select Script + Events timeline
6. Close Timeline Tab
  => Uncaught exception

Uncaught Exceptions:
 - TypeError: null is not an object (evaluating 'this._contentViewContainer.currentContentView.showsFilterBar') (at ScriptClusterTimelineView.js:65:80)
    showsFilterBar @ ScriptClusterTimelineView.js:65:80
    _updateFilterBar @ TimelineRecordingContentView.js:800:102
    _contentViewSelectionPathComponentDidChange @ TimelineRecordingContentView.js:325:30
    dispatch @ Object.js:162:30
    dispatchEventToListeners @ Object.js:177:21
    _currentContentViewDidChange @ ClusterContentView.js:225:38
    dispatch @ Object.js:162:30
    dispatchEventToListeners @ Object.js:169:17
    closeAllContentViews @ ContentViewContainer.js:345:38
    closed @ ClusterContentView.js:75:56
    _disassociateFromContentView @ ContentViewContainer.js:476:27
    closeAllContentViews @ ContentViewContainer.js:339:46
    closed @ TimelineRecordingContentView.js:198:79
    _disassociateFromContentView @ ContentViewContainer.js:476:27
    closeAllContentViews @ ContentViewContainer.js:339:46
    closed @ ContentBrowserTabContentView.js:121:71
    closed @ TimelineTabContentView.js:298:21
    _disassociateFromContentView @ ContentViewContainer.js:476:27
    closeContentView @ ContentViewContainer.js:309:46
    _tabBarItemRemoved @ TabBrowser.js:238:52
    dispatch @ Object.js:162:30
    dispatchEventToListeners @ Object.js:169:17
    removeTabBarItem @ TabBar.js:298:38
    _handleClick @ TabBar.js:607:34
    _handleClick @ [native code]

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