[Webkit-unassigned] [Bug 190766] New: Uncaught Exception: TypeError: null is not an object (evaluating 'mouseBlock.addEventListener')

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190766

            Bug ID: 190766
           Summary: Uncaught Exception: TypeError: null is not an object
                    (evaluating 'mouseBlock.addEventListener')
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: https://www.reddit.com/
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nvasilyev at apple.com
                CC: inspector-bugzilla-changes at group.apple.com

Inspected URL:        https://www.reddit.com/
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/605.1.15 (KHTML, like Gecko)

Uncaught Exceptions:
 - TypeError: null is not an object (evaluating 'mouseBlock.addEventListener') (at NetworkTableContentView.js:761:19)
    _populateWaterfallGraph @ NetworkTableContentView.js:761:19
    tablePopulateCell @ NetworkTableContentView.js:462:41
    _populatedCellForColumnAndRow @ Table.js:758:41
    _populateRow @ Table.js:769:58
    _applyColumnWidths @ Table.js:1110:38
    _resizeColumnsAndFiller @ Table.js:983:32
    resize @ Table.js:234:37
    layout @ Table.js:568:24
    _layoutSubtree @ View.js:278:20
    _layoutSubtree @ View.js:285:32
    _layoutSubtree @ View.js:285:32
    _layoutSubtree @ View.js:285:32
    _layoutSubtree @ View.js:285:32
    _layoutSubtree @ View.js:285:32
    _layoutSubtree @ View.js:285:32
    updateLayout @ View.js:158:28
    _tabBrowserSizeDidChange @ Main.js:1595:33
    _sidebarWidthDidChange @ Main.js:1614:34
    dispatch @ Object.js:170:30
    dispatchEventToListeners @ Object.js:177:17
    _recalculateWidth @ Sidebar.js:290:38
    width @ Sidebar.js:178:31
    _showDetailsSidebarPanelsForTabContentView @ TabBrowser.js:407:33
    _tabBarItemSelected @ TabBrowser.js:255:56
    dispatch @ Object.js:170:30
    dispatchEventToListeners @ Object.js:177:17
    selectedTabBarItem @ LegacyTabBar.js:386:38
    _handleMouseDown @ LegacyTabBar.js:623:13
    _handleMouseDown @ [native code]
-------

* STEPS TO REPRODUCE
1. Open https://www.reddit.com/ (not logged in)
2. Open Web Inspector
3. Click Network tab

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