[Webkit-unassigned] [Bug 217939] New: REGRESSION(r?): Web Inspector: WI.Sidebar.Event.CollapsedStateChanged is undefined

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217939

            Bug ID: 217939
           Summary: REGRESSION(r?): Web Inspector:
                    WI.Sidebar.Event.CollapsedStateChanged is undefined
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                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

The following asserts are failing when opening Web Inspector:

[Error] Assertion Failed: Object.addEventListener: invalid event type  – undefined – "(listener: " (4)
function (event) { WI._tabBrowserSizeDidChange(); }
"thisObject: "
null
")"
        addEventListener (Object.js:39)
        (anonymous function) (Main.js:280)

[Error] Assertion Failed: Object.addEventListener: invalid event type  – undefined – "(listener: " (4)
function (event) { WI._tabBrowserSizeDidChange(); }
"thisObject: "
null
")"
        addEventListener (Object.js:39)
        (anonymous function) (Main.js:284)

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