[Webkit-unassigned] [Bug 70812] New: Web Inspector: JS exception in JavaScriptSourceFrame.onShowPopover/showObjectPopover()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=70812

           Summary: Web Inspector: JS exception in
                    JavaScriptSourceFrame.onShowPopover/showObjectPopover(
                    )
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Keywords: Regression
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: caseq at chromium.org
                CC: timothy at apple.com, rik at webkit.org, keishi at webkit.org,
                    pmuellr at yahoo.com, joepeck at webkit.org,
                    pfeldman at chromium.org, yurys at chromium.org,
                    bweinstein at apple.com, apavlov at chromium.org,
                    loislo at chromium.org, podivilov at chromium.org


There's a race condition in showObjectPopover() -- sometimes, popover may be hidden while a popover expression is being evaluated in the inspected page. In this case, _highlightElement becomes undefined and this._highlightElement.addStyleClass() call in showObjectPopover() results in an exception.

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