[Webkit-unassigned] [Bug 28997] New: Web Inspector Assertion failure related to marking

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=28997

           Summary: Web Inspector Assertion failure related to marking
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jberlin at webkit.org
                CC: mrowe at apple.com, oliver at apple.com, darin at apple.com


In a debug build (r48097), interacting with the web inspector causes an
assertion failure in JSC::MarkStack::append

ASSERTION FAILED: !m_isCheckingForDefaultMarkViolation
(/Users/jessieberlin/WebKit/WebKitBuild/Debug/JavaScriptCore.framework/PrivateHeaders/JSCell.h:329
void JSC::MarkStack::append(JSC::JSCell*))

Steps to reproduce:

1. Make sure the Develop menu is showing in the menu bar.
2. Navigate to a web page (e.g. webkit.org)
3. Inspect any element on the page.
4. Interact with the Web Inspector (e.g. expand or collapse "Computed Style")
5. Note that safari crashes with the assertion above.

Possibly related to http://trac.webkit.org/changeset/48068

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