[Webkit-unassigned] [Bug 56062] New: Reproducible ASSERTION failure going to NYTimes.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=56062

           Summary: Reproducible ASSERTION failure going to NYTimes.com
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: WebCore JavaScript
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jberlin at webkit.org
                CC: darin at apple.com, ap at webkit.org,
                    yong.li.webkit at gmail.com


This is also reproducible going to other major websites.

After some bisecting, the assertion failure appears to have started around http://trac.webkit.org/changeset/80478.

>  1 com.apple.WebCore              0x103775887 WebCore::SuspendableTimer::resume() + 0x5b (SuspendableTimer.cpp:76)
   2 com.apple.WebCore              0x103775825 non-virtual thunk to WebCore::SuspendableTimer::resume() + 0x25
   3 com.apple.WebCore              0x10369b46e WebCore::ScriptExecutionContext::resumeActiveDOMObjects() + 0x104 (ScriptExecutionContext.cpp:259)
   4 com.apple.WebCore              0x102836762 WebCore::Document::resumeScheduledTasks() + 0xf0 (Document.cpp:4772)
   5 com.apple.WebCore              0x102ae64f8 WebCore::FrameLoader::setDefersLoading(bool) + 0x196 (FrameLoader.cpp:263)
   6 com.apple.WebCore              0x1033834e1 WebCore::Page::setDefersLoading(bool) + 0xa5 (Page.cpp:548)
   7 com.apple.WebKit2              0x1010b4a30 WebKit::WebPage::setDefersLoading(bool) + 0x44 (WebPage.cpp:454)
   8 com.apple.WebKit2              0x101146bb7 WKBundlePageSetDefersLoading + 0x37 (WKBundlePage.cpp:114)

This also appears to have caused some inspector test failures:

https://bugs.webkit.org/show_bug.cgi?id=55941

Should we roll out this change? It is getting rather annoying to work with this assertion failure getting triggered so often (happens within 10 seconds of browsing)

<rdar://problem/9098548>

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