[Webkit-unassigned] [Bug 107579] New: REGRESSION(r140231): media track layout tests crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107579

           Summary: REGRESSION(r140231): media track layout tests crashing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: hclam at google.com
                CC: sam at webkit.org, dgorbik at apple.com


On Chromium bots we recorded these crashes:

media/track/track-css-cue-lifetime.html
media/track/track-css-matching.html
media/track/track-css-property-whitelist.html

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=@ToT - chromium.org&tests=media/track/track-css-cue-lifetime.html,media/track/track-css-matching.html,media/track/track-css-property-whitelist.html

Log points to r140231.

Crash log:

crash log for DumpRenderTree (pid 14860):
STDOUT: <empty>
STDERR: ASSERTION FAILED: !element || element->isHTMLUnknownElement()
STDERR: Backtrace:
STDERR:     std::_Init_locks::operator= [0x5FC49F63+172035]
STDERR:     std::_Init_locks::operator= [0x5FC49EEA+171914]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5F29AB88+15414024]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5F22C79E+14962462]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E52BA62+1327586]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E52AE50+1324496]
STDERR:     v8::Locker::StopPreemption [0x6BF16357+811159]
STDERR:     v8::Locker::StopPreemption [0x6BF18D6A+821930]
STDERR:     v8::Locker::StopPreemption [0x6C163D0C+3226188]
STDERR:     v8::Locker::StopPreemption [0x6C169EF1+3251249]
STDERR:     (No symbol) [0x1C80A3F6]
STDERR:     (No symbol) [0x1C83C53B]
STDERR:     (No symbol) [0x1C80E581]
STDERR:     (No symbol) [0x1C83B624]
STDERR:     (No symbol) [0x1C822679]
STDERR:     (No symbol) [0x1C8134CA]
STDERR:     v8::Locker::StopPreemption [0x6BEB9B05+432197]
STDERR:     v8::Locker::StopPreemption [0x6BEB98B4+431604]
STDERR:     v8::Function::Call [0x6BE33334+516]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EF43273+11909619]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EF42FF7+11908983]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5F68CB3F+19550911]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5F69A3F2+19606386]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5F69A0F0+19605616]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E99D49F+5987359]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E99CDDF+5985631]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E9CC0AB+6178859]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EB21217+7575959]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EAEC198+7358744]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EAEB8AC+7356460]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EAE929C+7346716]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EAEA5FC+7351676]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5E9CC323+6179491]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EB73503+7912579]
STDERR:     std::_Init_locks::operator= [0x5FDF6E88+1929000]
STDERR:     std::_Init_locks::operator= [0x5FDF7033+1929427]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EE52233+10922419]
STDERR:     WebKit::WebFilterOperation::WebFilterOperation [0x5EE52146+10922182]
STDERR:     WebDropData::operator= [0x69E635FB+214387]
STDERR:     WebDropData::operator= [0x69E712CB+270915]
STDERR:     WebDropData::operator= [0x69E7121A+270738]
STDERR:     WebDropData::operator= [0x69E7113A+270514]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1DE35F+451578]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D292D6B+1191430]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D292A96+1190705]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D29350B+1193382]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D2934BA+1193301]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D29341A+1193141]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1DE35F+451578]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1E9974+498191]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1E9DA4+499263]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1EAC63+503038]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1F9444+562399]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1F8552+558573]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D18660C+91815]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1E94B9+496980]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1E920B+496294]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1B4CE9+281988]
STDERR:     tracked_objects::ParentChildPairSnapshot::ParentChildPairSnapshot [0x6D1E8501+492956]
STDERR:     (No symbol) [0x00D61A4D]
STDERR:     (No symbol) [0x00C7E45D]
STDERR:     (No symbol) [0x00CC6D38]

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