[Webkit-unassigned] [Bug 139906] New: [Win] Periodic failure in DumpRenderTree related to WebActionPropertyBag::Read

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139906

            Bug ID: 139906
           Summary: [Win] Periodic failure in DumpRenderTree related to
                    WebActionPropertyBag::Read
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

Created attachment 243680
  --> https://bugs.webkit.org/attachment.cgi?id=243680&action=review
Crash log

A number of tests fail (unreliably) due to some kind of heap corruption that manifests as a crash in WebActionPropertyBag:

STACK_COMMAND:  .ecxr ; kb ; dps 774842a8 ; kb

FOLLOWUP_IP: 
WebKit!WebActionPropertyBag::Read+28 [c:\cygwin\home\buildbot\slave\win-release\build\source\webkit\win\webactionpropertybag.cpp @ 115]
021da358 b9e4a1c802      mov     ecx,offset WebKit!piOverFourDouble+0xd4 (02c8a1e4)

FAULT_INSTR_CODE:  c8a1e4b9

FAULTING_SOURCE_LINE:  c:\cygwin\home\buildbot\slave\win-release\build\source\webkit\win\webactionpropertybag.cpp

FAULTING_SOURCE_FILE:  c:\cygwin\home\buildbot\slave\win-release\build\source\webkit\win\webactionpropertybag.cpp

FAULTING_SOURCE_LINE_NUMBER:  115

FAULTING_SOURCE_CODE:  
   111:         return E_POINTER;
   112: 
   113:     VariantClear(pVar);
   114: 
>  115:     if (isEqual(pszPropName, WebActionNavigationTypeKey)) {
   116:         V_VT(pVar) = VT_I4;
   117:         V_I4(pVar) = m_action.type();
   118:         return S_OK;
   119:     }
   120:     if (isEqual(pszPropName, WebActionElementKey)) {

See the attached debug dump.

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