[Webkit-unassigned] [Bug 12535] New: kjs garbage collector frees in used object

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=12535

           Summary: kjs garbage collector frees in used object
           Product: WebKit
           Version: 420+ (nightly)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Major
          Priority: P1
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: huanr at yahoo.com
                CC: morganl.webkit at yahoo.com


on windows platform, I observed quite a few crashes at kjs_pcre_exec(). the
cause has been traced back to previous call at 

KJS::FunctionCallDotNode::evaluate
-> KJS::StringImp::toObject
-> KJS::StringInstance::StringInstance
-> KJS::jsString

where the garbage collector frees an object in use. This incorrect free casues
memory corruption and leads to later crash at kjs_pcre_exec()


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