[Webkit-unassigned] [Bug 52515] New: [jsfunfuzz] Crash in defineProperty

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52515

           Summary: [jsfunfuzz] Crash in defineProperty
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com
                CC: ggaren at apple.com, jruderman at gmail.com,
                    barraclough at apple.com
            Blocks: 13638


Created an attachment (id=79070)
 --> (https://bugs.webkit.org/attachment.cgi?id=79070&action=review)
Testcase

tryItOut("")
/**/tryItOut("((x=eval.__defineSetter__(\"x\",(new Function(\"(x)\")))))")
/**/c=4;tryItOut("if((Object.defineProperty(eval,\"x\",({configurable:false,n:true}))))(d)")

Quick look implies incomplete property descriptor (leading to null descriptor.value(), leading to null deref).
This probably impacts shipping webkit.

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