[Webkit-unassigned] [Bug 86128] New: Error stack should not be read only

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=86128

           Summary: Error stack should not be read only
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: arv at chromium.org
                CC: oliver at apple.com, barraclough at apple.com
            Blocks: 85057


Both SpiderMonkey and V8 allows the stack property of error objects to be written to.

try {
  throw new Error;
} catch (ex) {
  ex.stack = 42;
  console.assert(e.stack === 42);
}

JSC fails because it treats stack as a read only property.

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