[Webkit-unassigned] [Bug 58338] New: ToObject should throw a TypeError on null and undefined

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=58338

           Summary: ToObject should throw a TypeError on null and
                    undefined
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: ES5
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: arv at chromium.org


The following code snippet should throw a TypeError exception but it returns the global object instead.

({}).valueOf.call(null)

15.2.4.4 Object.prototype.valueOf ( )

...

1.    Let O be the result of calling ToObject passing the this value as the argument.

9.9 ToObject

...

Argument Type   Result
Undefined         Throw a TypeError exception.
Null                  Throw a TypeError exception.


The same problem occurs in other places like Array.prototype.slice.call(undefined) etc.

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