[Webkit-unassigned] [Bug 161554] New: Object.preventExtensions() should throw a TypeError if [[PreventExtensions]] returns false

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161554

            Bug ID: 161554
           Summary: Object.preventExtensions() should throw a TypeError if
                    [[PreventExtensions]] returns false
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
               URL: https://tc39.github.io/ecma262/#sec-object.preventexte
                    nsions
                OS: Unspecified
            Status: NEW
          Keywords: WebExposed
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cdumez at apple.com
                CC: ggaren at apple.com, mark.lam at apple.com,
                    sbarati at apple.com

Object.preventExtensions() should throw a TypeError if [[PreventExtensions]] returns false:
- https://tc39.github.io/ecma262/#sec-object.preventextensions

We currently do not throw.

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