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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Unexpected exception assigning to this._property inside arrow function"
   href="https://bugs.webkit.org/show_bug.cgi?id=152028#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Unexpected exception assigning to this._property inside arrow function"
   href="https://bugs.webkit.org/show_bug.cgi?id=152028">bug 152028</a>
              from <span class="vcard"><a class="email" href="mailto:joepeck&#64;webkit.org" title="Joseph Pecoraro &lt;joepeck&#64;webkit.org&gt;"> <span class="fn">Joseph Pecoraro</span></a>
</span></b>
        <pre>For example, I would expect these to be identical in this situation:

        this._id = requestAnimationFrame(() =&gt; {
            this._id = undefined;
        });

        this._id = requestAnimationFrame(function() {
            this._id = undefined;
        }.bind(this));

However currently the arrow function version is throwing that runtime exception.</pre>
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