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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [JSC] implement async functions proposal"
   href="https://bugs.webkit.org/show_bug.cgi?id=156147#c67">Comment # 67</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [JSC] implement async functions proposal"
   href="https://bugs.webkit.org/show_bug.cgi?id=156147">bug 156147</a>
              from <span class="vcard"><a class="email" href="mailto:utatane.tea&#64;gmail.com" title="Yusuke Suzuki &lt;utatane.tea&#64;gmail.com&gt;"> <span class="fn">Yusuke Suzuki</span></a>
</span></b>
        <pre>Comment on <span class=""><a href="attachment.cgi?id=277702&amp;action=diff" name="attach_277702" title="Patch">attachment 277702</a> <a href="attachment.cgi?id=277702&amp;action=edit" title="Patch">[details]</a></span>
Patch

View in context: <a href="https://bugs.webkit.org/attachment.cgi?id=277702&amp;action=review">https://bugs.webkit.org/attachment.cgi?id=277702&amp;action=review</a>

<span class="quote">&gt;&gt; Source/JavaScriptCore/builtins/AsyncFunctionPrototype.js:30
&gt;&gt; +    let value = &#64;undefined;
&gt; 
&gt; Let's insert
&gt; 
&gt; if (typeof state !== 'number')
&gt;     throw new &#64;TypeError(&quot;|this| should be an async function&quot;);
&gt; 
&gt; test here.</span >

Ah, I misunderstood. Here, we can ensure that this `generator` is always a generator.</pre>
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