<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - PromiseSubclass.resolve does not &quot;cast&quot; correctly"
   href="https://bugs.webkit.org/show_bug.cgi?id=149477">149477</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>PromiseSubclass.resolve does not &quot;cast&quot; correctly
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Major
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>stefan.penner&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre><a href="http://www.ecma-international.org/ecma-262/6.0/#sec-promise.resolve">http://www.ecma-international.org/ecma-262/6.0/#sec-promise.resolve</a>

the following lines of the spec text:

25.4.4.5.a 
25.4.4.5.c

Indicate

class PromiseSubclass extends Promise { }
PromiseSubclass.resolve(Promise.resolve()).constructor === PromiseSubclass;

Unfortunately, today the following is true:

PromiseSubclass.resolve(Promise.resolve()).constructor === Promise;

Related patch to V8 -&gt; <a href="https://codereview.chromium.org/1362773002">https://codereview.chromium.org/1362773002</a></pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>