<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 - Promise constructor should throw when not called with "new""
href="https://bugs.webkit.org/show_bug.cgi?id=149380">149380</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Promise constructor should throw when not called with "new"
</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>URL</th>
<td>http://www.ecma-international.org/ecma-262/6.0/#sec-promise-executor
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</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@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ljharb@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>darin@apple.com, fpizlo@apple.com, utatane.tea@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Per <a href="http://www.ecma-international.org/ecma-262/6.0/#sec-promise-executor">http://www.ecma-international.org/ecma-262/6.0/#sec-promise-executor</a> step 1 - if `newTarget` is undefined, a TypeError should be thrown.
Even if `new.target` isn't yet implemented, this can be 99% fixed with the equivalent of the line `if (!(this instanceof Promise)) { throw new TypeError(this + ' is not a Promise'); }`. If there's internal slots you can check, checking those would be cross-realm-safe as well.
This is the sole Promise violation the es6-shim is currently aware of in Safari 9/WebKit Nightly, and when this is fixed, es6-shim won't have to patch it at all.</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>