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<base href="https://bugs.webkit.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ES6 classes: super() should throw when extending null"
href="https://bugs.webkit.org/show_bug.cgi?id=144283">144283</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ES6 classes: super() should throw when extending null
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>528+ (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>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>arv@chromium.org
</td>
</tr></table>
<p>
<div>
<pre><a href="http://trac.webkit.org/browser/trunk/LayoutTests/js/script-tests/class-syntax-super.js#L59">http://trac.webkit.org/browser/trunk/LayoutTests/js/script-tests/class-syntax-super.js#L59</a>
shouldThrow('new (class extends null { constructor() { super(); return undefined } })', '"TypeError: undefined is not an object (evaluating \'super()\')"');
and
<a href="http://trac.webkit.org/browser/trunk/LayoutTests/js/script-tests/class-syntax-super.js#L64">http://trac.webkit.org/browser/trunk/LayoutTests/js/script-tests/class-syntax-super.js#L64</a>
shouldThrow('new (class extends null { constructor() { super() } })', '"TypeError: undefined is not an object (evaluating \'super()\')"');
The reason super() throws is because Function.prototype is not constructable. Your test seems to be testing the return value. It should never get there.</pre>
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