<h2 dir="auto">Returns an error</h2>
<p dir="auto">Hope to repair it as soon as possible, thank you. Point a praise</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/20368037/50500024-42431280-0a89-11e9-8fbd-21f7295b8884.png"><img src="https://user-images.githubusercontent.com/20368037/50500024-42431280-0a89-11e9-8fbd-21f7295b8884.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">EDIT (<a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/nicolo-ribaudo/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/nicolo-ribaudo">@nicolo-ribaudo</a>): We have identifier the issue and reported it upstream (<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="394948254" data-permission-text="Title is private" data-url="https://github.com/mjackson/unpkg/issues/162" data-hovercard-type="issue" data-hovercard-url="/mjackson/unpkg/issues/162/hovercard" href="https://github.com/mjackson/unpkg/issues/162">mjackson/unpkg#162</a>). If you are affected, please give a 👍 to that issue and, if requested, give any information that could help fixing it!</p>
<p dir="auto">Note: Different people are affected but not everyone, and part of the discussion is at <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="383761856" data-permission-text="Title is private" data-url="https://github.com/babel/website/issues/1901" data-hovercard-type="issue" data-hovercard-url="/babel/website/issues/1901/hovercard" href="https://github.com/babel/website/issues/1901">#1901</a>.</p>
<hr>
<p dir="auto">Original issue submitted by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/renyuns/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/renyuns">@renyuns</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="393377639" data-permission-text="Title is private" data-url="https://github.com/babel/babel/issues/9223" data-hovercard-type="issue" data-hovercard-url="/babel/babel/issues/9223/hovercard" href="https://github.com/babel/babel/issues/9223">babel/babel#9223</a></p>
<h2 dir="auto">Bug Report</h2>
<p dir="auto"><strong>Current Behavior</strong><br>
A clear and concise description of the behavior.<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/22095724/50334333-eafde900-0542-11e9-9aa3-9cdb5d009b3d.png"><img src="https://user-images.githubusercontent.com/22095724/50334333-eafde900-0542-11e9-9aa3-9cdb5d009b3d.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto"><strong>Input Code</strong></p>
<ul dir="auto">
<li>REPL or Repo link if applicable:</li>
</ul>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="var your =&gt; (code) =&gt; here;"><pre class="notranslate"><span class="pl-k">var</span> <span class="pl-s1">your</span> <span class="pl-c1">=&gt;</span> <span class="pl-kos">(</span><span class="pl-s1">code</span><span class="pl-kos">)</span> <span class="pl-c1">=&gt;</span> <span class="pl-s1">here</span><span class="pl-kos">;</span></pre></div>
<p dir="auto"><strong>Expected behavior/code</strong><br>
A clear and concise description of what you expected to happen (or code).</p>
<p dir="auto"><strong>Babel Configuration (.babelrc, package.json, cli command)</strong></p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="{
  &quot;your&quot;: { &quot;config&quot;: &quot;here&quot; }
}"><pre class="notranslate"><span class="pl-kos">{</span>
  <span class="pl-s">"your"</span>: <span class="pl-kos">{</span> <span class="pl-s">"config"</span>: <span class="pl-s">"here"</span> <span class="pl-kos">}</span>
<span class="pl-kos">}</span></pre></div>
<p dir="auto"><strong>Environment</strong></p>
<ul dir="auto">
<li>Babel version(s): [e.g. v6.0.0, v7.0.0-beta.34]</li>
<li>Node/npm version: [e.g. Node 8/npm 5]</li>
<li>OS: [e.g. OSX 10.13.4, Windows 10]</li>
<li>Monorepo: [e.g. yes/no/Lerna]</li>
<li>How you are using Babel: [e.g. <code class="notranslate">cli</code>, <code class="notranslate">register</code>, <code class="notranslate">loader</code>]</li>
</ul>
<p dir="auto"><strong>Possible Solution</strong></p>

<p dir="auto"><strong>Additional context/Screenshots</strong><br>
Add any other context about the problem here. If applicable, add screenshots to help explain.</p>