<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylkk1PwzAMhn9NeolWpWm7kUMOA7QjElyQuKC08dqwrNnysbF_j9Mhwbgi5ct28vqxnM7pi7T2tCf1GscLDPBJ42imXaCEcxX0lvANOrx-PygfL2hlZw5S7SBMhK8i3avYj7QkfH17lfA7UuNadc6baQjBEi7yNXxO-APtUsRscKFhdMnqqw5y0DHGQ8hMWWPjM1bFqrJ3-2zivOijPz_joSq0rLWohSpUiqPz8g2OSU2vqUjeyluhwcQxdd8yc9nXbXHw7gP6iKYJIUHAQ1uztipG2Qmx1Zi8bZnum5VYCb1kzbIVjPWqaVRhVQc2SNLeY1UTnOkskStsH4v_ExjJGeesYstKIAQvVbPV0C5XrEZXVXPSMNgrY8usUzo_FH5u6aJLQ8CgNSGGn6AKwQwTwAyMhNFEC_IJBhXNCah1bqdGUPpXe8_O76iZ6J-PUsykcsb8AkT6uY8>53051</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Negative lookahead doesn't work in llvm::Regex
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          ZequanWu
      </td>
    </tr>
</table>

<pre>
    llvm::Regex thinks "asdf/third_party/asdf " doesn't match .*third_party/(?!boringssl).*", but they should match: https://regex101.com/r/ydqrwQ/1
</pre>
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