<p>Because of</p>
<blockquote>
<p>(so this is a race condition though I'm not 100% clear how this happens, since both operations are supposed to run in the <code>gnrc_ipv6</code> thread)</p>
</blockquote>
<p>I might have opened this PR prematurely.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/RIOT-OS/RIOT/pull/10975#issuecomment-461851444">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AEn7YK37MvNJjGVBZnuPzxBIUJhCsJlQks5vLZ9pgaJpZM4awWHA">mute the thread</a>.<img src="https://github.com/notifications/beacon/AEn7YB0sj4V-JEzHWrVBzDj_MMFR-c0Hks5vLZ9pgaJpZM4awWHA.gif" height="1" width="1" alt="" /></p>
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