<p></p>
<p><b>@JKRhb</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/16228#discussion_r685398547">sys/net/application_layer/dhcpv6/client.c</a>:</p>
<pre style='color:#555'>>  {
     assert(IS_USED(MODULE_DHCPV6_CLIENT_IA_NA));
     if (!IS_USED(MODULE_DHCPV6_CLIENT_IA_NA)) {
         LOG_WARNING("DHCPv6 client: Unable to request IA_NA as module "
                     "`dhcpv6_client_ia_na` is not used\n");
-        return;
+        return 0; /* TODO: Is this the right return value? */
</pre>
<p>Thank you! I added this in <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/RIOT-OS/RIOT/commit/50ab3b1bb880827ab7f9e41746c0a9e60c895b63/hovercard" href="https://github.com/RIOT-OS/RIOT/commit/50ab3b1bb880827ab7f9e41746c0a9e60c895b63"><tt>50ab3b1</tt></a></p>

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