<p dir="auto">TestDualStackUDPListener still fails on Dragonfly sometimes.</p>
<p dir="auto">From <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/golang/go/commit/f6d1009431c4d4677a292be5a78f57c239929d4b/hovercard" href="https://github.com/golang/go/commit/f6d1009431c4d4677a292be5a78f57c239929d4b"><tt>f6d1009</tt></a></p>
<p dir="auto"><a href="http://build.golang.org/log/f4bc3bb1b42e2afb646e754f6f2d36ec6a665daf" rel="nofollow">http://build.golang.org/log/f4bc3bb1b42e2afb646e754f6f2d36ec6a665daf</a></p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="--- FAIL: TestDualStackUDPListener (0.02s)
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp 0.0.0.0 test
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp 0.0.0.0 test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp ::ffff:0.0.0.0 test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp4  test
    listen_test.go:319: skipping udp6  test
    listen_test.go:319: skipping udp4 0.0.0.0 test
    listen_test.go:319: skipping udp6 :: test
    listen_test.go:357: listen udp4 127.0.0.1:50813: bind: address already in use
FAIL
FAIL    net 8.282s"><pre class="notranslate"><code class="notranslate">--- FAIL: TestDualStackUDPListener (0.02s)
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp 0.0.0.0 test
    listen_test.go:319: skipping udp  test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp 0.0.0.0 test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp ::ffff:0.0.0.0 test
    listen_test.go:319: skipping udp :: test
    listen_test.go:319: skipping udp4  test
    listen_test.go:319: skipping udp6  test
    listen_test.go:319: skipping udp4 0.0.0.0 test
    listen_test.go:319: skipping udp6 :: test
    listen_test.go:357: listen udp4 127.0.0.1:50813: bind: address already in use
FAIL
FAIL    net 8.282s
</code></pre></div>
<p dir="auto">Not sure the version of dragonfly builder but the root cause of test flakiness comes from the kernel changes like the following:<br>
<a href="http://gitweb.dragonflybsd.org/dragonfly.git/commit/727ccde8cce813911d885b7f6ed749dcea68a886" rel="nofollow">http://gitweb.dragonflybsd.org/dragonfly.git/commit/727ccde8cce813911d885b7f6ed749dcea68a886</a></p>
<p dir="auto">Simply dragonfly is dropping support for ipv6 ipv4-mapped address for some reason.</p>