<p>Replacing</p>
<pre><code> res << GD2::AnimatedGif.gif_anim_add(frames[n], frames[n - 1], delay)
</code></pre>
<p>by</p>
<pre><code> res << GD2::AnimatedGif.gif_anim_add(frames[n], frames[n - 1], delay) unless frames[n] == frames[n - 1]
</code></pre>
<p>lets the unit tests pass. For whatever reason gif_anim_add isn't happy with two identical images in a row. This feels a bit like a hack, and I don't know yet what is caused this behavior.</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/openstreetmap/openstreetmap-website/issues/2132#issuecomment-479441585">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABWnLbh_9S19T1sGnVKs5xAhJdmR0omUks5vdInLgaJpZM4ak6Cd">mute the thread</a>.<img src="https://github.com/notifications/beacon/ABWnLTZYMMlGCz0gFixJEVcUo_qibC8Eks5vdInLgaJpZM4ak6Cd.gif" height="1" width="1" alt="" /></p>
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