o 100 because auto min size is 100
      -->
      <div style="flex: 0 0 50px; width: 200px;">
        <div></div>
      </div>
      <!-- contribution: 50px
      starts as max(specified=50, min-content=100) = 100
      clamped down to 50 because doesn't grow
      auto min size is 50, so has no effect
      -->
      <div style="flex: 0 0 50px; width: 50px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="200">
      