[css-flexbox] Does the automatic min size ignore content flex-basis in the inline axis but not in the block axis?

[Loirooriol]

Consider this case:

<div style="display: inline-flex; flex-direction: column; border: solid orange">
  <div style="flex-basis: 0px; display: flex; flex-direction: column; border: solid cyan;">
    <div style="flex: 0 0 100px; border: solid fuchsia">foo</div>
    <div style="flex: 0 0 100px; border: solid fuchsia">bar</div>
  </div>
</div>

The cyan element has flex-basis: 0, but Blink, WebKit and Gecko agree its inner height is 212px due to min-height: auto.

However, let's make the inline axis be the main axis:

<div style="display: inline-flex; flex-direction: row; border: solid orange">
  <div style="flex-basis: 0px; display: flex; flex-direction: row; border: solid cyan;">
    <div style="flex: 0 0 100px; border: solid fuchsia">foo</div>
    <div style="flex: 0 0 100px; border: solid fuchsia">bar</div>
  </div>
</div>

Now the inner width is the size of the texts "foo" + "bar" plus 12px.

So why does the automatic minimum size take the flex-basis of the contents into account in the block axis but not in the inline axis?
Is it a bug? I'm not seeing what part of the spec causes the asymmetry.

[bfgeek]

This is the "default" intrinsic-size algorithm broken for flexbox at the moment.

This is what this looks like with our new --enable-blink-features=NewFlexboxSizing flag (@davidsgrogan - for some reason we aren't including borders yet FYI):

[Loirooriol]

OK, thanks for the explanation.

[davidsgrogan]

Border issue was fixed in https://chromium-review.googlesource.com/c/chromium/src/+/3722487