Validator says that layout="responsive" is not supported in amp-carousel when width an height are missing which is confusing

[sryze]

What's the issue?

The documentation for amp-carousel states that layout="responsive" is supported where carousel type is slides, but I'm getting an error when using this type of carousel:

The specified layout 'RESPONSIVE' is not supported by tag 'AMP-CAROUSEL [type=carousel]'. (see https://www.ampproject.org/docs/reference/components/amp-carousel)

How do we reproduce the issue?

<amp-carousel class="slides" type="slides" layout="responsive" controls loop>
</amp-carousel>

What browsers are affected?

Tested in Chrome, Firefox on macOS

Which AMP version is affected?

1903262220080

[aghassemi]

@sryze the message it confusing, the problem is you are missing width and height
<amp-carousel class="slides" type="slides" layout="responsive" width="300" height="150" controls loop > would work.

to @honeybadgerdontcare regarding the confusing error.

[honeybadgerdontcare]

We may be able to help the validator make a more informative error message with making the attribute type=slides a dispatch key for name/value/parent.

P3, will address when we can.