Amphtml: Validator fails on boilerplate code copied from guide.

[dikmax]

I've added boilerplate code. It's the same in all guides, but validator fails, despite code is identical.

You can check it here: https://dikmax.name/post/satrip-2015-iguazu-falls/amp/#development=1.

Errors:

https://dikmax.name/post/satrip-2015-iguazu-falls/amp/:1:1444 The tag 'head > style : boilerplate - old variant' is deprecated - use 'head > style : boilerplate' instead. (see https://www.ampproject.org/docs/reference/spec.html#required-markup)
validator.js:384 https://dikmax.name/post/satrip-2015-iguazu-falls/amp/:1:1444 The mandatory text (CDATA) inside tag 'head > style : boilerplate - old variant' is missing or incorrect. (see https://www.ampproject.org/docs/reference/spec.html#required-markup)

But if you open page source and search for <style amp-boilerplate>... copied from guides, then you'll find it byte to byte.

AMP version 1458844805881

[Gregable]

Your boilerplate is correct. The validator is correct as well, but the error message is a bit confusing. The error it is complaining about is the <style> tag you have on the page rather than the <style amp-boilerplate> tag.

The position at line 1, col 1444 points directly at that <style> tag, which must have the amp-custom attr. See https://github.com/ampproject/amphtml/blob/master/spec/amp-html-format.md#author-stylesheets

[chriswheeler]

I've just come across this Issue after some confusion too. The error specifically mentions head > style : boilerplate - old variant when it isn't referring to the boilerplate style element at all. The real error is that a style element is being used without either amp-boilerplate or amp-custom attribute.

[Gregable]

@chriswheeler , #4421 is probably the right bug to track this. Since it's taken us longer than I originally anticipated to retire the old boilerplate, it may be worth spending some effort to improve these errors.

[tannerbaum]

Don't know what the status of this is, but I want to thank @chriswheeler because I have been getting this error as a result of my custom style tag. I am building my amp articles through rendering React components, and React will strip away custom attributes that don't end with a ="".

So while I was diff checking and scratching my head up above on the amp-boilerplate, I had missed <style amp-custom>

Would be great if the error message could improve.

[SamDarbonne]

This is definitely a confusingly worded error message, just changing the wording would ease a lot of frustration from people trying to figure this out.