Error in Rails Guides? (Asset Pipeline: tag helpers' debug option)

[rlue]

From Section 3.3 of the Edge Guides on the Asset Pipeline:

Debug mode can also be enabled in Rails helper methods:

<%= stylesheet_link_tag "application", debug: true %>
<%= javascript_include_tag "application", debug: true %>

The :debug option is redundant if debug mode is already on.

When I try this in Rails 5.1, it simply adds a debug="true" HTML attribute to the corresponding tag, rather than enabling debug mode on the specified tag helper. Furthermore, the Edge API documentation makes no mention of a debug option.

I've also looked into the source for the javascript_include_tag method as far back as it goes in the repo (4.1-stable), and I see no mention of such an option.

Am I missing something, or is this information incorrect? If so, would the team accept a PR amending this portion of the guides?

[georgeclaghorn]

The debug option is (supposed to be) implemented in sprockets-rails. Do you not use Sprockets in your app?

[rlue]

Thanks! This was a bug in sprockets-rails; I've submitted a PR for it.