Asset generator flag value missing

[jcoyne]

In rails 7, on the release-7.x branch of blacklight I see this error:

    generate  blacklight:assets
       rails  generate blacklight:assets
     gemfile  bootstrap (~> 4.0)
     gemfile  twitter-typeahead-rails (0.11.1.pre.corejavascript)
     gemfile  sassc-rails (~> 2.1)
      create  app/assets/javascripts/application.js
      create  app/assets/stylesheets/blacklight.scss
     gemfile  jquery-rails
      insert  app/assets/javascripts/application.js
File unchanged! The supplied flag value not found!  app/assets/javascripts/application.js

[thatbudakguy]

is this #2532? seems it's been around awhile