Eager loading problem in version 2.1.5 (also in classic autoloader)

[brian-kephart]

I have a few apps using Camaleon CMS, which is a Rails engine. When I tried to upgrade from Rails 5.2.3 to 6.0.0rc1, eager loading broke and the app won't boot with it turned on.

I realize this could be seen as an issue with Camaleon, but there appears to be a regression from 2.1.4 to 2.1.5.

I also was under the impression that setting the autoloader to :classic should preserve pre-6.0 behavior, but that is not the case as things that load fine in 5.2 do not load correctly in classic mode.

Symptoms:

• not working with Zeitwerk 2.1.5
• not working with config.autoloader = :classic
• working with Zeitwerk 2.1.4 (non-classic mode only)

Repro here: https://github.com/brian-kephart/zeitwerk_issue. Steps:

• git clone https://github.com/brian-kephart/zeitwerk_issue.git
• bundle
• rails s (app should boot)
• comment out the zeitwerk entry in the Gemfile and bundle update zeitwerk, or uncomment config.autoloader = :classic in application.rb, and the app will no longer boot.

[fxn]

The engine does not comply with the requirements of :zeitwerk mode. As it is, you have to run your application in :classic mode. Have explained it in this issue.

Regarding :classic mode, the error you get is not related to autoloading, I have explained it in this other issue.

[brian-kephart]

Thanks for the response, and for filing the issue. The multiple problems made things confusing, so thanks for clearing it up.