strscan dependency/version

[gdonald]

Issue report

Question 1: What is the problem?

• What is the expected behavior?

I expect my Rails app to run, like it has for years.

• What is the actual behavior?

My Rails app does not run.

• How can we reproduce it?

I upgraded (compiled from source) my Ruby from 2.7.4 to 2.7.5. I recompiled Passenger. I restarted Apache. I then get this error in the logs:

[ E 2022-01-12 00:39:03.6423 100375/T2p age/Cor/App/Implementation.cpp:221 ]: Could not spawn process for
application /path/to/my/rails/app/current: The application encountered the following error: You have already
activated strscan 1.0.3, but your Gemfile requires strscan 3.0.1. Since strscan is a default gem, you can either
remove your dependency on it or try updating to a newer version of bundler that supports strscan as a default
gem (Gem::LoadError)

Question 2: Passenger version and integration mode:

Both 6.0.10 and 6.0.12 produce the same error for me.

Question 3: OS or Linux distro, platform (including version):

Debian 10, Apache 2.4.51

Question 4: Passenger installation method:

source tarball

Question 5: Your app's programming language (including any version managers) and framework (including versions):

Rails 6.1.4, Ruby 2.7.5

Question 6: Are you using a PaaS and/or containerization? If so which one?

No.

Question 7: Anything else about your setup that we should know?

Ruby 2.7.4 works fine for me.

[minivdweek]

I can confirm that this also happens when upgrading actionmailer to 7.0.1 when using Ruby 2.7.4, since actionmailer has a dependency on strscan as well (which is then included in the lockfile at the most recent version, 3.0.1).

As a workaround, locking the strscan version to 1.0.3 in your Gemfile until you upgrade Ruby to >=3 (which includes strscan 3.0.1 by default) will fix the issue. Or upgrade Ruby to >=3, if that's possible for you.

This issue feels like it may be either closely related to or caused by #2409

[gdonald]

I can confirm, locking the strscan version to 1.0.3 in my Gemfile works. Thanks @minivdweek.

[CamJN]

fixed, see: #2409