Continuing after fixing #6732 , I'm seeing an issue when testing on Windows, using jruby-head and ffi, namely, there's a conflict between a "loose" dependency, and what jruby perceives as the default gem version.

The dependency is set like:

# in gemspec
spec.add_dependency "ffi", ["~> 1.12"]

The error message is:

Gem::LoadError: You have already activated ffi 1.15.1, but your Gemfile requires ffi 1.15.3. Since ffi is a default gem, you can either remove your dependency on it or try updating to a newer version of bundler that supports ffi as a default gem.

Build log here: https://github.com/HoneyryderChuck/idnx/runs/3044772603?check_suite_focus=true

It's worth noting that this issue happens only on windows (if you run through the other jruby jobs, on mac and linux, all is well).

Is the change a plain bundler update, or is it more involved?

Environment Information

Provide at least:

• JRuby version: 9.3 (head)
• Operating system and platform: Windows (Github actions CI)