The (defined?(@source) && @source) || Gem::Source::Installed.new does not go away investigate it

[ElvisDot]

I thought that was a one time issue and new batches will not have it. But it keeps coming up. Investigate what the root cause is. And maybe let the doctor update the bundler at all times? Or just with the --fix flag.

gem update --system
bundle update --bundler

Should only be run if bundler --version is too old (matching a known good version by the doctor) otherwise it slows down the doctor on a healthy system.

[ElvisDot]

This is non trivial to solve. The rubygems version shipped by rbenv together with ruby 3.1.2 is old so it might throw this error. Updating to the latest version now causes a version difference between herokus rubygems versions and the local version which can cause Gemfile issues during deploy.