NoMethodError: undefined method `to_gemfile' for #<Bundler::Source::Path:0x1240 source at `vendor/gems/diff_match_patch`>
I noticed that a JH validation pipeline had most of its jobs failing, e.g. https://gitlab.com/gitlab-org-sandbox/gitlab-jh-validation/-/jobs/5535406187#L55.
cc @mtan-gitlab