[rubygems/rubygems] Fix bundle check exit code when git gem is missing

Make `bundle check` exit with code 1 when gem git source is not yet
checked out.

https://github.com/rubygems/rubygems/commit/93162bf5af

lib/bundler/cli/check.rb

@@ -17,7 +17,7 @@ module Bundler
       begin
         definition.resolve_only_locally!
         not_installed = definition.missing_specs
-      rescue GemNotFound, SolveFailure
+      rescue GemNotFound, GitError, SolveFailure
         Bundler.ui.error "Bundler can't satisfy your Gemfile's dependencies."
         Bundler.ui.warn "Install missing gems with `bundle install`."
         exit 1

spec/bundler/commands/check_spec.rb

@@ -70,6 +70,17 @@ RSpec.describe "bundle check" do
     expect(err).to include("Bundler can't satisfy your Gemfile's dependencies.")
   end
 
+  it "prints a generic error if gem git source is not checked out" do
+    gemfile <<-G
+      source "https://gem.repo1"
+      gem "rails", git: "git@github.com:rails/rails.git"
+    G
+
+    bundle :check, raise_on_error: false
+    expect(exitstatus).to eq 1
+    expect(err).to include("Bundler can't satisfy your Gemfile's dependencies.")
+  end
+
   it "prints a generic message if you changed your lockfile" do
     build_repo2 do
       build_gem "rails_pinned_to_old_activesupport" do |s|