[rubygems/rubygems] Improve error message in frozen mode edge case

When a top level dependency is missing from the lockfile, and we're in
frozen mode, we should also print a "frozen error".

https://github.com/rubygems/rubygems/commit/3e82b835e3

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 5db59efe03..268f424928 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -677,10 +677,14 @@ module Bundler
       if missing.any?
         @locked_specs.delete(missing)
 
-        missing.first.name
-      else
-        false
+        return missing.first.name
       end
+
+      return if @dependency_changes
+
+      current_dependencies.find do |d|
+        @locked_specs[d.name].empty?
+      end&.name
     end
 
     def converge_paths