(Wrong) fix for bundle lock edge case

bundler/lib/bundler/resolver/package.rb

@@ -18,10 +18,19 @@ class Package
       def initialize(name, platforms, locked_specs:, unlock:, prerelease: false, dependency: nil)
         @name = name
         @platforms = platforms
-        @locked_version = locked_specs[name].first&.version
         @unlock = unlock
-        @dependency = dependency || Dependency.new(name, @locked_version)
         @top_level = !dependency.nil?
+
+        locked_spec = locked_specs[name].first
+
+        if @top_level
+          @locked_version = locked_spec.version if locked_spec && dependency.matches_spec?(locked_spec)
+          @dependency = dependency
+        else
+          @locked_version = locked_spec&.version
+          @dependency = Dependency.new(name, @locked_version)
+        end
+
         @prerelease = @dependency.prerelease? || @locked_version&.prerelease? || prerelease ? :consider_first : :ignore
       end
 

bundler/spec/commands/lock_spec.rb

@@ -135,6 +135,42 @@
     expect(read_lockfile).to eq(@lockfile)
   end
 
+  it "writes a lockfile when there is an outdated lockfile and --patch is used with a specific dependency" do
+    build_repo4 do
+      build_gem "playbook_ui", "13.14.0"
+      build_gem "playbook_ui", "13.15.0"
+    end
+
+    gemfile <<-G
+      source "#{file_uri_for(gem_repo4)}"
+      gem "playbook_ui", "13.15.0"
+    G
+
+    original_lockfile = <<~L
+      GEM
+        remote: #{file_uri_for(gem_repo4)}/
+        specs:
+          playbook_ui (13.14.0)
+
+      PLATFORMS
+        arm64-darwin-23
+
+      DEPENDENCIES
+        playbook_ui (= 13.14.0)
+
+      BUNDLED WITH
+         #{Bundler::VERSION}
+    L
+
+    lockfile original_lockfile
+
+    simulate_platform "arm64-darwin-23" do
+      bundle "lock --update playbook_ui --patch --strict"
+    end
+
+    expect(read_lockfile).to eq(original_lockfile.gsub("13.14.0", "13.15.0"))
+  end
+
   it "does not fetch remote specs when using the --local option" do
     bundle "lock --update --local", raise_on_error: false