[rubygems/rubygems] make Bundler.load_marshal private

https://github.com/rubygems/rubygems/commit/4909d071d2

lib/bundler.rb

@@ -525,12 +525,6 @@ EOF
       load_marshal(data, :marshal_proc => SAFE_MARSHAL_PROC)
     end
 
-    def load_marshal(data, marshal_proc: nil)
-      Marshal.load(data, marshal_proc)
-    rescue TypeError => e
-      raise MarshalError, "#{e.class}: #{e.message}"
-    end
-
     def load_gemspec(file, validate = false)
       @gemspec_cache ||= {}
       key = File.expand_path(file)
@@ -619,6 +613,12 @@ EOF
 
     private
 
+    def load_marshal(data, marshal_proc: nil)
+      Marshal.load(data, marshal_proc)
+    rescue TypeError => e
+      raise MarshalError, "#{e.class}: #{e.message}"
+    end
+
     def eval_yaml_gemspec(path, contents)
       Kernel.require "psych"
 

spec/bundler/bundler/bundler_spec.rb

@@ -5,9 +5,9 @@ require "tmpdir"
 
 RSpec.describe Bundler do
   describe "#load_marshal" do
-    it "loads any data" do
+    it "is a private method and raises an error" do
       data = Marshal.dump(Bundler)
-      expect(Bundler.load_marshal(data)).to eq(Bundler)
+      expect { Bundler.load_marshal(data) }.to raise_error(NoMethodError, /private method `load_marshal' called/)
     end
   end