merge revision(s) 636d4f7: [Backport #17822]

	Avoid setting the visibility of refinement method entries

	Since refinement search is always performed, these entries should always
	be public. The method entry that the refinement search returns decides
	the visibility.

	Fixes [Bug #17822]
	---
	 test/ruby/test_refinement.rb | 22 ++++++++++++++++++++++
	 vm_method.c                  | 15 ++++++++++-----
	 2 files changed, 32 insertions(+), 5 deletions(-)

test/ruby/test_refinement.rb

@@ -2537,6 +2537,28 @@ def test_redefining_refined_for_prepended_class
     assert_equal(:second, klass.new.foo)
   end
 
+  class Bug17822
+    module Ext
+      refine(Bug17822) do
+        def foo = :refined
+      end
+    end
+
+    private(def foo = :not_refined)
+
+    module Client
+      using Ext
+      def self.call_foo
+        Bug17822.new.foo
+      end
+    end
+  end
+
+  # [Bug #17822]
+  def test_privatizing_refined_method
+    assert_equal(:refined, Bug17822::Client.call_foo)
+  end
+
   private
 
   def eval_using(mod, s)

version.h

@@ -12,7 +12,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 2
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 92
+#define RUBY_PATCHLEVEL 93
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 5

vm_method.c

@@ -1401,11 +1401,16 @@ rb_export_method(VALUE klass, ID name, rb_method_visibility_t visi)
 	rb_vm_check_redefinition_opt_method(me, klass);
 
 	if (klass == defined_class || origin_class == defined_class) {
-	    METHOD_ENTRY_VISI_SET(me, visi);
-
-	    if (me->def->type == VM_METHOD_TYPE_REFINED && me->def->body.refined.orig_me) {
-		METHOD_ENTRY_VISI_SET((rb_method_entry_t *)me->def->body.refined.orig_me, visi);
-	    }
+            if (me->def->type == VM_METHOD_TYPE_REFINED) {
+                // Refinement method entries should always be public because the refinement
+                // search is always performed.
+                if (me->def->body.refined.orig_me) {
+                    METHOD_ENTRY_VISI_SET((rb_method_entry_t *)me->def->body.refined.orig_me, visi);
+                }
+            }
+            else {
+                METHOD_ENTRY_VISI_SET(me, visi);
+            }
             rb_clear_method_cache(klass, name);
 	}
 	else {