merge revision(s) a4dff09: [Backport #21265]

	[PATCH] [Bug #21673] Fix resolving refined module-defined method

	A method defined in a module has no `defined_class`, use the ICLASS
	for it as the `defined_class`.

Author: k0kubun

test/ruby/test_refinement.rb

@@ -2712,6 +2712,18 @@ def test
     INPUT
   end
 
+  def test_refined_module_method
+    m = Module.new {
+      x = Module.new {def qux;end}
+      refine(x) {def qux;end}
+      break x
+    }
+    extend m
+    meth = method(:qux)
+    assert_equal m, meth.owner
+    assert_equal :qux, meth.name
+  end
+
   def test_symbol_proc_from_using_scope
     # assert_separately to contain the side effects of refining Kernel
     assert_separately([], <<~RUBY)

version.h

@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 7
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 65
+#define RUBY_PATCHLEVEL 66
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"

vm_method.c

@@ -1638,7 +1638,12 @@ resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, VALUE *de
 
         tmp_me = me->def->body.refined.orig_me;
         if (tmp_me) {
-            if (defined_class_ptr) *defined_class_ptr = tmp_me->defined_class;
+            if (!tmp_me->defined_class) {
+                VM_ASSERT_TYPE(tmp_me->owner, T_MODULE);
+            }
+            else if (defined_class_ptr) {
+                *defined_class_ptr = tmp_me->defined_class;
+            }
             return tmp_me;
         }