merge revision(s) 1cdae49d39fbaef654df487f168d1fb14a146d59: [Backport #17577]

	Implement NameError::message#clone for Ractor

	---
	 bootstraptest/test_ractor.rb   | 13 +++++++++++++
	 error.c                        | 35 +++++++++++++++++++++++++++++++++--
	 test/objspace/test_objspace.rb |  9 +++++++++
	 3 files changed, 55 insertions(+), 2 deletions(-)

1 files changed, 33 insertions, 2 deletions

diff --git a/error.c b/error.c
index 5e3e4e358b..5d8cb82b62 100644
--- a/error.c
+++ b/error.c
@@ -1847,9 +1847,9 @@ static const rb_data_type_t name_err_mesg_data_type = {
 
 /* :nodoc: */
 static VALUE
-rb_name_err_mesg_new(VALUE mesg, VALUE recv, VALUE method)
+rb_name_err_mesg_init(VALUE klass, VALUE mesg, VALUE recv, VALUE method)
 {
-    VALUE result = TypedData_Wrap_Struct(rb_cNameErrorMesg, &name_err_mesg_data_type, 0);
+    VALUE result = TypedData_Wrap_Struct(klass, &name_err_mesg_data_type, 0);
     VALUE *ptr = ALLOC_N(VALUE, NAME_ERR_MESG_COUNT);
 
     ptr[NAME_ERR_MESG__MESG] = mesg;
@@ -1861,6 +1861,35 @@ rb_name_err_mesg_new(VALUE mesg, VALUE recv, VALUE method)
 
 /* :nodoc: */
 static VALUE
+rb_name_err_mesg_new(VALUE mesg, VALUE recv, VALUE method)
+{
+    return rb_name_err_mesg_init(rb_cNameErrorMesg, mesg, recv, method);
+}
+
+/* :nodoc: */
+static VALUE
+name_err_mesg_alloc(VALUE klass)
+{
+    return rb_name_err_mesg_init(klass, Qnil, Qnil, Qnil);
+}
+
+/* :nodoc: */
+static VALUE
+name_err_mesg_init_copy(VALUE obj1, VALUE obj2)
+{
+    VALUE *ptr1, *ptr2;
+
+    if (obj1 == obj2) return obj1;
+    rb_obj_init_copy(obj1, obj2);
+
+    TypedData_Get_Struct(obj1, VALUE, &name_err_mesg_data_type, ptr1);
+    TypedData_Get_Struct(obj2, VALUE, &name_err_mesg_data_type, ptr2);
+    MEMCPY(ptr1, ptr2, VALUE, NAME_ERR_MESG_COUNT);
+    return obj1;
+}
+
+/* :nodoc: */
+static VALUE
 name_err_mesg_equal(VALUE obj1, VALUE obj2)
 {
     VALUE *ptr1, *ptr2;
@@ -2787,6 +2816,8 @@ Init_Exception(void)
     rb_define_method(rb_eNameError, "receiver", name_err_receiver, 0);
     rb_define_method(rb_eNameError, "local_variables", name_err_local_variables, 0);
     rb_cNameErrorMesg = rb_define_class_under(rb_eNameError, "message", rb_cObject);
+    rb_define_alloc_func(rb_cNameErrorMesg, name_err_mesg_alloc);
+    rb_define_method(rb_cNameErrorMesg, "initialize_copy", name_err_mesg_init_copy, 1);
     rb_define_method(rb_cNameErrorMesg, "==", name_err_mesg_equal, 1);
     rb_define_method(rb_cNameErrorMesg, "to_str", name_err_mesg_to_str, 0);
     rb_define_method(rb_cNameErrorMesg, "_dump", name_err_mesg_dump, 1);