https://git.ruby-lang.org/ruby.git/commit/?id=aa7a020710

From aa7a02071072b5b0dd15357740d0ffd506bb0381 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Sat, 19 Dec 2020 03:20:09 +0900
Subject: Revert "Revert "Use rb_id_attrset without intermediate strings""

This reverts commit 41c208d4a463183fddca250026e5f1cd759d2604.

Reintroduce 66090b9d10cdaed917b525225e59d1c19e399248.

diff --git a/object.c b/object.c
index 49729f6..b50a3b9 100644
--- a/object.c
+++ b/object.c
@@ -2332,7 +2332,7 @@ rb_mod_attr_writer(int argc, VALUE *argv, VALUE klass) https://github.com/ruby/ruby/blob/trunk/object.c#L2332
     for (i=0; i<argc; i++) {
 	ID id = id_for_attr(klass, argv[i]);
 	rb_attr(klass, id, FALSE, TRUE, TRUE);
-	rb_ary_push(names, rb_str_intern(rb_sprintf("%"PRIsVALUE"=", ID2SYM(id))));
+	rb_ary_push(names, ID2SYM(rb_id_attrset(id)));
     }
     return names;
 }
@@ -2363,11 +2363,10 @@ rb_mod_attr_accessor(int argc, VALUE *argv, VALUE klass) https://github.com/ruby/ruby/blob/trunk/object.c#L2363
 
     for (i=0; i<argc; i++) {
 	ID id = id_for_attr(klass, argv[i]);
-	VALUE idv = ID2SYM(id);
 
 	rb_attr(klass, id, TRUE, TRUE, TRUE);
-	rb_ary_push(names, idv);
-	rb_ary_push(names, rb_str_intern(rb_sprintf("%"PRIsVALUE"=", idv)));
+	rb_ary_push(names, ID2SYM(id));
+	rb_ary_push(names, ID2SYM(rb_id_attrset(id)));
     }
     return names;
 }
-- 
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