From 08eafe21d305e17c41b0221cae22dc1e90bee9cf Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 4 Oct 2019 14:42:01 +0900
Subject: Implement Ruby2.7's frozen strings from `Symbol#to_s`.

---
 src/class.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/class.c')

diff --git a/src/class.c b/src/class.c
index 745e0a72c..9803e7662 100644
--- a/src/class.c
+++ b/src/class.c
@@ -72,6 +72,7 @@ mrb_class_name_class(mrb_state *mrb, struct RClass *outer, struct RClass *c, mrb
       }
       return;
     }
+    name = mrb_str_dup(mrb, name);
     mrb_str_cat_cstr(mrb, name, "::");
     mrb_str_cat_cstr(mrb, name, mrb_sym_name(mrb, id));
   }
-- 
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