From 8f4a929e1a01c8d6176fb53a9ef5dff6de632959 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Sat, 11 Feb 2017 16:27:07 +0900
Subject: String#replace should update s->flags for MRB_STR_NO_UTF.

Otherwise String#size may return wrong length; fix #3448
---
 src/string.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/string.c')

diff --git a/src/string.c b/src/string.c
index 5e37abee1..abe8ad865 100644
--- a/src/string.c
+++ b/src/string.c
@@ -519,6 +519,8 @@ str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2)
   long len;
 
   check_frozen(mrb, s1);
+  s1->flags &= ~MRB_STR_NO_UTF;
+  s1->flags |= s2->flags&MRB_STR_NO_UTF;
   if (s1 == s2) return mrb_obj_value(s1);
   len = RSTR_LEN(s2);
   if (RSTR_SHARED_P(s1)) {
-- 
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