From 70b53f91c258e23fc5d68dd8f9c7cf5b8e0290f6 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sun, 11 Aug 2019 21:53:23 +0900
Subject: Add `NUL` always to short strings; ref 98fc887

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

(limited to 'src/string.c')

diff --git a/src/string.c b/src/string.c
index daf293368..0abc07000 100644
--- a/src/string.c
+++ b/src/string.c
@@ -594,6 +594,7 @@ str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2)
     RSTR_SET_EMBED_FLAG(s1);
     memcpy(s1->as.ary, RSTR_PTR(s2), len);
     RSTR_SET_EMBED_LEN(s1, len);
+    RSTR_PTR(s1)[len] = '\0';
   }
   else {
     str_make_shared(mrb, s2, s1);
-- 
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