string.c: term fill

* string.c (rb_str_sub_bang): fill wchar terminator.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/string.c b/string.c
index 49e3c18152..2fb67efe92 100644
--- a/string.c
+++ b/string.c
@@ -4158,7 +4158,7 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
 	memcpy(p + beg0, rp, rlen);
 	len += rlen - plen;
 	STR_SET_LEN(str, len);
-	RSTRING_PTR(str)[len] = '\0';
+	TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str));
 	ENC_CODERANGE_SET(str, cr);
 	if (tainted) OBJ_TAINT(str);