1 files changed, 9 insertions, 1 deletions
@@ -62,9 +62,13 @@ bug_str_unterminated_substring(VALUE str, VALUE vbeg, VALUE vlen)
 if (RSTRING_LEN(str) < beg + len) rb_raise(rb_eIndexError, "end: %ld", beg + len);
 str = rb_str_new_shared(str);
 if (STR_EMBED_P(str)) {
 RSTRING(str)->basic.flags &= ~RSTRING_EMBED_LEN_MASK;
 RSTRING(str)->basic.flags |= len << RSTRING_EMBED_LEN_SHIFT;
-	memmove(RSTRING(str)->as.ary, RSTRING(str)->as.ary + beg, len);
 }
 else {
 RSTRING(str)->as.heap.ptr += beg;
@@ -112,7 +116,11 @@ bug_str_s_cstr_noembed(VALUE self, VALUE str)
 Check_Type(str, T_STRING);
 FL_SET((str2), STR_NOEMBED);
 memcpy(buf, RSTRING_PTR(str), capacity);
 RBASIC(str2)->flags &= ~RSTRING_EMBED_LEN_MASK;
 RSTRING(str2)->as.heap.aux.capa = capacity;
 RSTRING(str2)->as.heap.ptr = buf;
 RSTRING(str2)->as.heap.len = RSTRING_LEN(str);