From 552728a23aeab0df598b356b19a573259e297d14 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 23 Sep 2021 00:04:14 +0900
Subject: Check the encoding of `ruby2_keywords_flag` [Bug #18184]

---
 marshal.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'marshal.c')

diff --git a/marshal.c b/marshal.c
index 47b13bc684..ab0e63c701 100644
--- a/marshal.c
+++ b/marshal.c
@@ -1422,6 +1422,7 @@ ruby2_keywords_flag_check(VALUE sym)
 {
     const char *p;
     long l;
+    if (rb_enc_get_index(sym) != ENCINDEX_US_ASCII) return 0;
     RSTRING_GETMEM(sym, p, l);
     if (l <= 0) return 0;
     if (name_equal(name_s_ruby2_keywords_flag, rb_strlen_lit(name_s_ruby2_keywords_flag), p, l)) {
-- 
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