From 57329481086a761c599d1e5dfe05954b396e9a91 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 29 Dec 2022 14:33:08 +0900
Subject: [PATCH] mruby-io/io.c (io_init): check `opt` if it's a hash

But `opt` will be ignored anyway in mruby.
---
 mrbgems/mruby-io/src/io.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 8902e6c41..7c5aec987 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -689,12 +689,12 @@ io_init(mrb_state *mrb, mrb_value io)
 {
   struct mrb_io *fptr;
   mrb_int fd;
-  mrb_value mode, opt;
+  mrb_value mode, opt;          /* opt (Hash) will be ignored */
   int flags;
 
   mode = opt = mrb_nil_value();
 
-  mrb_get_args(mrb, "i|oo", &fd, &mode, &opt);
+  mrb_get_args(mrb, "i|oH", &fd, &mode, &opt);
   switch (fd) {
     case 0: /* STDIN_FILENO */
     case 1: /* STDOUT_FILENO */