From 80b44c6ade483815868eccd0d0f543977e583503 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 22 Feb 2022 11:46:02 +0900
Subject: [PATCH] socket.c: avoid `mrb_funcall_id()` to retrieve file
 descriptor.

---
 mrbgems/mruby-socket/src/socket.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mrbgems/mruby-socket/src/socket.c b/mrbgems/mruby-socket/src/socket.c
index 9af143e2f..fd5967cf9 100644
--- a/mrbgems/mruby-socket/src/socket.c
+++ b/mrbgems/mruby-socket/src/socket.c
@@ -262,10 +262,12 @@ sa2addrlist(mrb_state *mrb, const struct sockaddr *sa, socklen_t salen)
   return ary;
 }
 
+int mrb_io_fileno(mrb_state *mrb, mrb_value io);
+
 static int
 socket_fd(mrb_state *mrb, mrb_value sock)
 {
-  return (int)mrb_as_int(mrb, mrb_funcall_id(mrb, sock, MRB_SYM(fileno), 0));
+  return mrb_io_fileno(mrb, sock);
 }
 
 static int