From 0e25448a2057e325e7dbd8a9b861dfd93f3a1bd4 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 31 Dec 2022 19:45:16 +0900
Subject: [PATCH] mruby-io/io.c (io_check_readable): hide internal method in
 backtraces

---
 mrbgems/mruby-io/src/io.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 9add9be3a..d4d268350 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -813,6 +813,7 @@ io_get_read_fptr(mrb_state *mrb, mrb_value self)
 static mrb_value
 io_check_readable(mrb_state *mrb, mrb_value self)
 {
+  mrb->c->ci->mid = 0;
   io_get_read_fptr(mrb, self);
   return mrb_nil_value();
 }