From 84a4d340a6eaafed257548a0d2426c8facb711dd Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sun, 26 Feb 2023 18:40:45 +0900
Subject: [PATCH] mruby-io/file.c (_mtime): return nil instead of false

As a Ruby convention, a method should return nil (not false) for the
exceptional value, e.g. String#index. File#_mtime should follow the
convention too.
---
 mrbgems/mruby-io/src/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mrbgems/mruby-io/src/file.c b/mrbgems/mruby-io/src/file.c
index e0957ffa6..6505f9800 100644
--- a/mrbgems/mruby-io/src/file.c
+++ b/mrbgems/mruby-io/src/file.c
@@ -398,7 +398,7 @@ mrb_file_mtime(mrb_state *mrb, mrb_value self)
   mrb_stat st;
 
   if (mrb_fstat(fd, &st) == -1)
-    return mrb_false_value();
+    return mrb_nil_value();
   return mrb_int_value(mrb, (mrb_int)st.st_mtime);
 }