From 09723b98f7a8db4ce6d22cd282525275154736fe Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 10 Dec 2019 10:08:43 +0900
Subject: [ruby/io-console] Warn vtime option without intr flag

https://github.com/ruby/io-console/commit/499ff3de48
---
 ext/io/console/console.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ext/io/console/console.c b/ext/io/console/console.c
index e59284e434..626d8d703d 100644
--- a/ext/io/console/console.c
+++ b/ext/io/console/console.c
@@ -517,6 +517,9 @@ console_getch(int argc, VALUE *argv, VALUE io)
 	    if (w < 0) rb_eof_error();
 	    if (!(w & RB_WAITFD_IN)) return Qnil;
 	}
+	else {
+	    rb_warning("vtime option ignored if intr flag is unset");
+	}
     }
     len = (int)rb_thread_io_blocking_region(nogvl_getch, wbuf, fptr->fd);
     switch (len) {
-- 
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