https://git.ruby-lang.org/ruby.git/commit/?id=456586bb23

From 456586bb234915107da255d2944f620a7dd7048b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 14 May 2019 14:21:46 +0900
Subject: io/console: support getch timeout on Windows


diff --git a/ext/io/console/console.c b/ext/io/console/console.c
index 0df6725..2d63c1b 100644
--- a/ext/io/console/console.c
+++ b/ext/io/console/console.c
@@ -419,7 +419,15 @@ console_getch(int argc, VALUE *argv, VALUE io) https://github.com/ruby/ruby/blob/trunk/ext/io/console/console.c#L419
 
     GetOpenFile(io, fptr);
     if (optp) {
-	rb_warning("option ignored");
+	struct timeval *to = NULL, tv;
+	if (optp->vtime) {
+	    to = &tv;
+	    tv.tv_sec = optp->vtime / 10;
+	    tv.tv_usec = (optp->vtime % 10) * 100000;
+	}
+	if (optp->vmin) {
+	    rb_warning("min option ignored");
+	}
     }
     w = rb_wait_for_single_fd(fptr->fd, RB_WAITFD_IN, NULL);
     if (w < 0) rb_eof_error();
-- 
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