From 570642bf154a2366506202821584ac38e5a8c4ff Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 18 Dec 2017 04:23:16 +0000
Subject: [PATCH] envutil.rb: define flush method

* test/lib/envutil.rb (verbose_warning): flush is called on STDOUT
  and STDERR sometimes.

From: Nobuyoshi Nakada <nobu@ruby-lang.org>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/lib/envutil.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/lib/envutil.rb b/test/lib/envutil.rb
index a5621963e1..fce0e1b382 100644
--- a/test/lib/envutil.rb
+++ b/test/lib/envutil.rb
@@ -174,6 +174,7 @@ module EnvUtil
   def verbose_warning
     class << (stderr = "".dup)
       alias write concat
+      def flush; end
     end
     stderr, $stderr = $stderr, stderr
     $VERBOSE = true