From 34d5625500ec98725b108162685909bf03025a8d Mon Sep 17 00:00:00 2001
From: k0kubun <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 24 May 2018 13:25:40 +0000
Subject: [PATCH] test_rubyoptions.rb: RbConfig::CONFIG['cppflags'] can be nil

not '' at least on AppVeyor

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63502 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_rubyoptions.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 15271cd6e8..6e501a45b6 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -116,7 +116,7 @@ class TestRubyOptions < Test::Unit::TestCase
   def test_verbose
     assert_in_out_err(["-vve", ""]) do |r, e|
       assert_match(VERSION_PATTERN, r[0])
-      if RbConfig::CONFIG['cppflags'].match?(/(\A|\s)-DMJIT_FORCE_ENABLE\b/)
+      if RbConfig::CONFIG.fetch('cppflags', '').match?(/(\A|\s)-DMJIT_FORCE_ENABLE\b/)
         assert_equal(RUBY_DESCRIPTION, r[0])
       else
         assert_equal(NO_JIT_DESCRIPTION, r[0])