From 304b544651184cec49af8f450cadce5bcd660922 Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 11 Jul 2018 10:28:02 +0000
Subject: test/ruby/test_io.rb (test_copy_stream_to_duplex_io): join thread

Don't leave runaway threads as it could affect other tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 4312d030c1..a6a8e78209 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1188,10 +1188,11 @@ class TestIO < Test::Unit::TestCase
 
   def test_copy_stream_to_duplex_io
     result = IO.pipe {|a,w|
-      Thread.start {w.puts "yes"; w.close}
+      th = Thread.start {w.puts "yes"; w.close}
       IO.popen([EnvUtil.rubybin, '-pe$_="#$.:#$_"'], "r+") {|b|
         IO.copy_stream(a, b)
         b.close_write
+        assert_join_threads([th])
         b.read
       }
     }
-- 
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