https://git.ruby-lang.org/ruby.git/commit/?id=756e8a2cf3

From 756e8a2cf3424b9a3eb9dde4a01325cba21a7e81 Mon Sep 17 00:00:00 2001
From: Sorah Fukumori <sorah@c...>
Date: Wed, 17 Mar 2021 02:40:43 +0900
Subject: test_zlib(test_path_tmpfile): fix Zlib instance leak

follow-up: commit cf831f49189c4a890da6845e39199a5dfaf4fb48
---
 test/zlib/test_zlib.rb | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index 4da3bb4..83ce375 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -735,11 +735,13 @@ if defined? Zlib https://github.com/ruby/ruby/blob/trunk/test/zlib/test_zlib.rb#L735
           io.write sio.string
           io.rewind
 
-          gz = Zlib::GzipWriter.new(io)
-          assert_raise(NoMethodError) { gz.path }
+          gz0 = Zlib::GzipWriter.new(io)
+          assert_raise(NoMethodError) { gz0.path }
 
-          gz = Zlib::GzipReader.new(io)
-          assert_raise(NoMethodError) { gz.path }
+          gz1 = Zlib::GzipReader.new(io)
+          assert_raise(NoMethodError) { gz1.path }
+          gz0.close
+          gz1.close
         end
       end
     end
-- 
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