https://git.ruby-lang.org/ruby.git/commit/?id=de3f725978

From de3f725978730d16ee51401d40fa75ac12c871a0 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 6 May 2020 14:08:26 +0900
Subject: Makes nil-safe


diff --git a/tool/lib/leakchecker.rb b/tool/lib/leakchecker.rb
index bd0e24b..a94d7a7 100644
--- a/tool/lib/leakchecker.rb
+++ b/tool/lib/leakchecker.rb
@@ -100,7 +100,7 @@ class LeakChecker https://github.com/ruby/ruby/blob/trunk/tool/lib/leakchecker.rb#L100
             next if /darwin/ =~ RUBY_PLATFORM and [0, -1].include?(s.dev)
             str << ' ' << s.inspect
           ensure
-            io.close
+            io&.close
           end
         end
         puts "Leaked file descriptor: #{test_name}: #{fd}#{str}"
-- 
cgit v0.10.2


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