https://git.ruby-lang.org/ruby.git/commit/?id=7f3786c3e8

From 7f3786c3e86a685a1a6332a1e0c9290f9b9df414 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 10 Oct 2021 01:20:40 +0900
Subject: Use an isolated class

The number of all instances of `Class` may be affected by GC-able
anonymous classes created by other tests.
---
 spec/ruby/library/objectspace/memsize_of_all_spec.rb | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/spec/ruby/library/objectspace/memsize_of_all_spec.rb b/spec/ruby/library/objectspace/memsize_of_all_spec.rb
index 6898862e8f..c5a48165ce 100644
--- a/spec/ruby/library/objectspace/memsize_of_all_spec.rb
+++ b/spec/ruby/library/objectspace/memsize_of_all_spec.rb
@@ -13,9 +13,10 @@ describe "ObjectSpace.memsize_of_all" do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/objectspace/memsize_of_all_spec.rb#L13
   end
 
   it "increases when a new object is allocated" do
-    before = ObjectSpace.memsize_of_all(Class)
-    o = Class.new
-    after = ObjectSpace.memsize_of_all(Class)
+    c = Class.new
+    before = ObjectSpace.memsize_of_all(c)
+    o = c.new
+    after = ObjectSpace.memsize_of_all(c)
     after.should > before
   end
 end
-- 
cgit v1.2.1


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