https://git.ruby-lang.org/ruby.git/commit/?id=89cef1c56b

From 89cef1c56b3a0f9c5e6ccc22a5044477a4fd16c1 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 3 Jul 2019 15:22:16 +0900
Subject: Version guard for [Feature #15974]


diff --git a/spec/ruby/core/objectspace/define_finalizer_spec.rb b/spec/ruby/core/objectspace/define_finalizer_spec.rb
index 3a9132e..fef7667 100644
--- a/spec/ruby/core/objectspace/define_finalizer_spec.rb
+++ b/spec/ruby/core/objectspace/define_finalizer_spec.rb
@@ -66,29 +66,31 @@ describe "ObjectSpace.define_finalizer" do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/objectspace/define_finalizer_spec.rb#L66
     ruby_exe(code).lines.sort.should == ["finalized1\n", "finalized2\n"]
   end
 
-  it "warns in verbose mode if it is self-referencing" do
-    code = <<-RUBY
-      obj = "Test"
-      handler = Proc.new { puts "finalized" }
-      ObjectSpace.define_finalizer(obj, handler)
-      exit 0
-    RUBY
-
-    ruby_exe(code, :options => "-w", :args => "2>&1").should include("warning: object is reachable from finalizer - it may never be run")
-  end
-
-  it "warns in verbose mode if it is indirectly self-referencing" do
-    code = <<-RUBY
-      def scoped(indirect)
-        Proc.new { puts "finalized" }
-      end
-      obj = "Test"
-      indirect = [obj]
-      handler = scoped(indirect)
-      ObjectSpace.define_finalizer(obj, handler)
-      exit 0
-    RUBY
-
-    ruby_exe(code, :options => "-w", :args => "2>&1").should include("warning: object is reachable from finalizer - it may never be run")
+  ruby_version_is "2.7" do
+    it "warns in verbose mode if it is self-referencing" do
+      code = <<-RUBY
+        obj = "Test"
+        handler = Proc.new { puts "finalized" }
+        ObjectSpace.define_finalizer(obj, handler)
+        exit 0
+      RUBY
+
+      ruby_exe(code, :options => "-w", :args => "2>&1").should include("warning: object is reachable from finalizer - it may never be run")
+    end
+
+    it "warns in verbose mode if it is indirectly self-referencing" do
+      code = <<-RUBY
+        def scoped(indirect)
+          Proc.new { puts "finalized" }
+        end
+        obj = "Test"
+        indirect = [obj]
+        handler = scoped(indirect)
+        ObjectSpace.define_finalizer(obj, handler)
+        exit 0
+      RUBY
+
+      ruby_exe(code, :options => "-w", :args => "2>&1").should include("warning: object is reachable from finalizer - it may never be run")
+    end
   end
 end
-- 
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