From 37003e92e8e59dca22c8f71fff101109192b82a9 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 6 Nov 2026 03:45:39 +0900
Subject: [PATCH] [ruby/test-unit-ruby-core] Freeze `RbConfig.ruby` for sharing
 among Ractors

https://github.com/ruby/test-unit-ruby-core/commit/677bcb7206
---
 tool/lib/envutil.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index c620b8dbdb4..1b548b0cbf9 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -518,7 +518,7 @@ end
 
 if defined?(RbConfig)
   module RbConfig
-    @ruby = EnvUtil.rubybin
+    @ruby = EnvUtil.rubybin.freeze
     class << self
       undef ruby if method_defined?(:ruby)
       attr_reader :ruby