From 95a110a9af0b5bfe393934fa177abea58c0fee46 Mon Sep 17 00:00:00 2001
From: Satoshi Tagomori <s-tagomori@sakura.ad.jp>
Date: Thu, 6 Nov 2025 15:33:58 +0900
Subject: [PATCH] Define ::Ruby module earlier to define classes under it

---
 inits.c   | 1 +
 version.c | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/inits.c b/inits.c
index 4569362b95..4988fa09d0 100644
--- a/inits.c
+++ b/inits.c
@@ -52,6 +52,7 @@ rb_call_inits(void)
     CALL(Time);
     CALL(Random);
     CALL(load);
+    CALL(Ruby_module);
     CALL(Box);
     CALL(Proc);
     CALL(Binding);
diff --git a/version.c b/version.c
index d634755efd..0a3bc7bf9b 100644
--- a/version.c
+++ b/version.c
@@ -12,6 +12,7 @@
 #include "internal/cmdlineopt.h"
 #include "internal/parse.h"
 #include "internal/gc.h"
+#include "ruby/internal/globals.h"
 #include "ruby/ruby.h"
 #include "version.h"
 #include "vm_core.h"
@@ -112,6 +113,12 @@ define_ruby_const(VALUE mod, const char *name, VALUE value, bool toplevel)
 #define rb_define_const(mod, name, value) \
     define_ruby_const(mod, (mod == mRuby ? "RUBY_" name : name), value, (mod == mRuby))
 
+void
+Init_Ruby_module(void)
+{
+    rb_define_module("Ruby");
+}
+
 /*! Defines platform-depended Ruby-level constants */
 void
 Init_version(void)
@@ -123,7 +130,7 @@ Init_version(void)
      * The constants defined here are aliased in the toplevel with
      * +RUBY_+ prefix.
      */
-    VALUE mRuby = rb_define_module("Ruby");
+    VALUE mRuby = rb_path2class("Ruby");
 
     enum {ruby_patchlevel = RUBY_PATCHLEVEL};
     VALUE version = MKSTR(version);