From b7e8876704648cee6866591ac1aca7a54faff742 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 9 Nov 2022 19:36:37 +0900
Subject: [Bug #19100] Add `init_int32` function to `rb_random_interface_t`

Distinguish initialization by single word from initialization by
array.
---
 test/ruby/test_rand.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index f066433f6a..a4beffd689 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -336,6 +336,14 @@ class TestRand < Test::Unit::TestCase
     }
   end
 
+  def test_seed_leading_zero_guard
+    guard = 1<<32
+    range = 0...(1<<32)
+    all_assertions_foreach(nil, 0, 1, 2) do |i|
+      assert_not_equal(Random.new(i).rand(range), Random.new(i+guard).rand(range))
+    end
+  end
+
   def test_marshal
     bug3656 = '[ruby-core:31622]'
     assert_raise(TypeError, bug3656) {
-- 
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