* random.c (rb_random_real): check the range of result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29094 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index f95d8870a1..4a8b700c77 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1899,6 +1899,19 @@ class TestArray < Test::Unit::TestCase
     end
   end
 
+  def test_shuffle_random
+    cc = nil
+    gen = proc do
+      10000000
+    end
+    class << gen
+      alias rand call
+    end
+    assert_raise(RangeError) {
+      [*0..2].shuffle(random: gen)
+    }
+  end
+
   def test_sample
     100.times do
       assert([0, 1, 2].include?([2, 1, 0].sample))