* bignum.c (rb_big_aref): check for Bignum index range.

 [ruby-dev:31271]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/test/ruby/test_integer.rb b/test/ruby/test_integer.rb
index 2744f3df42..4ffe0c2fce 100644
--- a/test/ruby/test_integer.rb
+++ b/test/ruby/test_integer.rb
@@ -117,6 +117,13 @@ class TestInteger < Test::Unit::TestCase
         end
       }
     }
+
+    # [ruby-dev:31271]
+    # assert_equal(1, (1 << 0x40000000)[0x40000000])
+    # assert_equal(0, (-1 << 0x40000001)[0x40000000])
+    big_zero = 0x40000000.coerce(0)[0]
+    assert_equal(0, (-0x40000002)[big_zero])
+    assert_equal(1, 0x400000001[big_zero])
   end
 
   def test_plus