* bignum.c (rb_big2dbl), test/ruby/test_bignum.rb (test_to_f): A negative Bignum out of Float range should be converted to -Infinity. [ruby-core:30492] [Bug #3362]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@28324 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_bignum.rb b/test/ruby/test_bignum.rb
index 99c5952173..a0405ca274 100644
--- a/test/ruby/test_bignum.rb
+++ b/test/ruby/test_bignum.rb
@@ -103,4 +103,10 @@ class TestBignum < Test::Unit::TestCase
     e = assert_raise(RangeError) {(1 << big).to_s}
     assert_match(/too big to convert/, e.message)
   end
+
+  def test_to_f
+    inf = 1 / 0.0
+    assert_equal(inf,  (1  << 65536).to_f)
+    assert_equal(-inf, (-1 << 65536).to_f) # [ruby-core:30492] [Bug #3362]
+  end
 end