bigdecimal.c: fix FloatDomainError

* ext/bigdecimal/bigdecimal.c (GetVpValueWithPrec): consider
  non-finite float values not to raise FloatDomainError.
  [ruby-core:75682] [Bug #12414]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55123 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index f10c50b47a..4296b50c59 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -459,6 +459,18 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_equal(false, BigDecimal.new("NaN") > n1)
   end
 
+  def test_cmp_float_nan
+    assert_equal(nil, BigDecimal.new("1") <=> Float::NAN)
+  end
+
+  def test_cmp_float_pos_inf
+    assert_equal(-1, BigDecimal.new("1") <=> Float::INFINITY)
+  end
+
+  def test_cmp_float_neg_inf
+    assert_equal(+1, BigDecimal.new("1") <=> -Float::INFINITY)
+  end
+
   def test_cmp_failing_coercion
     n1 = BigDecimal.new("1")
     assert_equal(nil, n1 <=> nil)