util.c: ignore too long fraction part

* util.c (ruby_strtod): ignore too long fraction part, which does not
  affect the result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 127c8c6f92..798185b44a 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -613,4 +613,10 @@ class TestFloat < Test::Unit::TestCase
     # always not flonum
     assert_raise(TypeError) { a = Float::INFINITY; def a.foo; end }
   end
+
+  def test_long_string
+    assert_separately([], <<-'end;')
+    assert_in_epsilon(10.0, ("1."+"1"*300000).to_f*9)
+    end;
+  end
 end