merge revision(s) b176d4f52e4af67654814dab3e9c5f4bf9170e54: [Backport #21008]

	[Bug #21008] Normalize before sum to float

	After switching to `Float`-mode when summing `Numeric` objects,
	normalization for `Float` is still needed.

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 7599d43463..cd62cd8acb 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -1043,4 +1043,19 @@ class TestEnumerator < Test::Unit::TestCase
     assert_raise(FrozenError) { e.feed 1 }
     assert_raise(FrozenError) { e.rewind }
   end
+
+  def test_sum_of_numeric
+    num = Class.new(Numeric) do
+      attr_reader :to_f
+      def initialize(val)
+        @to_f = Float(val)
+      end
+    end
+
+    ary = [5, 10, 20].map {|i| num.new(i)}
+
+    assert_equal(35.0, ary.sum)
+    enum = ary.each
+    assert_equal(35.0, enum.sum)
+  end
 end