sprintf.c: nil value is valid

* sprintf.c (rb_str_format): look up the key, then get default
  value and raise KeyError if the returned value is nil.
  [ruby-dev:49338] [Ruby trunk - Bug #11677]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52537 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index 97eb4809c4..8af94a89fe 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -415,4 +415,9 @@ class TestSprintf < Test::Unit::TestCase
     assert_equal("hello world", "hello %{location}" % h)
     assert_equal("hello world", "hello %<location>s" % h)
   end
+
+  def test_named_with_nil
+    h = { key: nil, key2: "key2_val" }
+    assert_equal("key is , key2 is key2_val", "key is %{key}, key2 is %{key2}" % h)
+  end
 end