1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index c453ecd350..9b972dcbaa 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -543,4 +543,12 @@ class TestSprintf < Test::Unit::TestCase
       sprintf("%*s", RbConfig::LIMITS["INT_MIN"], "")
     end
   end
+
+  def test_binary_format_coderange
+    1.upto(500) do |i|
+      str = sprintf("%*s".b, i, "\xe2".b)
+      refute_predicate str, :ascii_only?
+      assert_equal i, str.bytesize
+    end
+  end
 end