sprintf.c: coderange fix

* sprintf.c (ruby__sfvwrite): set buffer length and exclude
  uninitialized garbage to get correct coderange.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36706 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/test/-ext-/test_printf.rb b/test/-ext-/test_printf.rb
index f801030c07..fc4e065345 100644
--- a/test/-ext-/test_printf.rb
+++ b/test/-ext-/test_printf.rb
@@ -21,4 +21,11 @@ class Test_SPrintf < Test::Unit::TestCase
   def test_inspect
     assert_equal("{<#{self.class}:#{object_id}>}", Bug::Printf.v(self))
   end
+
+  def test_encoding
+    def self.to_s
+      "\u{3042 3044 3046 3048 304a}"
+    end
+    assert_equal("<\u{3042 3044 3046 3048 304a}>", Bug::Printf.s(self))
+  end
 end