io.c: preserve encodings

* io.c (must_respond_to): preserve encodings of variable name and
  class name in warning message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48546 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 39f357a6b9..02381b132c 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2268,6 +2268,14 @@ End
     assert_raise(TypeError) { $> = Object.new }
 
     assert_in_out_err([], "$> = $stderr\nputs 'foo'", [], %w(foo))
+
+    assert_separately(%w[-Eutf-8], <<-"end;") #    do
+      alias $\u{6a19 6e96 51fa 529b} $stdout
+      x = eval("class X\u{307b 3052}; self; end".encode("euc-jp"))
+      assert_raise_with_message(TypeError, /\\$\u{6a19 6e96 51fa 529b} must.*, X\u{307b 3052} given/) do
+        $\u{6a19 6e96 51fa 529b} = x.new
+      end
+    end;
   end
 
   def test_initialize