insns.def: preserve encoding

* insns.def (defineclass): preserve encoding of name in error
  messages for non-class super.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51054 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,7 @@
-Mon Jun 29 02:06:51 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Mon Jun 29 02:08:01 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* insns.def (defineclass): preserve encoding of name in error
+	  messages for non-class super.
 
 	* insns.def (defineclass): preserve encoding of name in error
 	  messages when already defined but type mismatch.

insns.def

@@ -844,8 +844,8 @@ defineclass
 
 	if (VM_DEFINECLASS_HAS_SUPERCLASS_P(flags) &&
 	    !RB_TYPE_P(super, T_CLASS)) {
-	    rb_raise(rb_eTypeError, "superclass must be a Class (%s given)",
-		     rb_obj_classname(super));
+	    rb_raise(rb_eTypeError, "superclass must be a Class (% "PRIsVALUE" given)",
+		     rb_obj_class(super));
 	}
 
 	if (super == Qnil) {

test/ruby/test_class.rb

@@ -359,6 +359,16 @@ class TestClass < Test::Unit::TestCase
         end
       end;
     end
+
+    m = Module.new
+    n = "M\u{1f5ff}"
+    c = m.module_eval "class #{n}; new; end"
+    assert_raise_with_message(TypeError, /#{n}/) {
+      eval <<-"end;"
+        class C < c
+        end
+      end;
+    }
   end
 
   def test_cloned_singleton_method_added