variable.c: preserve name encoding of subclass

* variable.c (rb_tmp_class_path): preserve name encoding of an
  anonymous instance of module/class subclass.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49778 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Feb 28 15:02:02 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* variable.c (rb_tmp_class_path): preserve name encoding of an
+	  anonymous instance of module/class subclass.
+
 Sat Feb 28 08:24:30 2015  Rei Odaira  <Rei.Odaira@gmail.com>
 
 	* ext/pty/pty.c: AIX supports autopush.

test/ruby/test_module.rb

@@ -1087,6 +1087,8 @@ class TestModule < Test::Unit::TestCase
     assert_equal("C\u{df}", c.name, '[ruby-core:24600]')
     c = eval("class C\u{df}; self; end")
     assert_equal("TestModule::C\u{df}", c.name, '[ruby-core:24600]')
+    c = Module.new.module_eval("class X\u{df} < Module; self; end")
+    assert_match(/::X\u{df}:/, c.new.to_s)
   end
 
   def test_method_added

variable.c

@@ -228,21 +228,19 @@ rb_tmp_class_path(VALUE klass, int *permanent, path_cache_func cache_path)
 	return (VALUE)n;
     }
     else {
-	const char *s = "Class";
-
 	if (RB_TYPE_P(klass, T_MODULE)) {
 	    if (rb_obj_class(klass) == rb_cModule) {
-		s = "Module";
+		path = rb_sprintf("#<Module:%p>", (void*)klass);
 	    }
 	    else {
 		int perm;
-		VALUE path;
-
 		path = rb_tmp_class_path(RBASIC(klass)->klass, &perm, cache_path);
-		s = RSTRING_PTR(path);
+		path = rb_sprintf("#<%"PRIsVALUE":%p>", path, (void*)klass);
 	    }
 	}
-	path = rb_sprintf("#<%s:%p>", s, (void*)klass);
+	else {
+	    path = rb_sprintf("#<Class:%p>", (void*)klass);
+	}
 	OBJ_FREEZE(path);
 
 	cache_path(klass, tmp_classpath, path);