vm_method.c: preserve encoding

* vm_method.c (rb_attr): preserve encoding of the attribute ID in
  error message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Oct  9 18:03:01 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_method.c (rb_attr): preserve encoding of the attribute ID in
+	  error message.
+
 Wed Oct  9 17:40:16 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* string.c (rb_fstring): because of lazy sweep, str may be unmaked

test/ruby/test_module.rb

@@ -247,6 +247,7 @@ class TestModule < Test::Unit::TestCase
       "",
       ":",
       ["String::", "[Bug #7573]"],
+      "\u{3042}",
     ].each do |name, msg|
       expected = "wrong constant name %s" % name
       msg = "#{msg}#{': ' if msg}wrong constant name #{name.dump}"
@@ -1653,11 +1654,12 @@ class TestModule < Test::Unit::TestCase
   end
 
   def test_invalid_attr
-    %w[
+    %W[
       foo?
       @foo
       @@foo
       $foo
+      \u{3042}$
     ].each do |name|
       assert_raise_with_message(NameError, /#{Regexp.quote(name)}/) do
         Module.new { attr_accessor name.to_sym }

vm_method.c

@@ -812,7 +812,6 @@ rb_method_boundp(VALUE klass, ID id, int ex)
 void
 rb_attr(VALUE klass, ID id, int read, int write, int ex)
 {
-    const char *name;
     ID attriv;
     VALUE aname;
     rb_method_flag_t noex;
@@ -836,15 +835,13 @@ rb_attr(VALUE klass, ID id, int read, int write, int ex)
     }
 
     if (!rb_is_local_id(id) && !rb_is_const_id(id)) {
-	rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id));
+	rb_name_error_str(id, "invalid attribute name `%"PRIsVALUE"'", QUOTE_ID(id));
     }
-    name = rb_id2name(id);
-    if (!name) {
+    aname = rb_id2str(id);
+    if (NIL_P(aname)) {
 	rb_raise(rb_eArgError, "argument needs to be symbol or string");
     }
-    aname = rb_sprintf("@%s", name);
-    rb_enc_copy(aname, rb_id2str(id));
-    attriv = rb_intern_str(aname);
+    attriv = rb_intern_str(rb_sprintf("@%"PRIsVALUE, aname));
     if (read) {
 	rb_add_method(klass, id, VM_METHOD_TYPE_IVAR, (void *)attriv, noex);
     }