parse.y: preserve encoding

* parse.y (parser_yyerror): preserve source code encoding in
  syntax error messages.  [ruby-core:64228] [Bug #10114]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47090 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Aug  7 06:04:49 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (parser_yyerror): preserve source code encoding in
+	  syntax error messages.  [ruby-core:64228] [Bug #10114]
+
 Wed Aug  6 20:56:02 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c: separate src of WIN32OLE_TYPELIB from

parse.y

@@ -5261,7 +5261,7 @@ parser_yyerror(struct parser_params *parser, const char *msg)
 	buf = ALLOCA_N(char, len+2);
 	MEMCPY(buf, p, char, len);
 	buf[len] = '\0';
-	rb_compile_error_append("%s%s%s", pre, buf, post);
+	rb_compile_error_with_enc(NULL, 0, (void *)current_enc, "%s%s%s", pre, buf, post);
 
 	i = (int)(lex_p - p);
 	p2 = buf; pe = buf + len;

test/ruby/test_syntax.rb

@@ -435,6 +435,12 @@ eom
     assert_syntax_error("0.0.0", msg)
   end
 
+  def test_error_message_encoding
+    bug10114 = '[ruby-core:64228] [Bug #10114]'
+    code = "# -*- coding: utf-8 -*-\n" "def n \"\u{2208}\"; end"
+    assert_syntax_error(code, /def n "\u{2208}"; end/, bug10114)
+  end
+
   private
 
   def not_label(x) @result = x; @not_label ||= nil end