file.c: clear coderange for user name

* file.c (rb_file_expand_path_internal): should clear coderange after
  copying user name as binary data.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Jul 25 17:17:52 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* file.c (rb_file_expand_path_internal): should clear coderange after
+	  copying user name as binary data.
+
 Thu Jul 25 16:17:55 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* encoding.c (check_encoding): Check T_DATA or not.

file.c

@@ -2993,6 +2993,7 @@ rb_file_expand_path_internal(VALUE fname, VALUE dname, int abs_mode, int long_na
 	    userlen = s - b;
 	    BUFCHECK(bdiff + userlen >= buflen);
 	    memcpy(p, b, userlen);
+	    ENC_CODERANGE_CLEAR(result);
 	    rb_str_set_len(result, userlen);
 	    rb_enc_associate(result, enc);
 	    rb_home_dir_of(result, result);