parse.y: set encoding

* parse.y (rb_str_dynamic_intern): associate proper encoding with
  the result symbol.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45439 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

encoding.c

@@ -747,9 +747,6 @@ rb_enc_get_index(VALUE obj)
 	obj = rb_id2str(SYM2ID(obj));
     }
     switch (BUILTIN_TYPE(obj)) {
-      case T_SYMBOL:
-	obj = RSYMBOL(obj)->fstr;
-	/* fall through */
       as_default:
       default:
       case T_STRING:

parse.y

@@ -10685,12 +10685,14 @@ rb_str_dynamic_intern(VALUE str)
 	    str = rb_str_dup(str);
 	    rb_enc_associate(str, ascii);
 	    OBJ_FREEZE(str);
+	    enc = ascii;
 	}
     }
 
     type = rb_str_symname_type(str, IDSET_ATTRSET_FOR_INTERN);
     str = rb_fstring(str);
     dsym = rb_newobj_of(rb_cSymbol, T_SYMBOL);
+    rb_enc_associate(dsym, enc);
     OBJ_FREEZE(dsym);
     RSYMBOL(dsym)->fstr = str;
     RSYMBOL(dsym)->type = type;