sas - bison の空のルールによる Shift Reduce エラー

Question

以下の yacc 文法があります。

OPTIONS:OPTIONS OPTION                  {printf("%s\n", "Options    enabled");}
        | OPTION                        {printf("%s\n",     "First option");}
        |
        ;

OPTION:   DEBUG                         {printf("%s\n",   "debug enabled");}
        | NESTING                       {printf("%s\n", "nesting enabled");}
        | '(' STACK '=' NAME ')'        {printf("%s\n", "stack size given");}
    | NOLIST                        {printf("%s\n", "nolist enabled");}
    | VIEW EQ NAME                  {printf("%s\n", "this is a view, first name is view name");}
    ;

空のルールの場合、シフト/縮小エラーが発生します。エラーの Y.output ファイルは次のようになります。

17 OPTIONS: . OPTIONS OPTION
18        | . OPTION
19        | .  [SEMICOLON, VIEW, DEBUG, NESTING, NOLIST, '(']
20 OPTION: . DEBUG
21       | . NESTING
22       | . '(' STACK '=' NAME ')'
23       | . NOLIST
24       | . VIEW EQ NAME

NAME     shift, and go to state 4
VIEW     shift, and go to state 11
DEBUG    shift, and go to state 12
NESTING  shift, and go to state 13
NOLIST   shift, and go to state 14
'('      shift, and go to state 15

VIEW      [reduce using rule 19 (OPTIONS)]
DEBUG     [reduce using rule 19 (OPTIONS)]
NESTING   [reduce using rule 19 (OPTIONS)]
NOLIST    [reduce using rule 19 (OPTIONS)]
'('       [reduce using rule 19 (OPTIONS)]
$default  reduce using rule 19 (OPTIONS)

誰かが問題を解決する方法を提案できますか?