invalid_try_stmt:
   ...
   | 'try' ':' block* except_block+ a='except' b='*' expression ['as' NAME] ':' block+ {
        RAISE_SYNTAX_ERROR_KNOWN_RANGE(a, b, "cannot have 'except*' on a 'try' statement with 'except'") }
   | 'try' ':' block* except_star_block+ a='except' [expression ['as' NAME]] ':' block+ {
        RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "cannot have 'except' on a 'try' statement with 'except*'") }