91     else if (in_vim9script() && check_for_string_arg(avar, 0) == FAIL)  in find_buffer()
282     if (in_vim9script() && check_for_lnum_arg(argvars, 0) == FAIL)  in f_append()
299 	    && (check_for_buffer_arg(argvars, 0) == FAIL  in buf_set_append_line()
300 		|| check_for_lnum_arg(argvars, 1) == FAIL  in buf_set_append_line()
301 		|| check_for_string_or_number_or_list_arg(argvars, 2) == FAIL))  in buf_set_append_line()
331     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)  in f_bufadd()
344     if (in_vim9script() && check_for_buffer_arg(argvars, 0) == FAIL)  in f_bufexists()
358     if (in_vim9script() && check_for_buffer_arg(argvars, 0) == FAIL)  in f_buflisted()
373     if (in_vim9script() && check_for_buffer_arg(argvars, 0) == FAIL)  in f_bufload()
389     if (in_vim9script() && check_for_buffer_arg(argvars, 0) == FAIL)  in f_bufloaded()
405     if (in_vim9script() && check_for_opt_buffer_arg(argvars, 0) == FAIL)  in f_bufname()
430 	    && (check_for_opt_buffer_arg(argvars, 0) == FAIL  in f_bufnr()
432 		    && check_for_opt_bool_arg(argvars, 1) == FAIL)))  in f_bufnr()
463     if (in_vim9script() && check_for_buffer_arg(argvars, 0) == FAIL)  in buf_win_common()
511 	    && (check_for_buffer_arg(argvars, 0) == FAIL  in f_deletebufline()
512 		|| check_for_lnum_arg(argvars, 1) == FAIL  in f_deletebufline()
513 		|| check_for_opt_lnum_arg(argvars, 2) == FAIL))  in f_deletebufline()
556     if (u_save(first - 1, last + 1) == FAIL)  in f_deletebufline()
681 	    && check_for_opt_buffer_or_dict_arg(argvars, 0) == FAIL)  in f_getbufinfo()
742 	if (rettv_list_alloc(rettv) == FAIL)  in get_buffer_lines()
773 				 ml_get_buf(buf, start++, FALSE), -1) == FAIL)  in get_buffer_lines()
789 	    && (check_for_buffer_arg(argvars, 0) == FAIL  in f_getbufline()
790 		|| check_for_lnum_arg(argvars, 1) == FAIL  in f_getbufline()
791 		|| check_for_opt_lnum_arg(argvars, 2) == FAIL))  in f_getbufline()
824 	    && (check_for_lnum_arg(argvars, 0) == FAIL  in f_getline()
825 		|| check_for_opt_lnum_arg(argvars, 1) == FAIL))  in f_getline()
860     if (in_vim9script() && check_for_lnum_arg(argvars, 0) == FAIL)  in f_setline()
923     return FAIL;  in find_win_for_buf()
942     if (find_win_for_buf(buf, &wp, &tp) == FAIL)  in switch_to_win_for_buf()
944     else if (switch_win(save_curwinp, save_curtabp, wp, tp, TRUE) == FAIL)  in switch_to_win_for_buf()