New without a class
-----
<?php
new;
-----
!!php5
Syntax error, unexpected ';' from 2:4 to 2:4
array(
)
-----
<?php
new;
-----
!!php7
Syntax error, unexpected ';' from 2:4 to 2:4
array(
    0: Expr_New(
        class: Expr_Error(
        )
        args: array(
        )
    )
)