Array with empty elements
-----
<?php

[1, , 2];
array(1, , 2);
-----
!!positions
Cannot use empty array elements in arrays from 3:5 to 3:5
Cannot use empty array elements in arrays from 4:10 to 4:10
array(
    0: Stmt_Expression[3:1 - 3:9](
        expr: Expr_Array[3:1 - 3:8](
            items: array(
                0: ArrayItem[3:2 - 3:2](
                    key: null
                    value: Scalar_Int[3:2 - 3:2](
                        value: 1
                    )
                    byRef: false
                    unpack: false
                )
                1: ArrayItem[3:5 - 3:5](
                    key: null
                    value: Expr_Error[3:5 - 3:5](
                    )
                    byRef: false
                    unpack: false
                )
                2: ArrayItem[3:7 - 3:7](
                    key: null
                    value: Scalar_Int[3:7 - 3:7](
                        value: 2
                    )
                    byRef: false
                    unpack: false
                )
            )
        )
    )
    1: Stmt_Expression[4:1 - 4:14](
        expr: Expr_Array[4:1 - 4:13](
            items: array(
                0: ArrayItem[4:7 - 4:7](
                    key: null
                    value: Scalar_Int[4:7 - 4:7](
                        value: 1
                    )
                    byRef: false
                    unpack: false
                )
                1: ArrayItem[4:10 - 4:10](
                    key: null
                    value: Expr_Error[4:10 - 4:10](
                    )
                    byRef: false
                    unpack: false
                )
                2: ArrayItem[4:12 - 4:12](
                    key: null
                    value: Scalar_Int[4:12 - 4:12](
                        value: 2
                    )
                    byRef: false
                    unpack: false
                )
            )
        )
    )
)