Wordpress pre_get_posts and date_query showing blank screen - wordpress

Question

I'm trying to implement a filter on wp_query to show annual archives by School Year (sept - may) rather than jan-dec. When I view a yearly archive page, such as sitename.com/2017/, I get a white screen of death, and no PHP errors.
My code in functions.php looks like the following:
add_action( 'pre_get_posts', 'school_year_filter' );
function school_year_filter($query) {
if (! is_admin() && $query->is_main_query() && $query->is_year() && $query->is_archive()) {
$year = get_query_var('year');
$year2 = $year + 1;
$query->set(
'date_query' => array(
array(
'after' => array(
'year' => "$year",
'month' => '9',
'day' => '1',
),
'before' => array(
'year' => "$year2",
'month' => '5',
'day' => '31',
),
'inclusive' => true,
),
),
);
}
}

Answer 1

Try this code.
I changed this line 'date_query'=>array( to 'date_query', array(.
add_action( 'pre_get_posts', 'school_year_filter' );
function school_year_filter($query) {
if (! is_admin() && $query->is_main_query() && $query->is_year() && $query->is_archive()) {
$year = get_query_var('year');
$year2 = $year + 1;
$query->set(
'date_query', array(
array(
'after' => array(
'year' => $year,
'month' => '9',
'day' => '1',
),
'before' => array(
'year' => $year2,
'month' => '5',
'day' => '31',
),
'inclusive' => true,
),
)
);
}
}
https://codex.wordpress.org/Plugin_API/Action_Reference/pre_get_posts#Only_Display_Search_Results_After_Specific_Date