Failure/success check missing

With DEBUG ON, when viewing pages list I get:

PHP Notice: Trying to access array offset on value of type bool in /my_wordpress/wp-content/plugins/ocean-extra/ocean-extra.php on line 420

My correction was to check wp_get_attachment_image_src return by testing $get_image‘s type (=false if wp_get_attachment_image_src failed) :

$get_image = wp_get_attachment_image_src( get_post_thumbnail_id( get_the_ID() ), 'full' );
if (!is_bool($get_image)) {
    $image = $get_image[0];
    $has_img = true;
}