Error: Attempt to read property "post_parent" on null

[rickhellewell]

Noticing this error on a WP install (fully updated) with latest Pages theme:

PHP Warning: Attempt to read property "post_parent" on null in <path-to-root>/wp-content/themes/pages/functions.php on line 163

[bhadaway]

I don't see the warning (probably because we're on different versions of PHP), but I do believe I fixed it.

Before I push the update live for everyone are you comfortable testing the fix to see if it clears all warnings?

If so, update lines 160-165 of functions.php to:

if ( isset( $post->post_parent ) ? $post->post_parent : 0 ) {
echo '<li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="' . esc_url( get_permalink( $post->post_parent ) ) . '" itemprop="item"><span itemprop="name">' . esc_attr( get_the_title( $post->post_parent ) ) . '</span></a><meta itemprop="position" content="2" /></li>';
}
if ( is_single() || !empty( $post->post_parent ) ) {
echo ' <span aria-hidden="true">&rarr;</span> ';
}