Trying to get property 'post_type' of non-object in wp-includes/link-template.php on line 682

[ronald2020]

Hi there,

I believe this maybe a bug or at least an unchecked condition (post/page does not exist) throwing the above error. I have legit crawlers visiting that cause these errors.

Running 5.3.2. All plugins disabled (except for Health Check & Troubleshooting). Theme: Twenty.

How to re-produce : ​https://your.site.com/news2020/feed/atom/

It is key that the slug for the post/page does NOT (NO longer) exists.

Stack trace:

1. {main}() /Users/me/root/index.php:0
2. require() /Users/me/root/index.php:17
3. require_once() /Users/me/root/wp-blog-header.php:19
4. do_action() /Users/me/root/wp-includes/template-loader.php:13
5. WP_Hook->do_action() /Users/me/root/wp-includes/plugin.php:478
6. WP_Hook->apply_filters() /Users/me/root/wp-includes/class-wp-hook.php:312
7. redirect_canonical() /Users/me/root/wp-includes/class-wp-hook.php:288
8. is_front_page() /Users/me/root/wp-includes/canonical.php:498
9. WP_Query->is_front_page() /Users/me/root/wp-includes/query.php:456
10. WP_Query->is_page() /Users/me/root/wp-includes/class-wp-query.php:3879

PHP Notice: Trying to get property 'post_type' of non-object in /Users/me/root/wp-includes/link-template.php on line 682

A variant (same sort of problem) throws an error in class-wp-query.php with the following:

​https://your.site.com/news2020/feed/

[MadtownLems]

A variant (same sort of problem) throws an error in class-wp-query.php with the following:
​https://your.site.com/news2020/feed/

You can find more information on this particular bit on this ticket: https://core.trac.wordpress.org/ticket/29660