id summary reporter owner description type status priority milestone component version severity resolution keywords cc focuses 48957 Call to a member function format() on boolean in wp-includes/feed.php dd32 Rarst "[46774] / #48675 is causing a PHP fatal on buddypress.org, that may ultimately be caused by BuddyPress, but either way is a new core fatal condition as of 5.3.1. {{{ Fatal error: Uncaught Error: Call to a member function format() on boolean in wp-includes/feed.php on line 692 }}} The root cause of the issue is that the `WP_Post` object appears to have been emptied by BP similar to this: https://github.com/buddypress/BuddyPress/blob/fe47890c1ab7e2cb24c005f1c35fb9c6c8c8ab7c/src/bp-members/classes/class-bp-members-theme-compat.php#L119-L136 That ultimately means that `$modified_times` is `[ 0 ]` which causes `date_create_immutable_from_format()` to return false instead of the expected `DateTime` object. cc @SergeyBiryukov @johnjamesjacoby" defect (bug) closed high 5.3.2 Date/Time 5.3.1 normal fixed has-patch has-unit-tests fixed-major