Ticket #29077: 29077.2.patch

src/wp-includes/cron.php

@@ -107 +107 @@
         $interval = 0;
 
         // First we try to get it from the schedule
-        if ( 0 == $interval )
+        if ( isset( $schedules[ $recurrence ] ) ) {
                 $interval = $schedules[$recurrence]['interval'];
+        }
+
         // Now we try to get it from the saved interval in case the schedule disappears
-        if ( 0 == $interval )
+        if ( 0 == $interval ) {
                 $interval = $crons[$timestamp][$hook][$key]['interval'];
+        }
+
         // Now we assume something is wrong and fail to schedule
-        if ( 0 == $interval )
+        if ( 0 == $interval ) {
                 return false;
+        }
 
         $now = time();
 
-        if ( $timestamp >= $now )
+        if ( $timestamp >= $now ) {
                 $timestamp = $now + $interval;
-        else
+        } else {
                 $timestamp = $now + ($interval - (($now - $timestamp) % $interval));
+        }
 
         wp_schedule_event( $timestamp, $recurrence, $hook, $args );
 }