Ticket #30501: 30501.2.patch

src/wp-includes/rewrite.php

@@ -2045 +2045 @@
          * @param bool $hard Whether to update .htaccess (hard flush) or just update rewrite_rules option (soft flush). Default is true (hard).
          */
         public function flush_rules($hard = true) {
+                
+                static $do_hard_later;
+
                 // Prevent this action from running before everyone has registered their rewrites
                 if ( ! did_action( 'wp_loaded' ) ) {
                         add_action( 'wp_loaded', array( $this, 'flush_rules' ) );
+                        $do_hard_later = $hard;
                         return;
+                } elseif ( isset( $do_hard_later ) && doing_action( 'wp_loaded' ) ) {
+                        $hard = $do_hard_later;
+                        $do_hard_later = null;
                 }
 
                 delete_option('rewrite_rules');
                 $this->wp_rewrite_rules();
+
                 /**
                  * Filter whether a "hard" rewrite rule flush should be performed when requested.
                  *