From 7b6c596e92086ad641c0d1e250c4dcd435cb70d1 Mon Sep 17 00:00:00 2001
From: Pascal Birchler <pascal.birchler@gmail.com>
Date: Thu, 17 Dec 2015 18:13:29 +0000
Subject: [PATCH] In `WP::handle_404()`, make sure `$wp_query->post` is a
 `WP_Post` object before cloning it.

Props igmoweb for initial patch.
See #35013.
Built from https://develop.svn.wordpress.org/trunk@35994


git-svn-id: http://core.svn.wordpress.org/trunk@35959 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/class-wp.php | 7 ++++++-
 wp-includes/version.php  | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/wp-includes/class-wp.php b/wp-includes/class-wp.php
index 06c59bd7b7..9f6172deac 100644
--- a/wp-includes/class-wp.php
+++ b/wp-includes/class-wp.php
@@ -609,7 +609,12 @@ class WP {
 
 			$success = true;
 			if ( is_singular() ) {
-				$p = clone $wp_query->post;
+				$p = false;
+
+				if ( $wp_query->post instanceof WP_Post ) {
+					$p = clone $wp_query->post;
+				}
+
 				// Only set X-Pingback for single posts that allow pings.
 				if ( $p && pings_open( $p ) ) {
 					@header( 'X-Pingback: ' . get_bloginfo( 'pingback_url' ) );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b3920c89c9..c68975dc3f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-35993';
+$wp_version = '4.5-alpha-35994';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.