From c7493264a41addda75c05e49d65e8cc2bbbeaf44 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Sun, 28 Jul 2019 17:52:56 +0000
Subject: [PATCH] Rewrite Rules: Check if `$wp_rewrite->flush_rules()` is
 callable before calling it in `flush_rewrite_rules()`.

Props bsetiawan88, markjaquith.
Fixes #47087.
Built from https://develop.svn.wordpress.org/trunk@45699


git-svn-id: http://core.svn.wordpress.org/trunk@45510 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/rewrite.php | 5 ++++-
 wp-includes/version.php | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/wp-includes/rewrite.php b/wp-includes/rewrite.php
index a03754f272..2666ff6f97 100644
--- a/wp-includes/rewrite.php
+++ b/wp-includes/rewrite.php
@@ -273,7 +273,10 @@ function add_feed( $feedname, $function ) {
  */
 function flush_rewrite_rules( $hard = true ) {
 	global $wp_rewrite;
-	$wp_rewrite->flush_rules( $hard );
+
+	if ( is_callable( array( $wp_rewrite, 'flush_rules' ) ) ) {
+		$wp_rewrite->flush_rules( $hard );
+	}
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3d09776eb0..acabe2ec7d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45698';
+$wp_version = '5.3-alpha-45699';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.