From 91971b28a7ebcf02f44a544bca9888898b5464a8 Mon Sep 17 00:00:00 2001
From: Andrew Nacin <wp@andrewnacin.com>
Date: Sat, 12 Apr 2014 19:04:15 +0000
Subject: [PATCH] User Query: Don't blindly re-append new meta queries for
 capabilities.

fixes #21119.

Built from https://develop.svn.wordpress.org/trunk@28087


git-svn-id: http://core.svn.wordpress.org/trunk@27918 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/user.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wp-includes/user.php b/wp-includes/user.php
index b9b50dd485..5a9dc466ac 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -665,7 +665,9 @@ class WP_User_Query {
 				$cap_meta_query['compare'] = 'like';
 			}
 
-			$qv['meta_query'][] = $cap_meta_query;
+			if ( empty( $qv['meta_query'] ) || ! in_array( $cap_meta_query, $qv['meta_query'], true ) ) {
+				$qv['meta_query'][] = $cap_meta_query;
+			}
 		}
 
 		$meta_query = new WP_Meta_Query();