Index: src/wp-includes/class-wp-query.php
===================================================================
--- src/wp-includes/class-wp-query.php	(revision 53362)
+++ src/wp-includes/class-wp-query.php	(working copy)
@@ -2754,8 +2754,6 @@
 			}
 		}
 
-		$clauses = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
-
 		/*
 		 * Apply post-paging filters on where and join. Only plugins that
 		 * manipulate paging queries should use these hooks.
@@ -2835,6 +2833,8 @@
 			 */
 			$fields = apply_filters_ref_array( 'posts_fields', array( $fields, &$this ) );
 
+			$clauses = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
+
 			/**
 			 * Filters all query clauses at once, for convenience.
 			 *
@@ -2967,6 +2967,8 @@
 			 */
 			$limits = apply_filters_ref_array( 'post_limits_request', array( $limits, &$this ) );
 
+			$clauses = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
+
 			/**
 			 * Filters all query clauses at once, for convenience.
 			 *
@@ -2990,7 +2992,7 @@
 			 * }
 			 * @param WP_Query $query  The WP_Query instance (passed by reference).
 			 */
-			$clauses = (array) apply_filters_ref_array( 'posts_clauses_request', array( $clauses, &$this ) );
+			$clauses = (array) apply_filters_ref_array( 'posts_clauses_request', array( compact( $clauses ), &$this ) );
 
 			$where    = isset( $clauses['where'] ) ? $clauses['where'] : '';
 			$groupby  = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';