Index: wp-includes/class-wp-query.php
===================================================================
--- wp-includes/class-wp-query.php	(revision 52954)
+++ wp-includes/class-wp-query.php	(working copy)
@@ -2754,7 +2754,7 @@
 			}
 		}
 
-		$clauses = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
+		$pieces = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
 
 		/*
 		 * Apply post-paging filters on where and join. Only plugins that
@@ -2856,7 +2856,7 @@
 			 * }
 			 * @param WP_Query $query   The WP_Query instance (passed by reference).
 			 */
-			$clauses = (array) apply_filters_ref_array( 'posts_clauses', array( compact( $clauses ), &$this ) );
+			$clauses = (array) apply_filters_ref_array( 'posts_clauses', array( compact( $pieces ), &$this ) );
 
 			$where    = isset( $clauses['where'] ) ? $clauses['where'] : '';
 			$groupby  = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';
@@ -2977,7 +2977,7 @@
 			 *
 			 * @since 3.1.0
 			 *
-			 * @param string[] $clauses {
+			 * @param string[] $pieces {
 			 *     Associative array of the clauses for the query.
 			 *
 			 *     @type string $where    The WHERE clause of the query.
@@ -2990,7 +2990,7 @@
 			 * }
 			 * @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( $pieces ), &$this ) );
 
 			$where    = isset( $clauses['where'] ) ? $clauses['where'] : '';
 			$groupby  = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';