diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 99674382ef..c617bfa021 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -116,22 +116,22 @@ class WP_Comments_List_Table extends WP_List_Table {
 		);
 
 		$_comments = get_comments( $args );
+		if ( is_array( $_comments ) ) {
+			update_comment_cache( $_comments );
 
-		update_comment_cache( $_comments );
+			$this->items = array_slice( $_comments, 0, $comments_per_page );
+			$this->extra_items = array_slice( $_comments, $comments_per_page );
 
-		$this->items = array_slice( $_comments, 0, $comments_per_page );
-		$this->extra_items = array_slice( $_comments, $comments_per_page );
+			$_comment_post_ids = array_unique( wp_list_pluck( $_comments, 'comment_post_ID' ) );
 
-		$total_comments = get_comments( array_merge( $args, array('count' => true, 'offset' => 0, 'number' => 0) ) );
-
-		$_comment_post_ids = array();
-		foreach ( $_comments as $_c ) {
-			$_comment_post_ids[] = $_c->comment_post_ID;
+			$this->pending_count = get_pending_comments_num( $_comment_post_ids );
 		}
 
-		$_comment_post_ids = array_unique( $_comment_post_ids );
-
-		$this->pending_count = get_pending_comments_num( $_comment_post_ids );
+		$total_comments = get_comments( array_merge( $args, array(
+			'count' => true,
+			'offset' => 0,
+			'number' => 0
+		) ) );
 
 		$this->set_pagination_args( array(
 			'total_items' => $total_comments,
diff --git a/src/wp-admin/includes/dashboard.php b/src/wp-admin/includes/dashboard.php
index 7179aa3480..6078353450 100644
--- a/src/wp-admin/includes/dashboard.php
+++ b/src/wp-admin/includes/dashboard.php
@@ -766,6 +766,9 @@ function wp_dashboard_recent_comments( $total_items = 5 ) {
 		$comments_query['status'] = 'approve';
 
 	while ( count( $comments ) < $total_items && $possible = get_comments( $comments_query ) ) {
+		if ( ! is_array( $possible ) ) {
+			break;
+		}
 		foreach ( $possible as $comment ) {
 			if ( ! current_user_can( 'read_post', $comment->comment_post_ID ) )
 				continue;
diff --git a/src/wp-includes/class-wp-xmlrpc-server.php b/src/wp-includes/class-wp-xmlrpc-server.php
index eb4950d985..3fa3eb0a34 100644
--- a/src/wp-includes/class-wp-xmlrpc-server.php
+++ b/src/wp-includes/class-wp-xmlrpc-server.php
@@ -3196,12 +3196,13 @@ class wp_xmlrpc_server extends IXR_Server {
 		if ( isset($struct['number']) )
 			$number = absint($struct['number']);
 
-		$comments = get_comments( array('status' => $status, 'post_id' => $post_id, 'offset' => $offset, 'number' => $number ) );
+		$comments = get_comments( array( 'status' => $status, 'post_id' => $post_id, 'offset' => $offset, 'number' => $number ) );
 
 		$comments_struct = array();
-
-		foreach ( $comments as $comment ) {
-			$comments_struct[] = $this->_prepare_comment( $comment );
+		if ( is_array( $comments ) ) {
+			foreach ( $comments as $comment ) {
+				$comments_struct[] = $this->_prepare_comment( $comment );
+			}
 		}
 
 		return $comments_struct;
diff --git a/src/wp-includes/default-widgets.php b/src/wp-includes/default-widgets.php
index 2416b5bbc7..55a7782d0f 100644
--- a/src/wp-includes/default-widgets.php
+++ b/src/wp-includes/default-widgets.php
@@ -1009,7 +1009,7 @@ class WP_Widget_Recent_Comments extends WP_Widget {
 		}
 
 		$output .= '<ul id="recentcomments">';
-		if ( $comments ) {
+		if ( is_array( $comments ) && $comments ) {
 			// Prime cache for associated posts. (Prime post term cache if we need it for permalinks.)
 			$post_ids = array_unique( wp_list_pluck( $comments, 'comment_post_ID' ) );
 			_prime_post_caches( $post_ids, strpos( get_option( 'permalink_structure' ), '%category%' ), false );