From 3845929507f7d0bdfcb8db3e906471004e4bbffb Mon Sep 17 00:00:00 2001
From: Jitendra Purohit <jitendra@fuzion.co.nz>
Date: Fri, 1 Mar 2019 08:09:31 +0530
Subject: [PATCH] dev/core#768 - Fix fatal error on group search

---
 CRM/Contact/BAO/Query.php | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/CRM/Contact/BAO/Query.php b/CRM/Contact/BAO/Query.php
index cdd3f47618..ac81fec5bf 100644
--- a/CRM/Contact/BAO/Query.php
+++ b/CRM/Contact/BAO/Query.php
@@ -3013,10 +3013,13 @@ class CRM_Contact_BAO_Query {
       if (count($regularGroupIDs) > 1) {
         $op = strpos($op, 'IN') ? $op : ($op == '!=') ? 'NOT IN' : 'IN';
       }
-      $groupIds = CRM_Utils_Type::validate(
-        implode(',', (array) $regularGroupIDs),
-        'CommaSeparatedIntegers'
-      );
+      $groupIds = '';
+      if (!empty($regularGroupIDs)) {
+        $groupIds = CRM_Utils_Type::validate(
+          implode(',', (array) $regularGroupIDs),
+          'CommaSeparatedIntegers'
+        );
+      }
       $gcTable = "`civicrm_group_contact-" . uniqid() . "`";
       $joinClause = array("contact_a.id = {$gcTable}.contact_id");
 
-- 
2.25.1