From a36f32b7583f89143365a6c1c6cce6ab7f38ef46 Mon Sep 17 00:00:00 2001
From: Coleman Watts <coleman@civicrm.org>
Date: Sun, 5 Apr 2020 10:05:21 -0400
Subject: [PATCH] Fix multiselect/checkbox custom field defaults on
 registration profile

The CRM_Core_BAO_UFGroup::setProfileDefaults() function expects each field to be an array,
but this function was just passing it the number 1. So it did not have enough field metadata
to correctly format each value.
---
 CRM/Event/BAO/Participant.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CRM/Event/BAO/Participant.php b/CRM/Event/BAO/Participant.php
index 8117991b40..64b2f806ce 100644
--- a/CRM/Event/BAO/Participant.php
+++ b/CRM/Event/BAO/Participant.php
@@ -1858,13 +1858,13 @@ WHERE    civicrm_participant.contact_id = {$contactID} AND
     if (!empty($form->_fields)) {
       $removeCustomFieldTypes = ['Participant'];
 
-      foreach ($form->_fields as $name => $dontCare) {
+      foreach ($form->_fields as $name => $fieldInfo) {
         if ((substr($name, 0, 7) == 'custom_' && !$form->_allowConfirmation
           && !CRM_Core_BAO_CustomGroup::checkCustomField(substr($name, 7), $removeCustomFieldTypes))
           || substr($name, 0, 12) == 'participant_') {
           continue;
         }
-        $fields[$name] = 1;
+        $fields[$name] = $fieldInfo;
       }
 
       if (!empty($fields)) {
-- 
2.25.1