LP #143391: Protect against missing acl_users.hasUsers on quick start page.

doc/CHANGES.rst

@@ -144,6 +144,8 @@ Features Added
 Bugs Fixed
 ++++++++++
 
+- LP #143391: Protect against missing acl_users.hasUsers on quick start page.
+
 - Fixed issue with sending text containing ':' from MailHost.
 
 - MailHost will now ensure the headers it sets are 7bit.

src/App/dtml/zope_quick_start.dtml

@@ -10,7 +10,7 @@
            form_title='Zope Quick Start',
            )">
 
-<dtml-if expr="not PARENTS[0].acl_users.hasUsers()">
+<dtml-if expr="_.hasattr (PARENTS[0].acl_users, 'hasUsers') and not PARENTS[0].acl_users.hasUsers()">
 <div class="system-msg">
 <h3>
 You have not created any users in this Zope instance.  In order to