[horde] Bug with Weather.php

[poubeline at free.fr]

Hi All, 

I am running a debian server that I just upgraded from jessie 8.9 to stretch 9.1 on which I have upgraded before the OS upgrade to the latest horde webmail stable version 5.2.21. 
I am using the mariaDB SQL database provided with the new Debian server as well as PHP 7.1 that I have activated after removal of the obsolete package PHP 5.6.30. 
Everything was fine on the server and i could access the server for normal usage or administration purpose without issues. 

As an admin, I was in Administration/Configuration and clicked on the link to check the latest versions of all the Horde packages. 
I was in the administration section, I have checked the latest versions of the packages and then did a 'pear install channel://pear.horde.org/horde_activesync-2.38.8' followed by a 'pear install --alldeps channel://pear.horde.org/Horde_Core-2.30.2'. 
The updated packages are : 
install ok: channel://pear.horde.org/Horde_Compress-2.2.1 
install ok: channel://pear.horde.org/Horde_Date-2.4.1 
install ok: channel://pear.horde.org/Horde_ActiveSync-2.38.8 
install ok: channel://pear.horde.org/Horde_Mime_Viewer-2.2.2 
install ok: channel://pear.horde.org/Horde_Imap_Client-2.29.15 
install ok: channel://pear.php.net/Archive_Tar-1.4.3 
install ok: channel://pear.php.net/XML_Util-1.4.2 
install ok: channel://pear.php.net/PEAR-1.10.5 
install ok: channel://pear.horde.org/Horde_Core-2.30.2 

I then clicked on the Horde 5.2.16 link to check some data and I got this error which prevent me from going further in the administration process : 

syntax error, unexpected 'new' (T_NEW) 
in /usr/share/php/Services/Weather.php:167 

1. Horde_Config_Form->__construct() /var/www/horde/admin/config/config.php:35 
2. Horde_Config->readXMLConfig() /usr/share/php/Horde/Config/Form.php:58 
3. Horde_Config->_parseLevel() /usr/share/php/Horde/Config.php:204 
4. Horde_Config->_parseLevel() /usr/share/php/Horde/Config.php:725 
5. Horde_Config->_parseLevel() /usr/share/php/Horde/Config.php:712 
6. Horde_Config->_getEnumValues() /usr/share/php/Horde/Config.php:602 
7. Horde_Config->_handleSpecials() /usr/share/php/Horde/Config.php:1803 
8. Horde_Registry->callAppMethod() /usr/share/php/Horde/Config.php:1874 
9. Horde_Application->configSpecialValues() /usr/share/php/Horde/Registry.php:1197 
10. Horde_Core_Block_Collection->getBlocksList() /var/www/horde/lib/Application.php:122 
11. Horde_Core_Block_Collection->_loadBlocks() /usr/share/php/Horde/Core/Block/Collection.php:159 
12. Horde_Block_Metar->__construct() /usr/share/php/Horde/Core/Block/Collection.php:500 
13. class_exists() /var/www/horde/lib/Block/Metar.php:21 
14. spl_autoload_call() 
15. Horde_Autoloader->loadClass() 
16. Horde_Autoloader->_include() /usr/share/php/Horde/Autoloader.php:65 

Do you have an idea of what is broken ? 

Can I revert to previous packages (i.e. uninstall the latests ones upgraded using channel://pear.horde.org) ? 

Thank you for your help.