Hi Marc-Étienne, Yes, I have the HEAD of trunk running locally, with my patch; I haven't tried any specific version. I run php7, so I also had to make other changes to get it to work – but on php 5.x, it seems to work ok with just this patch. I have issues with the time it takes to re-upload a dump of my old wiki, but that's not related to the backend, it seems. Regards, Sébastien.
Fix for PDO backend issues