Thanks a lot trendoman.
Ok.. so I have to wait for the fix.
then is it possible to import default empty database with tables as SQL file and thus avoid installation routine
Can you please elaborate a bit on this.. thanks a lot.
The installation routine I meant is the one which comes after placing all necessary files on server and reaching in browser /domain/couch-folder/ for the very first time. Couch presents a form to create a super-admin user.
What happens after we submit info has two parts - create couch tables in database, specified in config.php and create user with password. PhpMyAdmin or, better, HeidiSQL software can be used to observe tables in database and this first created superadmin user in table couch_users
if you specified prefix in config.php.
After the "installation" couch only writes/reads data from those tables as developer goes through the coding of templates etc.
If you can get a dump of that clean database and manually (using the software mentioned above) create new database, upload the dump -> then couch can work with it. This is what I meant as a way to overcome any current troubles with installation in php7 environment.