change_url fails

[tituspijean]

OK. What was working while testing fails in master. Great.
While trying to change the url of a forum under /forum, to /flarim:

location "/forum/" is outside location "/flarim" in /etc/nginx/conf.d/ynh.local.d/flarum.conf:12

In flarum.conf, location is correctly altered, but the rest is not:

location ^~ /flarim {

    if ($scheme = http) {
                rewrite ^ https://$server_name$request_uri? permanent;
    }

    alias /var/www/flarum/;
    try_files $uri $uri/ /index.php?$query_string;
    index /forum/index.php;

    # Bug in Nginx with locations and aliases (see http://stackoverflow.com/a/35102259 )
    location /forum/ { try_files $uri $uri/ /forum/forum/index.php?$query_string; }
    location /forum/api { try_files $uri $uri/ /forum/forum/api.php?$query_string; }
    location /forum/admin { try_files $uri $uri/ /forum/forum/admin.php?$query_string; }

    location /forum/flarum/ {
        deny all;
        return 404;
    }

[tituspijean]

⚠️ flarum.conf has not been restored after this failed change. nginx stays down, manual correction is needed.

[tituspijean]

Mea culpa, I tested this on two altered apps, used during development of this feature. No problem using a freshly installed app.