Arch Linux

Since last update (php-fpm v7.4.0-2), I cannot start php-fpm.
I use the default configuration.

# systemctl start php-fpm
Job for php-fpm.service failed because the control process exited with error code.
See "systemctl status php-fpm.service" and "journalctl -xe" for details.

# systemctl status php-fpm.service
● php-fpm.service - The PHP FastCGI Process Manager
Loaded: loaded (/usr/lib/systemd/system/php-fpm.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sat 2019-11-30 15:12:36 CET; 27s ago
Process: 5901 ExecStart=/usr/bin/php-fpm --nodaemonize --fpm-config /etc/php/php-fpm.conf (code=exited, status=78)
Main PID: 5901 (code=exited, status=78)

Nov 30 15:12:35 alpenglow.slaanesh.org systemd[1]: Starting The PHP FastCGI Process Manager...
Nov 30 15:12:36 alpenglow.slaanesh.org php-fpm[5901]: [ERROR] [pool www] failed to chown() the socket '/run/php-fpm/php-fpm.sock': Operation not permitted (1)
Nov 30 15:12:36 alpenglow.slaanesh.org php-fpm[5901]: [ERROR] [pool www] failed to chown() the socket '/run/php-fpm/php-fpm.sock': Operation not permitted (1)
Nov 30 15:12:36 alpenglow.slaanesh.org php-fpm[5901]: [ERROR] FPM initialization failed
Nov 30 15:12:36 alpenglow.slaanesh.org php-fpm[5901]: [ERROR] FPM initialization failed
Nov 30 15:12:36 alpenglow.slaanesh.org systemd[1]: php-fpm.service: Main process exited, code=exited, status=78/CONFIG
Nov 30 15:12:36 alpenglow.slaanesh.org systemd[1]: php-fpm.service: Failed with result 'exit-code'.
Nov 30 15:12:36 alpenglow.slaanesh.org systemd[1]: Failed to start The PHP FastCGI Process Manager.

# ls -la /run/php-fpm/php-fpm.sock
srw-rw---- 1 root root 0 Nov 30 15:12 /run/php-fpm/php-fpm.sock