package redis-server 5:4.0.8-2 failed to install/upgrade: installed redis-server package post-installation script subprocess returned error exit status 1

More info:

```
chrism  ~  ls /var/run/redis/
 chrism  ~  sudo systemctl start redis
Job for redis-server.service failed because a timeout was exceeded.
See "systemctl status redis-server.service" and "journalctl -xe" for details.
 chrism  ~  journalctl -xe
-- The result is RESULT.
Feb 27 20:18:40 bionictest sudo[30491]: pam_unix(sudo:session): session closed f
Feb 27 20:18:40 bionictest systemd[1]: redis-server.service: Service hold-off ti
Feb 27 20:18:40 bionictest systemd[1]: redis-server.service: Scheduled restart j
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit redis-server.service has been scheduled, as
-- the configured Restart= setting for the unit.
Feb 27 20:18:40 bionictest systemd[1]: Stopped Advanced key-value store.
-- Subject: Unit redis-server.service has finished shutting down
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit redis-server.service has finished shutting down.
Feb 27 20:18:40 bionictest systemd[1]: Starting Advanced key-value store...
-- Subject: Unit redis-server.service has begun start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit redis-server.service has begun starting up.
Feb 27 20:18:40 bionictest systemd[1]: redis-server.service: Can't open PID file
```

Moar:

```
root@bionictest:/var/log/redis# tail redis-server.log
30526:C 27 Feb 20:18:40.937 # Configuration loaded
30527:M 27 Feb 20:18:40.938 # Creating Server TCP listening socket ::1:6379: bind: Cannot assign requested address
30868:C 27 Feb 20:20:11.428 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
30868:C 27 Feb 20:20:11.428 # Redis version=4.0.8, bits=64, commit=00000000, modified=0, pid=30868, just started
30868:C 27 Feb 20:20:11.428 # Configuration loaded
30869:M 27 Feb 20:20:11.429 # Creating Server TCP listening socket ::1:6379: bind: Cannot assign requested address
31269:C 27 Feb 20:21:41.977 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
31269:C 27 Feb 20:21:41.977 # Redis version=4.0.8, bits=64, commit=00000000, modified=0, pid=31269, just started
31269:C 27 Feb 20:21:41.977 # Configuration loaded
31279:M 27 Feb 20:21:41.978 # Creating Server TCP listening socket ::1:6379: bind: Cannot assign requested address
```

I had ipv6 disabled on my network interface. Reenabling it allowed redis to start up fine.

Status changed to 'Confirmed' because the bug affects multiple users.

Related to ipv6 (disabled on the server)

Replaced

bind 127.0.0.1 ::1

by

bind 127.0.0.1

This bug also affects redis-server 5:4.0.9-1 under Ubuntu 18.04.1.

Any chance the fix for this can be cherry-picked in bionic?
https://github.com/antirez/redis/commit/afc4b36c1026a4fab0e6c50af09c6bd18adc17d5