Description:

The systemd-swap service fails after upgrading to 4.2.3-1. This is caused by broken files:
- /usr/bin/systemd-swap
- /usr/lib/systemd/system/systemd-swap.service file

Additional info:
* package version(s)

$ pacman -Q systemd-swap
systemd-swap 4.2.3-1

* config and/or log files etc.


$ systemctl status systemd-swap
● systemd-swap.service - Manage swap spaces on zram, files and partitions....
Loaded: loaded (/usr/lib/systemd/system/systemd-swap.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2020-06-26 15:07:33 CEST; 3min 2s ago
Main PID: 717 (code=exited, status=1/FAILURE)

Jun 26 15:07:32 lab16 systemd[1]: Starting Manage swap spaces on zram, files and partitions....
Jun 26 15:07:33 lab16 systemd-swap[717]: /usr/bin/systemd-swap: line 180: /build/systemd-swap/pkg/systemd-swap/usr/share/systemd-swap/swap-default.conf: No such file or directory
Jun 26 15:07:33 lab16 systemd-swap[717]: ERRO: Error loading /build/systemd-swap/pkg/systemd-swap/usr/share/systemd-swap/swap-default.conf
Jun 26 15:07:33 lab16 systemd[1]: systemd-swap.service: Main process exited, code=exited, status=1/FAILURE
Jun 26 15:07:33 lab16 systemd[1]: systemd-swap.service: Failed with result 'exit-code'.
Jun 26 15:07:33 lab16 systemd[1]: Failed to start Manage swap spaces on zram, files and partitions..

$ cat /usr/lib/systemd/system/systemd-swap.service
[Unit]
Description=Manage swap spaces on zram, files and partitions.

[Service]
Type=notify
NotifyAccess=exec
ExecStart=/build/systemd-swap/pkg/systemd-swap/usr/bin/systemd-swap start
ExecStop=/build/systemd-swap/pkg/systemd-swap/usr/bin/systemd-swap stop
RemainAfterExit=true
TimeoutStopSec=600
OOMScoreAdjust=-1000
CPUSchedulingPolicy=fifo
CPUSchedulingPriority=20
CapabilityBoundingSet=CAP_SYS_ADMIN CAP_SYS_MODULE
DeviceAllow=block-zram rw
DeviceAllow=block-sd r
DeviceAllow=block-blkext r
IPAddressDeny=any
NoNewPrivileges=true
PrivateNetwork=true
PrivateTmp=true
ProtectClock=true
ProtectControlGroups=true
ProtectHome=read-only
ProtectHostname=true
ProtectKernelLogs=true
ProtectSystem=full
RestrictAddressFamilies=AF_UNIX
RestrictNamespaces=true
RestrictSUIDSGID=true
SystemCallArchitectures=native
SystemCallFilter=@system-service @swap @module

[Install]
WantedBy=multi-user.target

$ grep /build/systemd-swap/pkg/systemd-swap /usr/bin/systemd-swap
readonly ETC_SYSD="/build/systemd-swap/pkg/systemd-swap/etc/systemd"
readonly VEN_SYSD="/build/systemd-swap/pkg/systemd-swap/usr/lib/systemd"
readonly DEF_CONFIG="/build/systemd-swap/pkg/systemd-swap/usr/share/systemd-swap/swap-default.conf"


* link to upstream bug report, if any

Haven't had the time to check upstream.

Steps to reproduce:

(1) install/upgrade systemd-swap
(2) start the service

Removing "/build/systemd-swap/pkg/systemd-swap" from both files restores regular functionality.