Description:
Since update systemd-swap 4.1.0-1 -> 4.1.0-2 systemd-swap does not work anymore consuming 100% of one core permanently

Additional info:
* package version(s)
4.1.0-2
* config and/or log files etc.

journalctl -u systemd-swap
[code]
Jun 09 00:27:59 arch30 systemd[1]: Started Manage swap spaces on zram, files and partitions..
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Load: /etc/systemd/swap.conf
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Zswap: backup current configuration: start
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Zswap: backup current configuration: complete
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Zswap: set new parameters: start
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Zswap: Enable: 1, Comp: lz4, Max pool %: 25, Zpool: zbud
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: Zswap: set new parameters: complete
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: swapD: pickup devices from systemd-gpt-auto-generator
Jun 09 00:28:00 arch30 systemd-swap[704]: /usr/bin/systemd-swap: Zeile 78: read: 1s: Ungültige Wartezeitangebe.
Jun 09 00:28:00 arch30 systemd-swap[704]: /usr/bin/systemd-swap: Zeile 78: read: 1s: Ungültige Wartezeitangebe.
Jun 09 00:28:00 arch30 systemd-swap[704]: /usr/bin/systemd-swap: Zeile 78: read: 1s: Ungültige Wartezeitangebe.
Jun 09 00:28:00 arch30 systemd-swap[704]: /usr/bin/systemd-swap: Zeile 78: read: 1s: Ungültige Wartezeitangebe.
Jun 09 00:28:00 arch30 systemd-swap[545]: INFO: swapD: searching swap devices
Jun 09 00:28:00 arch30 systemd-swap[704]: /usr/bin/systemd-swap: Zeile 78: read: 1s: Ungültige Wartezeitangebe.
[/code]

the error message keeps continuing endlessly

Even with LC_ALL=C some output stays german language. (BTW 'Wartezeitangebe' should be 'Wartezeitangabe')

It says '/usr/bin/systemd-swap: row 78: read: 1s: invalid waiting time statement'


/etc/systemd/swap.conf:

################################################################################
# Defaults are optimized for general usage
################################################################################

################################################################################
# You can override any settings by files in:
# /etc/systemd/swap.conf.d/*.conf
################################################################################

################################################################################
# Zswap
#
# Kernel >= 3.11
# Zswap create compress cache between swap and memory for reduce IO
# https://www.kernel.org/doc/Documentation/vm/zswap.txt

zswap_enabled=1
zswap_compressor=lz4 # lzo lz4
zswap_max_pool_percent=25 # 1-99
zswap_zpool=zbud # zbud z3fold

################################################################################
# ZRam
#
# Kernel >= 3.15
# Zram compression streams count for additional information see:
# https://www.kernel.org/doc/Documentation/blockdev/zram.txt

zram_enabled=0
zram_size=$(($RAM_SIZE/4)) # This is 1/4 of ram size by default.
zram_streams=$NCPU
zram_alg=lz4 # lzo lz4 deflate lz4hc 842 - for Linux 4.8.4
zram_prio=32767 # 1 - 32767

################################################################################
# Swap File Chunked
# Allocate swap files dynamically
# For btrfs fallback to swapfile + loop will be used
# ex. Min swap size 512M, Max 8*512M
swapfc_enabled=1
swapfc_force_use_loop=0 # Force usage of swapfile + loop
swapfc_frequency=1s # How often check free swap space
swapfc_chunk_size=512M # Allocate size of swap chunk
swapfc_max_count=8 # 0 - unlimited, note: 32 is a kernel maximum
swapfc_free_swap_perc=15 # Add new chunk if free < 15%
# Remove chunk if free > 15+40% & chunk count > 2
swapfc_path=/var/lib/systemd-swap/swapfc/
# Only for swapfile + loop
swapfc_nocow=1 # Disable CoW on swapfile
swapfc_directio=1 # Use directio for loop dev
swapfc_force_preallocated=0 # Will preallocate created files

################################################################################
# Swap devices
# Find and auto swapon all available swap devices
swapd_auto_swapon=1
swapd_prio=1024


* link to upstream bug report, if any

- not found

Steps to reproduce:

On system using systemd-swap:
Update systemd-swap (4.0.1-2 -> 4.1.0-1)
reboot

Downgrading fixes the issue