Daemon not start on Arch Linux

[MUETTO]

[lb@vm ~]$ uname -a
Linux vm 6.1.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Tue, 24 Jan 2023 21:07:04 +0000 x86_64 GNU/Linux
[lb@vm ~]$

[lb@vm ~]$ llk
/usr/include/c++/12.2.1/bits/basic_string.h:1221: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; reference = char&; size_type = long unsigned int]: Assertion '__pos <= size()' failed.
/etc/logkeys-start.sh: line 2: 9492 Aborted (core dumped) logkeys --start
[lb@vm ~]$

[lb@vm ~]$ systemctl status logkeys.service
× logkeys.service - Keylogger daemon
Loaded: loaded (/usr/lib/systemd/system/logkeys.service; disabled; preset: disabled)
Active: failed (Result: core-dump) since Fri 2023-02-03 23:02:20 CET; 20s ago
Process: 9605 ExecStart=/usr/bin/logkeys --start $LOGKEYS_PARAMS (code=dumped, signal=ABRT)
CPU: 7ms

Feb 03 23:02:20 vm systemd[1]: Starting Keylogger daemon...
Feb 03 23:02:20 vm logkeys[9605]: /usr/include/c++/12.2.1/bits/basic_string.h:1221: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator [with _CharT >
Feb 03 23:02:20 vm systemd[1]: logkeys.service: Control process exited, code=dumped, status=6/ABRT
Feb 03 23:02:20 vm systemd[1]: logkeys.service: Failed with result 'core-dump'.
Feb 03 23:02:20 vm systemd[1]: Failed to start Keylogger daemon.

[lb@vm ~]$ journalctl -xeu logkeys.service
Feb 03 23:02:20 vm systemd[1]: Starting Keylogger daemon...
Subject: A start job for unit logkeys.service has begun execution
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

A start job for unit logkeys.service has begun execution.

The job identifier is 1759.
Feb 03 23:02:20 vm logkeys[9605]: /usr/include/c++/12.2.1/bits/basic_string.h:1221: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator [with _CharT >
Feb 03 23:02:20 vm systemd[1]: logkeys.service: Control process exited, code=dumped, status=6/ABRT
Subject: Unit process exited
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

An ExecStart= process belonging to unit logkeys.service has exited.

The process' exit code is 'dumped' and its exit status is 6.
Feb 03 23:02:20 vm systemd[1]: logkeys.service: Failed with result 'core-dump'.
Subject: Unit failed
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

The unit logkeys.service has entered the 'failed' state with result 'core-dump'.
Feb 03 23:02:20 vm systemd[1]: Failed to start Keylogger daemon.
Subject: A start job for unit logkeys.service has failed
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

A start job for unit logkeys.service has finished with a failure.

The job identifier is 1759 and the job result is failed.
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[icaroerasmo]

I was able to make it run as a daemon following this guide: https://www.vivaolinux.com.br/dica/rclocal-no-Arch-Linux

It's in portuguese. Try to translate it using google or something else. In summary what it does is activate local.rc script and you can put logkeys startup comand there.