Werk #13990: Fix systemd_units check plugin crash on certain initial line characters

Component Checks & agents
Title Fix systemd_units check plugin crash on certain initial line characters
Date Jun 22, 2022
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.2.0i1 2.1.0p4
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

In some cases, the plugin systemd_units crashed when parsing raw agent data. In such cases, the Check_MK Discovery service reported "Parsing of section systemd_units failed" and went WARNING. The error message in the corresponding crash report was:

IndexError (list index out of range)

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