Werk #16469: Fix crash on invalid regex in filters

Component User interface
Title Fix crash on invalid regex in filters
Date Jan 30, 2024
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.1.0p39 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When an invalid regex was entered in a regex filter (like service or hostname) a livestatus error was caused. Instead, a warning will now be displayed.

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