Werk #14321: Fix possible TypeError when using views with group painter

Component User interface
Title Fix possible TypeError when using views with group painter
Date May 27, 2022
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.1.0p1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Opening of views with group painters (Option "Grouping" on view edit page) could result in the error TypeError: <lambda>() takes 2 positional arguments but 3 were given.

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