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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 Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.1.0p1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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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