Hello Solus community,
today I have installed kicad 5.1.6 from the Solus repository and encountered a version mismatch error:
Fatal Error: Mismatch between the program and library build versions detected. The library used 3.0 (wchar_t,compiler with C++ ABI 1013,wx containers,compatible with 2.8), and your program used 3.0 (wchar_t,compiler with C++ ABI 1002,wx containers,compatible with 2.8).  18069 abort (core dumped) kicad
A rebuild of 5.1.6 nor an update to 5.1.8 have resolved the issue.
If it is not a Solus problem, I will go to the KiCAD bug tracker.