Hi, I messed a lot with kstars/ekos on ArchLinux and I think I know why these errors happen (I opened the thread you linked).
These errors seem to come from the c++ code itself, archlinux uses by default a lot of flags to compile packages with optimization, if you drop most of them the package will compile without causing Kstars to crash.

Also, if this of any interest to you github.com/devDucks/astroarch

I mantain some astropackages in a repo I made, those should work with no issue

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