Comment 3 for bug 1789283

I did some Google research and apparently this is a well known problem on Fedora 28, and not specific to KiCad. Hardening flags were added to the default build parameters, including _GLIBCXX_ASSERTIONS, which "turns on cheap range checks for C++ arrays, vectors, and strings" [1].

There is a minimal example how to trigger (and fix) this problem in the httpuv bug tracker [2]. Maybe this can help to fix this bug in KiCad as well.

[1] https://fedoraproject.org/wiki/Changes/HardeningFlags28
[2] https://github.com/rstudio/httpuv/issues/133#issuecomment-387499519