Update from Mac OS Sierra to High Sierra causes App to crash
An app terminating with signal 11 (SIGSEGV, segmentation fault) is usually an indication of bad memory access in the application code. It's very likely a bug. Your best bet is to file a bug with Apple via their online bug reporter:
https://bugreport.apple.com/

Alternatively, if you can find a reproducer that points to a bug outside of macOS, you could try filing a bug report directly against libressl: http://www.libressl.org