It says the crash is in Adorn's entrypoint but I don't think that's actually the root cause, looking at the stack trace. It doesn't crash when used with Java 8.

https://paste.2x.ax/~saiko/e268bf2ef1c8e6200933770cf7e85abb16a177ca

Working Java version:

openjdk version "1.8.0_252"
OpenJDK Runtime Environment (IcedTea 3.16.0) (Gentoo icedtea-3.16.0)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

Broken Java version:

openjdk version "14.0.2" 2020-07-14
OpenJDK Runtime Environment 14.0.2_p12 (build 14.0.2+12)
OpenJDK 64-Bit Server VM 14.0.2_p12 (build 14.0.2+12, mixed mode, sharing)

very odd.

It seems that it's kotlin-reflect being broken and getting used in the Kotlin language adapter. I'll switch to the default adapter in Adorn for now.

i need better testing and actually install java 14 on my system