Investigate benefits of upgrading & possibly upgrade to GraalVM 20.3

[viktorklang]

https://www.graalvm.org/release-notes/20_2/#2020

[viktorklang]

This version seems to address this issue that we were seeing: oracle/graal#1306 (comment)

[wololock]

@viktorklang, try out GraalVM CE 20.2.0 (build 11.0.8+10-jvmci-20.2-b03) specifically. I did run my Groovy examples using the newest GraalVM CE 20.2.0 (build 25.262-b10-jvmci-20.2-b03, mixed mode) - the OpenJDK 8u262 one, and it still does not work. I hope it works for you :)

[viktorklang]

Thanks for the tip, @wololock! 👍

[viktorklang]

Worth tracking: oracle/graal#2761

[viktorklang]

This issue of ours seem to have been recently closed:

oracle/graal#2736
oracle/graal#2369

[viktorklang]

Graalvm 20.3 has been released: https://www.graalvm.org/release-notes/20_3/

[pvlugter]

Minimal upgrade to 20.3.1 in #519. Leaving this issue open for any follow-ups and looking at upgrading to version 21.0.