add a JDK 16 build

[SethTisue]

It's time!

I'm not sure we really have enough space/inodes for this, but let's find out. The worst that can happen is we trigger runs manually from time to time, rather than running them daily, until we can either get more space or maybe ditch the 15 build.

The current JDK 16 build is "Build 34 (2021/1/27)".

• on all 3 behemoths:
  • cd /usr/lib/jvm
  • sudo curl -O -L 'https://download.java.net/java/early_access/jdk16/34/GPL/openjdk-16-ea+34_linux-x64_bin.tar.gz'
  • sudo dtrx -n openjdk-16-ea+34_linux-x64_bin.tar.gz
  • sudo rm openjdk-16-ea+34_linux-x64_bin.tar.gz
  • sudo chmod -R go+rX openjdk-16-ea+34_linux-x64_bin
  • sudo ln -s openjdk-16-ea+34_linux-x64_bin java-16-openjdk-x64
  • ./java-16-openjdk-x64/jdk-16/bin/java -version
• add -jdk16- jobs (on 2.12.x and 2.13.x) with JDK version set appropriately
• make sure both jobs have at least a green core
• update scripts/Report.scala (both branches)
• open a separate ticket on gradually getting more projects green?

[SethTisue]

first runs:

• https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk16-integrate-community-build/1/
• https://scala-ci.typesafe.com/view/scala-2.13.x/job/scala-2.13.x-jdk16-integrate-community-build/1/

[SethTisue]

everything extracts... that's encouraging

[SethTisue]

a number of projects are green

a number of projects have failures, so it seems this won't be entirely smooth sailing

but we don't even have a full scorecard yet, because something in airframe is failing so hard (every time) that it takes dbuild down with it. I'll have to dig into it

[SethTisue]

whatever is happening with airframe doesn't happen for me locally, so for now I made branches where airframe isn't present so I can make progress on more fundamental stuff first

• https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk16-integrate-community-build/5/console
• https://scala-ci.typesafe.com/job/scala-2.13.x-jdk16-integrate-community-build/7/console

[SethTisue]

tons of projects are green on both branches, so that's great.

the top failure on 2.12 is:

• [utest] [error] java.lang.IllegalArgumentException: Unsupported class file major version 60

looks we need an ASM upgrade: scala/bug#12328

[SethTisue]

basics are in place. sequel ticket on getting more green is #1354