Default java opts assumes a minimum Java version

[nafg]

I'm referring to

bloop-core/bloop-rifle/src/bloop/rifle/BloopRifleConfig.scala

Line 78 in 3dca45b

"-XX:+UseZGC", // ZGC returns unused memory back to the OS, so Bloop does not occupy so much memory if unused

For instance, on Java 11 it will fail with:

Error: VM option 'UseZGC' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.
Error: The unlock option must precede 'UseZGC'.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

I didn't try on earlier JDKs but it will probably fail altogether.

[oyvindberg]

Note that JVMs older than 17 (IIRC) are not supported by this bloop