It's kind of comical that a test named IncompatibleOptions.java fails with incompatible options :-)

The problem is that OpenJDK does not enable ZGC by default:

checking user specified JVM feature list...
checking if zgc should be built... no

but the test assumes it's available on linux-x64.

I think Oracle's internal builds are fine because of this in make/conf/jib-profiles.js:

    // Enable ZGC in linux-x64-open builds
    [ "linux-x64-open" ].forEach(function (name) {
        var configureArgs = { configure_args: [ "--with-jvm-features=zgc" ] };