Взял rc7 - одна ошибка убралась:
Compiling org.graalvm.compiler.lir.sparc with javac-daemon(JDK 1.8)... [dependency org.graalvm.compiler.asm.sparc updated]
/media/data/java/OpenJDK/GraalVM/graal/truffle/src/com.oracle.truffle.polyglot/src/com/oracle/truffle/polyglot/PolyglotImpl.java:104: error: PolyglotImpl is not abstract and does not override abstract method buildEngine(OutputStream,OutputStream,InputStream,Map<String,String>,long,TimeUnit,boolean,long,boolean,boolean,Handler) in AbstractPolyglotImpl
public final class PolyglotImpl extends AbstractPolyglotImpl {
^
/media/data/java/OpenJDK/GraalVM/graal/truffle/src/com.oracle.truffle.polyglot/src/com/oracle/truffle/polyglot/PolyglotImpl.java:161: error: method does not override or implement a method from a supertype
@Override ^
2 errors