Hi all, As of https://github.com/graalvm/graal-core/commit/be67a0e8c94ae01f7076bd76d244d84b120c571f, Graal works with build 143 or later of a JDK9 Early Access Release[1]. Please file issues at https://github.com/graalvm/graal-core/issues if you run into problem running Graal on JDK9. -Doug [1] https://jdk9.java.net/download/