Unable to run _ByValue example

[Boaz Nahum]

(last pull valhalla today)
Trying this:

public final __ByValue class Point {
    final int x;
    final int y;
    Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public static void main(String[] args) {
        Point p = __Make Point(5, 6);
    }
}

(Compile file directly with bin/javac.exe not using IntelliJ)

When trying to run:

F:\Dev\JDKBuild\valhalla\build\windows-x86_64-normal-server-release\images\jdk\bin\java
-cp F:\Dev\IntelliJProjectsOut\LearnJDK10\production\LearnJDK10
by_val.Point
java.lang.ClassFormatError: Method "<vminit>" in class by_val/Point
has illegal signature "(II)Qby_val/Point;"
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:759)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:835)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:184)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:547)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:87)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:413)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:397)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:396)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:262)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:503)
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main"
Process finished with exit code 1

Thx
Boaz