These four JCK lang tests fail with unexpected IllegalAccessError exceptions when run in the Valhalla nestmates repo:

    lang/LMBD/lmbd174/lmbd17402m2001/lmbd17402m2001_rt
    lang/LMBD/lmbd174/lmbd17402m21111/lmbd17402m21111_rt
    lang/LMBD/lmbd174/lmbd17402m1011/lmbd17402m1011_rt
    lang/LMBD/lmbd174/lmbd17402m31011/lmbd17402m31011_rt

Typical failure message is:

failure: unexpectedly method reference evaluation has thrown IllegalAccessError:
java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at javasoft.sqe.tests.lang.lmbd174.lmbd17402m1011.lmbd17402m1011.run(lmbd17402m1011.java:35)
                     ...
Caused by: java.lang.IllegalAccessError: class javasoft.sqe.tests.lang.lmbd174.lmbd17402m1011.MethodInvoker$$Lambda$126\\168 tried to access protected method 'java.lang.String javasoft.sqe.tests.lang.lmbd174.lmbd17402m1011.anotherpkg.MethodSupplierOuter$MethodSupplier.m(java.lang.Object, java.lang.Object, java.lang.Object)' (javasoft.sqe.tests.lang.lmbd174.lmbd17402m1011.MethodInvoker$$Lambda$126\\168 and javasoft.sqe.tests.lang.lmbd174.lmbd17402m1011.anotherpkg.MethodSupplierOuter$MethodSupplier are in unnamed module of loader java.net.URLClassLoader @4ea2e4ff)