Presumably the change the makes j.l.concurrent use VarHandles introduced other failure modes for the infinite recursion this test is trying to do.

java.lang.LinkageError
at java.lang.invoke.MethodHandleNatives.linkMethodImpl(java.base@9-internal/MethodHandleNatives.java:386)
at java.lang.invoke.MethodHandleNatives.linkMethod(java.base@9-internal/MethodHandleNatives.java:366)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.compareAndSetState(java.base@9-internal/AbstractQueuedSynchronizer.java:600)
at java.util.concurrent.locks.ReentrantLock$Sync.nonfairTryAcquire(java.base@9-internal/ReentrantLock.java:130)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.tryAcquire(java.base@9-internal/ReentrantLock.java:199)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(java.base@9-internal/AbstractQueuedSynchronizer.java:1225)
at java.util.concurrent.locks.ReentrantLock.lock(java.base@9-internal/ReentrantLock.java:267)
at ReservedStackTest$ReentrantLockTest.lockAndCall(ReservedStackTest.java:168)
at ReservedStackTest$ReentrantLockTest.lockAndCall(ReservedStackTest.java:169)
at ReservedStackTest$ReentrantLockTest.lockAndCall(ReservedStackTest.java:169)
at ReservedStackTest$ReentrantLockTest.lockAndCall(ReservedStackTest.java:169)
at ReservedStackTest$ReentrantLockTest.lockAndCall(ReservedStackTest.java:169)