This is still failing in tier4:

Error: incorrect monitor info: locked, a java.lang.Object, 0x000000078653eeb0
Expected: locked, a java.lang.Object, no object reference available

Looks like the presence/absence of an address is contingent on other things ??

"MyWaitingThread" #13 prio=5 os_prio=0 cpu=0.27ms elapsed=2.63s tid=0x00007f522c009000 nid=0x62d0 in Object.wait() [0x00007f526537d000]
   java.lang.Thread.State: WAITING (on object monitor)
Thread: 0x00007f522c009000 [0x62d0] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
   JavaThread state: _thread_blocked
at java.lang.Object.wait(java.base@12-internal/Native Method)
- waiting on <no object reference available>
at java.lang.Object.wait(java.base@12-internal/Object.java:328)
at WaitNotifyThreadTest$WaitThread.run(WaitNotifyThreadTest.java:80)
- locked <0x000000078653eeb0> (a java.lang.Object)

Or maybe there is a bug in the stack printing code thats printing the information?