Possible thread lockup due to AcidPtr?

[Walt Karas]

It looks to me like the AcidPtr docs need a prominent waring that a
thread should have two instances of these (or AcidCommitPtr) in
existence at the same time.  If the addresses of the two protected
objects hashed to the same mutex, wouldn't it cause the thread to lock
up (due to trying to lock the same mutex twice)?  If this did happen,
it would be very hard to debug.