the change to shareable thunks also removed a few cases of pointer
equality checks that allowed structures containing functions to be
considered equal to other sets containing the same functions, even
if the sets themselves were pointer-equal themselves. *so* busted.
Change-Id: If87fdab658f9037ce2a654f69a9e3da6ae2f53e5
eldritch horrors
2fa40c9de4