ide as of this writing. But this technicality is irrelevant: unlinking the SHM-pool doesn't blow up the other side's access to the arena; it remains in RAM until that guy closes. So just bear with us here.) Then indeed B dtor can run sometime later. Is there a problem? For SHM-classic, which is what we're discussing, no: The arena &ndash; 1 shared SHM-pool in this case &ndash; stays alive, until B's handle gets closed by B dtor. What about allocations/deallocations? No problem there either: By contract, the