Sometimes, instances of SR have no stable matching. This occurs when any player has their preference list emptied; by being rejected by everyone in the first phase, or by being paired up with all of their remaining preferences in all-or-nothing cycles during the second phase.
This warning matching.exceptions.NoStableMatchingWarning rings when either of these things happen, but does not stop the algorithm from continuing until its natural termination.
Sometimes, instances of SR have no stable matching. This occurs when any player has their preference list emptied; by being rejected by everyone in the first phase, or by being paired up with all of their remaining preferences in all-or-nothing cycles during the second phase.
This warning
matching.exceptions.NoStableMatchingWarningrings when either of these things happen, but does not stop the algorithm from continuing until its natural termination.