[Jepsen] Couchbase crash during swap-rebalance nemesis due to an item being uncommitted in processSet()

During kv-engine-jepsen-nightly-351 we observed a and crash during the following test:
lein trampoline run test --nodes-file ./nodes --username vagrant --ssh-private-key ./resources/vagrantkey --workload=rebalance --scenario=swap-rebalance --no-autofailover --replicas=2 --disrupt-count=1 --kv-timeout=30 --durability=0:0:0:100 --use-json-docs --doc-padding-size=4096 --enable-tcp-capture --hashdump --enable-memcached-debug-log-level
Crash Message:

2019-12-07T06:07:09.270558+00:00 CRITICAL Caught unhandled std::exception-derived exception. what(): GSL: Precondition failure at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucket.cc: 3180

        Expects(itm.isCommitted());

        getPassiveDM().completeSyncWrite(

                itm.getKey(),

                PassiveDurabilityMonitor::Resolution::Commit,

                v->getBySeqno() /* prepareSeqno */);

Couchbase version 6.5.1-6000