Bug fix: CommitQuorum::addRequestActor() accesses self after destruction due to ignoring actor_cancelled error. (#5744)

fdbclient/PaxosConfigTransaction.actor.cpp

@@ -58,6 +58,11 @@ class CommitQuorum {
 			wait(retryBrokenPromise(cti.commit, self->getCommitRequest(generation)));
 			++self->successful;
 		} catch (Error& e) {
+			// self might be destroyed if this actor is canceled
+			if (e.code() == error_code_actor_cancelled) {
+				throw;
+			}
+
 			if (e.code() == error_code_not_committed) {
 				++self->failed;
 			} else {