Please answer these questions before submitting your issue. Thanks!

What version of Cassandra are you using?

[cqlsh 5.0.1 | Cassandra 3.10 | CQL spec 3.4.4 | Native protocol v4]

What version of Gocql are you using?

{
	"ImportPath": "github.com/gocql/gocql",
	"Comment": "pre-node-events-568-gaa93acc",
	"Rev": "aa93acc8f067e9233982b9a7de370e4d64b9c33e"
}

What did you do?

a = make([]A, iter.NumRows())
var i := 0
for iter.MapScan(m) {
    j, err := json.Marshal(m)
    err = json.Unmarshal(j, &a[i])
    i++
}

What did you expect to see?

Code should not panic since number of rows should be equal to number of elements in mapscan

What did you see instead?

Panic

If you are having connectivity related issues please share the following additional information

Describe your Cassandra cluster

please provide the following information

• output of nodetool status
• output of SELECT peer, rpc_address FROM system.peers
• rebuild your application with the gocql_debug tag and post the output