Don't take a reference a var in a loop

Fixes #2491

client/driver/env/env.go

@@ -203,12 +203,12 @@ func (t *TaskEnvironment) Build() *TaskEnvironment {
 				continue
 			}
 			for _, nw := range resources.Networks {
-				ports := make([]*structs.Port, 0, len(nw.ReservedPorts)+len(nw.DynamicPorts))
+				ports := make([]structs.Port, 0, len(nw.ReservedPorts)+len(nw.DynamicPorts))
 				for _, port := range nw.ReservedPorts {
-					ports = append(ports, &port)
+					ports = append(ports, port)
 				}
 				for _, port := range nw.DynamicPorts {
-					ports = append(ports, &port)
+					ports = append(ports, port)
 				}
 				for _, p := range ports {
 					key := fmt.Sprintf("%s%s_%s", AddrPrefix, taskName, p.Label)

client/driver/env/env_test.go

@@ -139,6 +139,16 @@ func TestEnvironment_AsList(t *testing.T) {
 	n := mock.Node()
 	a := mock.Alloc()
 	a.TaskResources["web"].Networks[0].DynamicPorts[0].Value = 2000
+	a.TaskResources["ssh"] = &structs.Resources{
+		Networks: []*structs.NetworkResource{
+			{
+				ReservedPorts: []structs.Port{
+					{Label: "ssh", Value: 22},
+					{Label: "other", Value: 1234},
+				},
+			},
+		},
+	}
 	env := NewTaskEnvironment(n).
 		SetNetworks(networks).
 		SetPortMap(portMap).
@@ -165,6 +175,12 @@ func TestEnvironment_AsList(t *testing.T) {
 		"NOMAD_IP_web_main=192.168.0.100",
 		"NOMAD_IP_web_http=192.168.0.100",
 		"NOMAD_TASK_NAME=taskA",
+		"NOMAD_ADDR_ssh_other=:1234",
+		"NOMAD_ADDR_ssh_ssh=:22",
+		"NOMAD_IP_ssh_other=",
+		"NOMAD_IP_ssh_ssh=",
+		"NOMAD_PORT_ssh_other=1234",
+		"NOMAD_PORT_ssh_ssh=22",
 	}
 	allocID := fmt.Sprintf("NOMAD_ALLOC_ID=%s", a.ID)
 	exp = append(exp, allocID)