fix interface conversion panic when the list method failed

openstack/bms/v2/flavors/requests.go

@@ -67,6 +67,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Flavor, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return FlavorPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allFlavors, err := ExtractFlavors(pages)
 	if err != nil {

openstack/bms/v2/keypairs/requests.go

@@ -19,6 +19,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]KeyPair, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return KeyPairPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allkeypairs, err := ExtractKeyPairs(pages)
 	if err != nil {

openstack/bms/v2/nics/requests.go

@@ -24,6 +24,9 @@ func List(c *golangsdk.ServiceClient, serverId string, opts ListOpts) ([]Nic, er
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return NicPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allNICs, err := ExtractNics(pages)
 	if err != nil {

openstack/bms/v2/servers/requests.go

@@ -94,6 +94,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Server, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return ServerPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allservers, err := ExtractServers(pages)
 	if err != nil {

openstack/csbs/v1/backup/requests.go

@@ -41,6 +41,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Backup, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return BackupPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allBackups, err := ExtractBackups(pages)
 	if err != nil {

openstack/csbs/v1/policies/requests.go

@@ -31,6 +31,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]BackupPolicy, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return BackupPolicyPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allpolicy, err := ExtractBackupPolicies(pages)
 	if err != nil {

openstack/deh/v1/hosts/doc.go

@@ -30,6 +30,10 @@ Example to delete Hosts
 Example to List Hosts
 	listdeh := hosts.ListOpts{}
 	alldehs, err := hosts.List(client,listdeh).AllPages()
+	if err != nil {
+		panic(err)
+	}
+
 	list,err:=hosts.ExtractHosts(alldehs)
 	if err != nil {
 		panic(err)
@@ -45,10 +49,10 @@ Example to List Servers
 	listOpts := hosts.ListServerOpts{}
 	allServers, err := hosts.ListServer(client, "671611d2-b45c-4648-9e78-06eb24522291",listOpts)
 	if err != nil {
-	panic(err)
+		panic(err)
 	}
 
 	for _, server := range allServers {
-	fmt.Printf("%+v\n", server)
+		fmt.Printf("%+v\n", server)
 	}
 */

openstack/deh/v1/hosts/requests.go

@@ -171,6 +171,9 @@ func ListServer(c *golangsdk.ServiceClient, id string, opts ListServerOpts) ([]S
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return ServerPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allservers, err := ExtractServers(pages)
 	if err != nil {

openstack/dns/v2/recordsets/doc.go

@@ -15,7 +15,7 @@ Example to List RecordSets by Zone
 		panic(err)
 	}
 
-	allRRs, err := recordsets.ExtractRecordSets(allPages()
+	allRRs, err := recordsets.ExtractRecordSets(allPages)
 	if err != nil {
 		panic(err)
 	}

openstack/networking/v1/subnets/requests.go

@@ -55,6 +55,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Subnet, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return SubnetPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allSubnets, err := ExtractSubnets(pages)
 	if err != nil {

openstack/networking/v1/vpcs/requests.go

@@ -42,6 +42,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Vpc, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return VpcPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allVpcs, err := ExtractVpcs(pages)
 	if err != nil {

openstack/networking/v2/peerings/doc.go

@@ -2,31 +2,25 @@
 Package peerings enables management and retrieval of vpc peering connections
 
 Example to List a Vpc Peering Connections
-	   listOpts:=peerings.ListOpts{}
+		listOpts:=peerings.ListOpts{}
 
 		peering,err :=peerings.List(client,sub).AllPages()
+		if err != nil{
+			fmt.Println(err)
+		}
 
 		peerings,err:=peerings.ExtractPeerings(peering)
-
-
 		if err != nil{
 			fmt.Println(err)
 		}
 
 Example to Get a Vpc Peering Connection
-
-       	peeringID := "6bbacb0f-9f94-4fe8-a6b6-1818bdccb2a3"
-
-
+		peeringID := "6bbacb0f-9f94-4fe8-a6b6-1818bdccb2a3"
 		peering,err :=peerings.Get(client,peeringID).Extract()
-
-
 		if err != nil{
 			fmt.Println(err)
 		}
 
-
-
 Example to Accept a Vpc Peering Connection Request
  // Note:- The TenantId should be of accepter
 

openstack/networking/v2/peerings/requests.go

@@ -60,6 +60,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Peering, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return PeeringConnectionPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allPeeringConns, err := ExtractPeerings(pages)
 	if err != nil {

openstack/sfs/v2/shares/requests.go

@@ -83,6 +83,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Share, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return SharePage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allShares, err := ExtractShares(pages)
 	if err != nil {

openstack/vbs/v2/policies/requests.go

@@ -148,6 +148,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Policy, error) {
 	pages, err := pagination.NewPager(c, commonURL(c), func(r pagination.PageResult) pagination.Page {
 		return PolicyPage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allPolicies, err := ExtractPolicies(pages)
 	if err != nil {

openstack/vbs/v2/shares/requests.go

@@ -50,6 +50,9 @@ func List(c *golangsdk.ServiceClient, opts ListOpts) ([]Share, error) {
 	pages, err := pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
 		return SharePage{pagination.LinkedPageBase{PageResult: r}}
 	}).AllPages()
+	if err != nil {
+		return nil, err
+	}
 
 	allShares, err := ExtractShareList(pages)
 	if err != nil {