Error being displayed when config is passed in butane

config.yaml

@@ -0,0 +1,9 @@
+variant: fcos
+version: 1.5.0-experimental
+storage:
+  disks:
+    - device: /dev/sdb
+      wipe_table: false
+      partitions:
+        - label: foo
+          number: 0

config/fcos/v1_5_exp/translate.go

@@ -16,8 +16,8 @@ package v1_5_exp
 
 import (
 	"fmt"
-	"strings"
 	"log"
+	"strings"
 
 	baseutil "github.com/coreos/butane/base/util"
 	"github.com/coreos/butane/config/common"
@@ -73,7 +73,7 @@ func (c Config) ToIgn3_4Unvalidated(options common.TranslateOptions) (types.Conf
 		if !util.IsTrue(disk.WipeTable) {
 			for j, partition := range disk.Partitions {
 				// check for reserved partlabels
-				if partition.Label != nil  {
+				if partition.Label != nil {
 					if (*partition.Label == "BIOS-BOOT" && partition.Number != 1) || (*partition.Label == "PowerPC-PReP-boot" && partition.Number != 1) || (*partition.Label == "EFI-SYSTEM" && partition.Number != 2) || (*partition.Label == "boot" && partition.Number != 3) || (*partition.Label == "root" && partition.Number != 4) {
 						r.AddOnWarn(path.New("json", "storage", "disks", i, "partitions", j, "label"), common.ErrWrongPartitionNumber)
 					}
@@ -370,7 +370,6 @@ func isPartitionValid(disk types.Disk) error {
 		for _, partition := range disk.Partitions {
 			if partition.Number == 0 {
 				log.Fatal(common.ErrInvalidPartitionNumber)
-				return common.ErrInvalidPartitionNumber
 			}
 		}
 	}