diff --git a/metropolis/node/core/curator/state_node.go b/metropolis/node/core/curator/state_node.go
index d580e87..bd11f6a 100644
--- a/metropolis/node/core/curator/state_node.go
+++ b/metropolis/node/core/curator/state_node.go
@@ -446,7 +446,11 @@
 		return status.Errorf(codes.InvalidArgument, "invalid node id")
 	}
 	jkey, err := n.etcdJoinKeyPath()
-
+	if err != nil {
+		// This should never happen.
+		rpc.Trace(ctx).Printf("invalid join key representation: %v", err)
+		return status.Errorf(codes.InvalidArgument, "invalid join key representation")
+	}
 	// Delete both.
 	_, err = l.txnAsLeader(ctx,
 		clientv3.OpDelete(nkey),
diff --git a/metropolis/node/core/mgmt/svc_logs.go b/metropolis/node/core/mgmt/svc_logs.go
index b24e485..6566cee 100644
--- a/metropolis/node/core/mgmt/svc_logs.go
+++ b/metropolis/node/core/mgmt/svc_logs.go
@@ -169,7 +169,6 @@
 		if err != nil {
 			return err
 		}
-		chunk = make([]*cpb.LogEntry, 0, maxChunkSize)
 	}
 
 	// Start serving streaming data, if streaming has been requested.
diff --git a/metropolis/node/core/network/static.go b/metropolis/node/core/network/static.go
index a178e2c..6c72be5 100644
--- a/metropolis/node/core/network/static.go
+++ b/metropolis/node/core/network/static.go
@@ -168,6 +168,8 @@
 			for _, a := range i.Address {
 				ipNet, err := addressOrPrefix(a)
 				if err != nil {
+					l.Warningf("failed to parse %q as IPNet", a)
+					continue
 				}
 				if ipNet.IP.To4() != nil {
 					selectedAddr = ipNet.IP.To4()
diff --git a/metropolis/node/core/update/update.go b/metropolis/node/core/update/update.go
index ad4ad43..8490c78 100644
--- a/metropolis/node/core/update/update.go
+++ b/metropolis/node/core/update/update.go
@@ -275,6 +275,9 @@
 
 func (*Service) tryDownloadBundle(ctx context.Context, bundleURL string, bundleRaw *bytes.Buffer) error {
 	bundleReq, err := http.NewRequestWithContext(ctx, "GET", bundleURL, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
 	bundleRes, err := http.DefaultClient.Do(bundleReq)
 	if err != nil {
 		return fmt.Errorf("HTTP request failed: %w", err)