check err

Author: FGasper

internal/verifier/migration_verifier.go

@@ -1496,7 +1496,17 @@ func (verifier *Verifier) getNamespaces(ctx context.Context, fieldName string) (
 		return nil, err
 	}
 	for _, v := range ret {
-		namespaces = append(namespaces, v.(string))
+		vStr, isStr := v.(string)
+		if !isStr {
+			return nil, fmt.Errorf(
+				"expected %#q in %#q to be %T but was %T",
+				fieldName,
+				verifier.verificationTaskCollection().Name(),
+				vStr,
+				v,
+			)
+		}
+		namespaces = append(namespaces, vStr)
 	}
 	return namespaces, nil
 }