Error when no Android or iOS Folder provided

[melewetwo]

Unhandled exception:
NoSuchMethodError: The getter 'length' was called on null.
Receiver: null
Tried calling: length
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
#1      MyFileRepositry.myChangeIosAppName (package:flutter_create/src/file_repository_extension.dart:19:43)
<asynchronous suspension>
#2      FlutterCreate.changeAppName (package:flutter_create/src/flutter_create_base.dart:49:28)
<asynchronous suspension>
#3      FlutterCreate.create (package:flutter_create/src/flutter_create_base.dart:24:11)
<asynchronous suspension>
#4      main (file:///Users/philipp/development/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_create-1.0.2/bin/flutter_create.dart:30:21)
#5      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32)
#6      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
pub finished with exit code 255

When there is no iOS or Android folder, the creation fails.
There should be a check, if the folders exist.
Imho it is not necessary to provide these folders, as

flutter create .

will create the folders for you.