import 'dart:async'; import 'package:io/ansi.dart'; import 'all.dart' as hm; main() async { var zone = Zone.current.fork( specification: ZoneSpecification(print: (self, parent, zone, line) { if (line == 'null') { parent.print(zone, cyan.wrap(StackTrace.current.toString())); } }), ); return await zone.run(hm.main); }