#0      _File.open.<anonymous closure> (dart:io/file_impl.dart:364:9)
#1      _rootRunUnary (dart:async/zone.dart:1132:38)
#2      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#3      _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
#4      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
#5      Future._propagateToListeners (dart:async/future_impl.dart:668:32)
#6      Future._completeWithValue (dart:async/future_impl.dart:483:5)
#7      Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:513:7)
#8      _rootRun (dart:async/zone.dart:1124:13)
#9      _CustomZone.run (dart:async/zone.dart:1021:19)
#10     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#11     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#12     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#13     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:115:13)
#14     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:5)

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