type 'Null' is not a subtype of type 'FutureOr<_HttpClientRequest>'

Flutter 开发 断点调试异常


[VERBOSE-2:ui_dart_state.cc(199)] Unhandled Exception: type 'Null' is not a subtype of type 'FutureOr<_HttpClientRequest>'
#0 _FutureListener.handleError (dart:async/future_impl.dart:169:20)
#1 Future._propagateToListeners.handleError (dart:async/future_impl.dart:719:47)
#2 Future._propagateToListeners (dart:async/future_impl.dart:740:24)
#3 Future._completeError (dart:async/future_impl.dart:550:5)
#4 Future._asyncCompleteError. (dart:async/future_impl.dart:606:7)
#5 _rootRun (dart:async/zone.dart:1354:13)
#6 _CustomZone.run (dart:async/zone.dart:1258:19)
#7 _CustomZone.runGuarded (dart:async/zone.dart:1162:7)
#8 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1202:23)
#9 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
#10 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
[VERBOSE-2:ui_dart_state.cc(199)] Unhandled Exception: type 'Null' is not a subtype of type 'FutureOr<_HttpClientRequest>'
#0 _FutureListener.handleError (dart:async/future_impl.dart:169:20)
#1 Future._propagateToListeners.handleError (dart:async/future_impl.dart:719:47)
#2 Future._propagateToListeners (dart:async/future_impl.dart:740:24)
#3 Future._completeError (dart:async/future_impl.dart:550:5)
#4 Future._asyncCompleteError. (dart:async/future_impl.dart:606:7)
#5 _rootRun (dart:async/zone.dart:1354:13)
#6 _CustomZone.run (dart:async/zone.dart:1258:19)
#7 _CustomZone.runGuarded (dart:async/zone.dart:1162:7)
#8 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1202:23)
#9 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
#10 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
[VERBOSE-2:ui_dart_state.cc(199)] Unhandled Exception: Null check operator used on a null value
#0 VMServiceWrapper.callExtensionService (package:dokit/kit/apm/vm/vm_service_wrapper.dart:50:29)
#1 upLoadUserInfo (package:dokit/dokit.dart:263:8)