Please check if the engine has been initialized!

flutter boost:3.1.2
flutter :2.0.5
BoostNavigator.push 会报如下错误

2022-09-16 19:19:03.230 32453-32523/com.plateno.botaoota E/flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: 'package:flutter_boost/src/boost_navigator.dart': Failed assertion: line 73 pos 9: 'appState != null': Please check if the engine has been initialized!
#0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:46:39)
#1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
#2 BoostNavigator.push (package:flutter_boost/src/boost_navigator.dart:73:9)
#3 WHNavigator.open (package:wehotel_app/router/wh_navigator.dart:75:38)
#4 _HighLevelTabHomePageState.clickTab (package:wehotel_app/ui/tab_home/high_level_tab_home_page.dart:269:19)
#5 _HighLevelTabHomePageState.build.. (package:wehotel_app/ui/tab_home/high_level_tab_home_page.dart:197:19)
#6 _DemoFlowMenuStateClip._tap (package:wehotel_app/ui/tab_home/high_level_menu_bottom_clip.dart:176:19)
#7 _DemoFlowMenuStateClip.buildTab. (package:wehotel_app/ui/tab_home/high_level_menu_bottom_clip.dart:204:13)
#8 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
#9 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:607:11)
#10 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:296:5)
#11 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:230:7)
#12 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:475:9)
#13 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:93:12)
#14 PointerRouter._dispatchEventToRoutes. (package:flutter/src/gestures/pointer_router.dart:138:9)
#15 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:397:8)
#16 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:136:18)
#17 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:122:7)
#18 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:381:19)
#19 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:361:22)
#20 RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:278:11)
#21 GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:316:7)
#22 GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:280:5)
#23 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:238:7)
#24 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:221:7)
#25 _rootRunUnary (dart:async/zone.dart:1370:13)
#26 _CustomZone.runUnary (dart:async/zone.dart:1265:19)
#27 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)
#28 _invoke1 (dart:ui/hooks.dart:180:10)
#29 PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:276:7)
#30 _dispatchPointerDataPacket (dart:ui/hooks.dart:96:31)

Start at BoostNavigator.push in flutter_boost/src/boost_navigator.dart, especially the assertion at line 73, and compare it with the initialization path that precedes the call. Reproduce the failure using the reported Flutter Boost 3.1.2 and Flutter 2.0.5 versions, then establish the expected behavior when navigation occurs before initialization.

Written by the indexing model from the issue text.