空安全异常 type 'Null' is not a subtype of type 'Object'

[zgfliusha]

type 'Null' is not a subtype of type 'Object'

When the exception was thrown, this was the stack:
#1 FlutterBoostAppState.onNativeResult (package:flutter_boost/src/flutter_boost_app.dart:529:28)
#2 BoostFlutterRouterApi.onNativeResult (package:flutter_boost/src/boost_flutter_router_api.dart:63:53)
#3 FlutterRouterApi.setup. (package:flutter_boost/src/messages.dart:148:15)
#4 FlutterRouterApi.setup. (package:flutter_boost/src/messages.dart:145:35)
#5 BasicMessageChannel.setMessageHandler. (package:flutter/src/services/platform_channel.dart:73:49)
#6 BasicMessageChannel.setMessageHandler. (package:flutter/src/services/platform_channel.dart:72:47)
#7 _DefaultBinaryMessenger.setMessageHandler. (package:flutter/src/services/binding.dart:395:35)
#8 _DefaultBinaryMessenger.setMessageHandler. (package:flutter/src/services/binding.dart:392:46)
#9 _invoke2. (dart:ui/hooks.dart:213:15)

复线路径：
flutterA页跳转nativeB页，返回flutterA页

url: 'https://github.com/alibaba/flutter_boost.git'
ref: 'v3.0-null-safety-preview.18'

建议修复： 添加默认值或判空

[sunsxuan]

我在官方null_safety分支下运行Android Demo， open flutter page -> open native page -> NativePageActivity 点返回的时候不携带参数，

void onNativeResult(CommonParams params) {
final initiatorPage = topContainer?.topPage.pageInfo.uniqueId;
final key = '$initiatorPage#${params.pageName}';
if (_pendingResult.containsKey(key)) {
_pendingResult[key]!.complete(params.arguments);
_pendingResult.remove(key);
}
Logger.log('onNativeResult, key:$key, result:${params.arguments}');
}

params 参数为：
pageName = "native"
uniqueId = null
arguments = null
opaque = null
key = null

没有出现异常，你可以贴上nativeB 返回的代码吗？

[zgfliusha]

arguments 为null
我理解是 _pendingResult[key]!.complete(null); 就会出问题，我本地加默认值{}就行了