[cloud_functions] [firebase_core] Cloudfunction call or FirebaseCall crash IOS app

[exilonX]

Describe the bug
The bug is related somehow to the connection with firebase (even though autentication works) so it has two types of crashes:

1. Cloud Function crashes and returns a weird String

2019-10-16 15:39:14.272711+0300 Runner[2049:1095548] flutter: d8xdzLNCIKQ:APA91bEzGq_1PllS2mZQaBuDE4uYxBlQnrLok8X_XkdFg4dwNt69d2FHgCHq_lQlOGr7DWEHUqKWlOkMUKU2lt8pyalAwIby9B_D_Loyls_YEt88jifezPBKmowfkif0u2KofBCUOeRb

instead of the actual result of the function -

Every time it crashes I saw this error that's not very revealing:

2019-10-16 15:39:13.697858+0300 Runner[2049:1095548] [VERBOSE-2:shell.cc(178)] Dart Error: Unhandled exception:
Invalid argument(s): Dart_InvokeClosure expects argument 'closure' to be of type Instance.
null

A couple of times I was able to get this timeout error:

Task <6729D3D9-F64C-4444-9A88-7BFBC851B318>.<1> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x280771020 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <6729D3D9-F64C-4444-9A88-7BFBC851B318>.<1>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <6729D3D9-F64C-4444-9A88-7BFBC851B318>.<1>"
), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://europe-west1-aliniapp.cloudfunctions.net/unreadMessages, NSErrorFailingURLKey=https://europe-west1-aliniapp.cloudfunctions.net/unreadMessages, _kCFStreamErrorDomainKey=4}

2. The other type of error occurs if I just do a .get for a document in firebase:

019-10-16 16:33:49.703409+0300 Runner[2103:1113206] [VERBOSE-2:shell.cc(178)] Dart Error: Unhandled exception:
Invalid argument(s): Dart_InvokeClosure expects argument 'closure' to be of type Instance.
null
2019-10-16 16:33:49.934156+0300 Runner[2103:1113202] 6.10.0 - [Firebase/Analytics][I-ACS025008] Cannot query for public user properties when Analytics is disabled
2019-10-16 16:33:49.955100+0300 Runner[2103:1113206] flutter: Firebase user here is
2019-10-16 16:33:49.956833+0300 Runner[2103:1113206] flutter: FirebaseUser({displayName: null, providerId: Firebase, uid: sJ2l2J2kCLduOZrpn4t0DZGNLZ32, phoneNumber: +40723065763, isEmailVerified: false, providerData: [{email: null, providerId: phone, photoUrl: null, displayName: null, uid: null, phoneNumber: +40723065763}], email: null, photoUrl: null, lastSignInTimestamp: 1570795116933, isAnonymous: false, creationTimestamp: 1570703113662})
2019-10-16 16:33:49.965574+0300 Runner[2103:1113206] [VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: type 'String' is not a subtype of type 'Map<dynamic, dynamic>'
#0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:316:13)
<asynchronous suspension>
#1      MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:344:48)
<asynchronous suspension>
#2      DocumentReference.get (package:cloud_firestore/src/document_reference.dart:84:33)
<asynchronous suspension>
#3      _fetchLanguageAction (package:alini_patient/config/config_middleware.dart:61:102)
<asynchronous suspension>
#4      TypedMiddleware.call (package:redux/src/utils.dart:218:7)
#5      Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#6      TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#7      Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#8      TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#9      Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#10     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#11     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#12     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#13     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#14     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#15     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#16     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#17     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#18     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#19     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#20     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#21     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#22     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#23     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#24     TypedMiddleware.call (package:redux/src/utils.dart:220:11)
#25     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#26     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#27     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#28     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#29     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#30     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#31     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#32     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#33     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#34     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#35     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#36     EpicMiddleware.call (package:redux_epics/src/epic_middleware.dart:47:9)
#37     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#38     NavigationMiddleware.call (package:alini_patient/redux/middleware.dart:333:9)
<asynchronous suspension>
#39     Store._createDispatchers.<anonymous closure> (package:redux/src/store.dart:238:43)
#40     Store.dispatch (package:redux/src/store.dart:250:20)
#41     new InitViewModel.fromStore.<anonymous closure> (package:alini_patient/init/init_view_model.dart:38:15)
#42     _InitScreenState._onWillChange (package:alini_patient/init/init_screen.dart:73:21)
#43     _StoreStreamListenerState._init.<anonymous closure> (package:flutter_redux/flutter_redux.dart)
#44     _HandlerEventSink.add (dart:async/stream_transformers.dart:228:7)
#45     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:120:24)
#46     _rootRunUnary (dart:async/zone.dart:1132:38)
#47     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#48     _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#49     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#50     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#51     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#52     _MapStream._handleData (dart:async/stream_pipe.dart:232:10)
#53     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#54     _rootRunUnary (dart:async/zone.dart:1132:38)
#55     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#56     _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#57     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#58     _DelayedData.perform (dart:async/stream_impl.dart:591:14)
#59     _StreamImplEvents.handleNext (dart:async/stream_impl.dart:707:11)
#60     _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:667:7)
#61     _rootRun (dart:async/zone.dart:1120:38)
#62     _CustomZone.run (dart:async/zone.dart:1021:19)
#63     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#64     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#65     _rootRun (dart:async/zone.dart:1124:13)
#66     _CustomZone.run (dart:async/zone.dart:1021:19)
#67     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#68     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#69     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#70     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
2019-10-16 16:33:50.250149+0300 Runner[2103:1113206] [VERBOSE-2:shell.cc(178)] Dart Error: Unhandled exception:
Invalid argument(s): Dart_InvokeClosure expects argument 'closure' to be of type Instance.
null
2019-10-16 16:33:50.280044+0300 Runner[2103:1113206] [VERBOSE-2:shell.cc(178)] Dart Error: Unhandled exception:
NoSuchMethodError: Closure call with mismatched arguments: function 'call'
Receiver: Closure: () => void from Function '_startMicrotaskLoop@8048458': static.
Tried calling: call(TypedDataView(cid: 139))
Found: call() => void
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)

To Reproduce
Steps to reproduce the behavior:
I just restart the app multiple times and one out of three times it crashes!

Expected behavior
I expect cloud functions to be called correctly
Additional context
It happens only on IOS
I used to have cloud function on europe-west-1 and thought it was a region issue but I also moved them to us-central and I still get the error...
Now I have them on both regions!

[iapicca]

Hi @exilonX
can you please provide your updated flutter doctor -v ?
Also, to better address the issue, would be helpful
if you could post a self contained app on github
or the steps to reproduce it.
Thank you

[iapicca]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now. Please don't hesitate to comment on the bug if you have any more information for us; we will reopen it right away!
Thanks for your contribution.

Could everyone who still has this problem please file a new issue with the exact descriptions what happens, logs and the output of 'flutter doctor -v' please.
All system setups can be slightly different so its always better to open new issues and reference related issues.