`Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt` occurs under certain conditions #815

mono0926 · 2021-10-13T07:18:06Z

Describe the bug

After 293cc06 was released, Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt occurs under certain conditions

To Reproduce

It reproduced on our internal project, and I haven't been able to create a simple reproducible sample code yet 🙏

I observed this:

ref.watch(fooProvider);
ref.watch(barProvider); // The error occurs under certain conditions.

ref.watch(fooProvider); is called
_dependents has this: https://github.com/rrousselGit/river_pod/blob/3a4637025ca9e7f30ee1c61fc9e7976e04415644/packages/riverpod/lib/src/framework/base_provider.dart#L935
element.getExposedValue() in watch called: https://github.com/rrousselGit/river_pod/blob/f410a75dc1ae8c665c9db9a4b2bdd63d4b49faa5/packages/riverpod/lib/src/framework/base_provider.dart#L940-L940
_dependents[i] has this and _didChangeDependency() called: https://github.com/rrousselGit/river_pod/blob/f410a75dc1ae8c665c9db9a4b2bdd63d4b49faa5/packages/riverpod/lib/src/framework/base_provider.dart#L795-L795
_debugDidChangeDependency was set to true
ref.watch(fooProvider); ended
ref.watch(barProvider); called
The assertion error occurs here because _debugDidChangeDependency was set to true: https://github.com/rrousselGit/river_pod/blob/f410a75dc1ae8c665c9db9a4b2bdd63d4b49faa5/packages/riverpod/lib/src/framework/base_provider.dart#L860-L860

Expected behavior

Works fine without any errors.

The text was updated successfully, but these errors were encountered:

rrousselGit · 2021-10-13T08:47:20Z

Hello!

Without a way to reproduce this, I have no means to K ow if that error is expected or not

mono0926 · 2021-10-13T09:23:31Z

I'm sorry, but I'd like to add a note when I can make a reproducible code 🙏

Arenukvern · 2021-10-14T20:07:56Z

Faced the same issue. Last working version for me is 1.0.0-dev.7

rrousselGit · 2021-10-15T10:25:04Z

This error was added on purpose recently.

Please add a way to reproduce the issue, otherwise chances are this is expected.

rrousselGit · 2021-10-23T10:59:27Z

For information: This happens typically happens if you're using ref.something on a provider that was disposed.

It could be that you're using a FutureProvider like so:

final provider = FutureProvider((ref) {
  ref.watch(foo);
  await something();
  ref.watch(bar);
})

But during the await something, the provider was disposed (because foo changed), causing ref.watch(bar) to fail with this error

KoheiKanagu · 2021-10-26T10:58:06Z

I had the same problem.

I've implemented a minimum of reproducible code, can you check it please?
https://gist.github.com/KoheiKanagu/d763d9d11f9204b554c6245b4c7c51a2

hooks_riverpod: 1.0.0-dev.11

❯ flutter --version
Flutter 2.5.3 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 18116933e7 (11 days ago) • 2021-10-15 10:46:35 -0700
Engine • revision d3ea636dc5
Tools • Dart 2.14.4

ControlRoom-2021-10-26-19-45-53.mp4

rrousselGit · 2021-10-26T14:04:43Z

Thanks for the reproducible code

Interestingly:

it doesn't happen on master branch, only on the version 1.0.0-dev.11

for some reasons, changing the onPressed of your example to:

onPressed: () {
  ref.read(fooStateNotifierProvider.notifier).sayHello();
  ref.read(fooStateNotifierProvider); // <- added
},

fixes the issue

KoheiKanagu · 2021-10-28T05:32:10Z

Thanks for checking.
I was able to solve the problem in my project.

tomoyuki28jp · 2021-10-30T07:16:00Z

My app uses the latest version of riverpod on master branch, but it sometimes throws this error :(

rrousselGit · 2021-10-30T14:29:42Z

@tomoyuki28jp could you share a way to reproduce the problem in your case?

I don't have the issue on master.

ethras · 2021-11-02T21:26:35Z

Facing the same issue randomly on 1.0.0-dev.11. But seems to be fixed on master branch

edit: Just happened again on master branch :/ was working fine on dev 7. No await in the provider code

mono0926 · 2021-11-08T02:39:02Z

With #815 (comment) code and this, the error occurs on 1.0.0 stable release.

void main() {
  runApp(
    const ProviderScope(
      child: MaterialApp(
        home: FirstScreen(),
      ),
    ),
  );
}

Tap Push First button
Tap Push Second button
The error occurs
The navigation is done successfully

The error message is Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt, but the log isn't printed at Console 🤔

tbm98 · 2021-11-08T12:28:10Z

my issue #831 no longer exists. maybe your issue and mine are not the same

chunghha · 2021-11-21T21:53:30Z

I see same exception. For my use case, the exception happens only once while redirecting to a path with go_router while app alive. Here is to reproduce the exception below. chunghha/fl_pages@7c08ec5

I may be probably missing to check something so keep digging in but also I'd like to share for a help.

Performing hot restart...                                               
Restarted application in 571ms.
flutter: GoRouter: known full paths for routes:
flutter: GoRouter:   => /
flutter: GoRouter:   => /polygon
flutter: GoRouter:   => /login
flutter: GoRouter: setting initial location /
flutter: |.. _routeToPath: /
flutter: \.... _authStatus: AuthStatus.unauthenticated
flutter: GoRouter: redirecting to /login
flutter: |.. _routeToPath: /login
flutter: \.... _authStatus: AuthStatus.unauthenticated
flutter: |.. _routeToPath: /login
flutter: \.... _authStatus: AuthStatus.unauthenticated
flutter: token 0002BIhGyCWXtb0YpIeRvED8TZ6R
flutter: \^[[38;5;12m┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────<…>
flutter: \^[[38;5;12m│ #0   printAppVersion (package:fl_pages/util/app_version.dart:12:13)<…>
flutter: \^[[38;5;12m│ #1   <asynchronous suspension><…>
flutter: \^[[38;5;12m├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄<…>
flutter: \^[[38;5;12m│ 💡 App Version: 1.1.0+1.1.0<…>
flutter: \^[[38;5;12m└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────<…>
flutter: GoRouter: going to /
flutter: ══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞═════════════════════════════════════════════════════════
flutter: The following _Exception was thrown Exception during GoRouter navigation:
flutter: Exception: 'package:riverpod/src/framework/provider_base.dart': Failed assertion: line 645 pos 7:
flutter: '_debugDidChangeDependency == false': Cannot use ref functions after the dependency of a provider
flutter: changed but before the provider rebuilt
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #2      ProviderElementBase._assertNotOutdated (package:riverpod/src/framework/provider_base.dart:645:7)
flutter: #3      ProviderElementBase.watch (package:riverpod/src/framework/provider_base.dart:691:5)
flutter: #4      appRouter.<anonymous closure>.<anonymous closure> (package:fl_pages/app.router.dart:49:15)
flutter: #5      GoRouterDelegate._getLocRouteMatchesWithRedirects (package:go_router/src/go_router_delegate.dart:323:22)
flutter: #6      GoRouterDelegate._go (package:go_router/src/go_router_delegate.dart:249:21)
flutter: #7      GoRouterDelegate.go (package:go_router/src/go_router_delegate.dart:149:5)
flutter: #8      GoRouter.go (package:go_router/src/go_router.dart:78:22)
flutter: #9      GoRouterHelper.go (package:go_router/go_router.dart:32:25)
flutter: #10     goToPage (package:fl_pages/app.router.dart:87:11)
flutter: #11     LoginButton.build.<anonymous closure> (package:fl_pages/widgets/login_button.widget.dart:39:11)
flutter: <asynchronous suspension>
flutter: (elided 2 frames from class _AssertionError)
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════
flutter: GoRouter: known full paths for routes:
flutter: GoRouter:   => /
flutter: GoRouter:   => /polygon
flutter: GoRouter:   => /login
flutter: GoRouter: setting initial location /
flutter: |.. _routeToPath: /
flutter: \.... _authStatus: AuthStatus.authenticated
flutter: GoRouter: refreshing /
flutter: |.. _routeToPath: /
flutter: \.... _authStatus: AuthStatus.authenticated
flutter: |.. _index onTap: 1
flutter: GoRouter: going to /polygon
flutter: |.. _routeToPath: /polygon
flutter: \.... _authStatus: AuthStatus.authenticated
flutter: |.. _index onTap: 0
flutter: GoRouter: going to /
flutter: |.. _routeToPath: /
flutter: \.... _authStatus: AuthStatus.authenticated
Application finished.

chunghha · 2021-11-21T22:56:35Z

I have my fix

rrousselGit · 2022-01-22T23:47:29Z

For reference, this should be fixed in the 2.0.0 dev release.

pcelis19 · 2022-01-24T21:49:58Z

For reference, this should be fixed in the 2.0.0 dev release.

Do you know where I can find the notes for 2.0.0-dev.0 because I am still getting the same issue:

'package:riverpod/src/framework/provider_base.dart': 
Failed assertion: line 657 pos 7: '_debugDidChangeDependency == false': 
Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt

rrousselGit · 2022-01-29T12:24:42Z

@pcelis19 Please provide a way to reproduce your issue. As mentioned before it could very well be that it's your code the problem

Scheideba · 2022-02-01T08:12:18Z

For reference, this should be fixed in the 2.0.0 dev release.

This worked for me thank you

sumanchapai · 2022-08-28T20:00:16Z

For me, I noticed that i was using watch where I should have used read.

    ref
        .read(todayRoutineStatusProvider.state)
        .update((_) => TodayRoutineStatus.loading);

Was to be used instead of

    ref
        .watch(todayRoutineStatusProvider.state)
        .update((_) => TodayRoutineStatus.loading);

Yogesh-Dubey-Ayesavi · 2024-02-26T06:40:35Z

For information: This happens typically happens if you're using ref.something on a provider that was disposed.

It could be that you're using a FutureProvider like so:
final provider = FutureProvider((ref) {
  ref.watch(foo);
  await something();
  ref.watch(bar);
})
But during the await something, the provider was disposed (because foo changed), causing ref.watch(bar) to fail with this error

What should i do in this case?

mono0926 added bug Something isn't working needs triage labels Oct 13, 2021

rrousselGit added question Further information is requested and removed needs triage labels Oct 13, 2021

mono0926 mentioned this issue Oct 19, 2021

'_debugDidChangeDependency == false': Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt #831

Closed

rrousselGit removed the question Further information is requested label Oct 26, 2021

rrousselGit closed this as completed Jan 22, 2022

timcreatedit mentioned this issue Nov 17, 2022

Assert throws: '_builtFuture == null': Bad state #1920

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Berkant35 mentioned this issue Aug 6, 2023

Connection problem Samsung S20 FE PhilipsHue/flutter_reactive_ble#779

Open

snapsl mentioned this issue Feb 20, 2024

Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt, when chaining providers #3354

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`Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt` occurs under certain conditions #815

`Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt` occurs under certain conditions #815

mono0926 commented Oct 13, 2021 •

edited

rrousselGit commented Oct 13, 2021

mono0926 commented Oct 13, 2021

Arenukvern commented Oct 14, 2021

rrousselGit commented Oct 15, 2021

rrousselGit commented Oct 23, 2021

KoheiKanagu commented Oct 26, 2021

rrousselGit commented Oct 26, 2021

KoheiKanagu commented Oct 28, 2021

tomoyuki28jp commented Oct 30, 2021

rrousselGit commented Oct 30, 2021

ethras commented Nov 2, 2021 •

edited

mono0926 commented Nov 8, 2021

tbm98 commented Nov 8, 2021

chunghha commented Nov 21, 2021 •

edited

chunghha commented Nov 21, 2021

rrousselGit commented Jan 22, 2022

pcelis19 commented Jan 24, 2022

rrousselGit commented Jan 29, 2022

Scheideba commented Feb 1, 2022

sumanchapai commented Aug 28, 2022

Yogesh-Dubey-Ayesavi commented Feb 26, 2024

Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt occurs under certain conditions #815

Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt occurs under certain conditions #815

Comments

mono0926 commented Oct 13, 2021 • edited

rrousselGit commented Oct 13, 2021

mono0926 commented Oct 13, 2021

Arenukvern commented Oct 14, 2021

rrousselGit commented Oct 15, 2021

rrousselGit commented Oct 23, 2021

KoheiKanagu commented Oct 26, 2021

rrousselGit commented Oct 26, 2021

KoheiKanagu commented Oct 28, 2021

tomoyuki28jp commented Oct 30, 2021

rrousselGit commented Oct 30, 2021

ethras commented Nov 2, 2021 • edited

mono0926 commented Nov 8, 2021

tbm98 commented Nov 8, 2021

chunghha commented Nov 21, 2021 • edited

chunghha commented Nov 21, 2021

rrousselGit commented Jan 22, 2022

pcelis19 commented Jan 24, 2022

rrousselGit commented Jan 29, 2022

Scheideba commented Feb 1, 2022

sumanchapai commented Aug 28, 2022

Yogesh-Dubey-Ayesavi commented Feb 26, 2024

`Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt` occurs under certain conditions #815

`Cannot use ref functions after the dependency of a provider changed but before the provider rebuilt` occurs under certain conditions #815

mono0926 commented Oct 13, 2021 •

edited

ethras commented Nov 2, 2021 •

edited

chunghha commented Nov 21, 2021 •

edited