'RenderBox was not laid out' was thrown

[satoyan]

Describe the bug
'RenderBox was not laid out' was thrown.

To Reproduce
Steps to reproduce the behavior:
The code I wrote was below
(just to show login form)

  import 'package:flutter/material.dart';                                                                                                                    
  import 'package:flutter_gen/gen_l10n/app_localizations.dart';                                                                                              
  import 'package:flutter_login/flutter_login.dart';                                                                                                         
                                                                                                                                                             
  class LoginScreen extends StatelessWidget {                                                                                                                
    @override                                                                                                                                                
    Widget build(BuildContext context) {                                                                                                                     
      return FlutterLogin(                                                                                                                                   
        onLogin: handleAuthUser,                                                                                                                             
        onRecoverPassword: handleRecoveryPassword,                                                                                                           
        onSignup: handleSignup,                                                                                                                              
      ); // FlutterLogin                                                                                                                                     
    }                                                                                                                                                        
                                                                                                                                                             
>>  Future<String> handleAuthUser(LoginData data) {}                                                                                                         
>>  Future<String> handleRecoveryPassword(String data) {}                                                                                                    
>>  Future<String> handleSignup(LoginData data) {}                                                                                                           
  }                                                                                                                                                          
~     

And when I start the app, an error was thrown

$ flutter run

Screenshots
I can see the error message below

An Observatory debugger and profiler on sdk gphone x86 arm is available at: http://127.0.0.1:42033/TOE7m9uJmNk=/
I/flutter (13350): ══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter (13350): The following assertion was thrown during a scheduler callback:
I/flutter (13350): RenderBox was not laid out: RenderRepaintBoundary#bb0f7 NEEDS-LAYOUT NEEDS-PAINT
I/flutter (13350): 'package:flutter/src/rendering/box.dart':
I/flutter (13350): Failed assertion: line 1785 pos 12: 'hasSize'
I/flutter (13350): 
I/flutter (13350): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (13350): more information in this error message to help you determine and fix the underlying cause.
I/flutter (13350): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (13350):   https://github.com/flutter/flutter/issues/new?template=BUG.md
I/flutter (13350): 
I/flutter (13350): When the exception was thrown, this was the stack:
I/flutter (13350): #2      RenderBox.size (package:flutter/src/rendering/box.dart:1785:12)
I/flutter (13350): #3      RenderBox.paintBounds (package:flutter/src/rendering/box.dart:2389:41)
I/flutter (13350): #4      _TransformerPageViewState._onGetSize (package:transformer_page_view/transformer_page_view.dart:461:34)
I/flutter (13350): #5      SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1117:15)
I/flutter (13350): #6      SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1063:9)
I/flutter (13350): #7      SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:864:7)
I/flutter (13350): (elided 13 frames from class _AssertionError, class _RawReceivePortImpl, class _Timer, dart:async, and dart:async-patch)
I/flutter (13350): ════════════════════════════════════════════════════════════════════════════════════════════════════

Information (please complete the following information):

• Device: Nexus9 (emulator)
• Platform android (API 30)
• Flutter version: 1.22.4
• Package version 1.0.14

[juliansteenbakker]

After some debugging i found out that this error is being thrown here:

flutter_login/lib/src/widgets/auth_card.dart

Line 280 in 2fe68e4

transformer: CustomPageTransformer(),

If we comment out this CustomPageTransformer() we don't get the error anymore. However, this PageTransformer controls the effect when navigation from login page to password reset page.

I have tried some things but i cant seem to find why this PageTransformer is causing issues. I think it has something to do with the parent width and height but i'm not sure.

[span]

I'm also seeing this for 1.1.0 in a fresh project where I simply add the example implementation. Is there a workaround that does not include hacking the library?

Attaching my sample project.
simplestats.zip

[juliansteenbakker]

At this moment there is no work around besides commenting out the CustomPageTransformer() in the library. Since commenting this out means removing the animation between the different login and signup cards I don't want to remove it. I'm still searching for a solution that doesn't involve removing the animation.

[span]

I see. I'll keep an eye open if I stumble into something. I reverted to 1.0.15 and it works great.

[SirNotReallySmokeAlot]

Hello all,
is there any new information on this already?

Or a workaround :)?

[VELCpro]

Hi all,
there are some news on the issue?

[alparslana]

Unfortunately, I have encountered even bigger problems with CustomPageTransformer call in my project. It is causing indeterminate memory errors, causing the whole application to crash.

RuntimeError: memory access out of bounds

It took me quite some time to discover the real cause, and I am still not sure under which conditions the problem surfaces but commenting that one line of code in auth_card.dart definitely solves the problem. The exception is triggered upon switching between login page and recover password page; sometimes during the 2nd switch, sometimes 20th. Interestingly, I didn't observe it with the example project, but in many other project formations I used, it shows up.

[shubh1204]

Hi,

is there any update on this issue?

[juliansteenbakker]

I have added the following parameter which can be used to disable the CustomPageTransformer: disableCustomPageTransformer: true