Xamarin.forms: [Bug] (NavigationRenderer) Pop Modal Object reference not set to an instance of an object

[moreirawebmaster]

Description

Steps to Reproduce

1. Push multiples MODAL
2. BACK(pop)
3. Exception after

Expected Behavior

pop modal corretly

Actual Behavior

exception

Basic Information

• Version with issue: 4.5
• Last known good version:
• IDE:
• Platform Target Frameworks:
  
  
  
  • iOS:
  
  
  • Android:
  
  
  • UWP:
  
  
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:

Screenshots

Reproduction Link

Workaround

{System.NullReferenceException: Object reference not set to an instance of an object at Xamarin.Forms.Platform.iOS.NavigationRenderer+ParentingViewController.Dispose (System.Boolean disposing) [0x00006] in d:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\NavigationRenderer.cs:1044 at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.10.0.17/src/Xamarin.iOS/Foundation/NSObject2.cs:147 at Xamarin.Forms.Platform.iOS.NavigationRenderer+<>c__DisplayClass68_0.<RemoveViewControllers>b__0 (System.Threading.Tasks.Task1[TResult] t) [0x00009] in d:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\NavigationRenderer.cs:608 at System.Threading.Tasks.ContinuationTaskFromResultTask1[TAntecedentResult].InnerInvoke () [0x00024] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:155 at System.Threading.Tasks.Task.Execute () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2319 }

[PureWeen]

Possibly fixed by this PR

https://github.com/xamarin/Xamarin.Forms/pull/9877

[jfversluis]

@moreirawebmaster would you by any chance be able to verify if it is indeed fixed by that PR? In that case we can close this one :)

[samhouts]

@moreirawebmaster Since we haven't heard from you in more than 30 days, we hope this issue is no longer affecting you. If it is, please reopen this issue and provide the requested information so that we can look into it further. Thank you!