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Created attachment 9546 [details]
Debug log extracted from Visual Studio 2013
When calling PushAsync while a NavigationPage is popping, the application crashes, both on hardware device and emulator.
There is no way to detect navigation is happening.
Steps to reproduce:
- Open and run Xamarin Forms sample "WorkingWithNavigation" on Android (from https://github.com/xamarin/xamarin-forms-samples).
- Click "Next" on Page 1 to go to Page 2.
- Navigate back using the navigation bar or the hardware back button.
- Quickly press the "Next" button on Page 2 during the back navigation animation.
The application crashes with exception: System.ArgumentException: 'jobject' must not be IntPtr.Zero.
The application should not crash.
- The PushAsync waits for the Pop to complete.
- The PushAsync throws an exception we can catch.
- The XF team provides a way to detect that a NavigationPage is currently navigating. Right now I don't think we have any way to prevent this crash from happening.
- Visual Studio 2013
- Xamarin for VS 3.9.236
- Xamarin Forms 1.3.2-pre1 and 184.108.40.20696 (same behaviour on both versions)
- Samsung Galaxy S5 Active (A4.4.2) and Xamarin Android Player Nexus 4 (KitKat) (same behaviour on both devices)
The debug log is included as an attachment.
I have checked this issue and with the help of steps mentioned in bug description I am able to reproduce this issue.
Observations: When I tap the back button on the navigation bar and quickly press the Next button on same page during the back navigation animation. I observed that XS throw the following exception.
>01-29 17:00:14.945 I/MonoDroid(16249): System.ArgumentException: 'jobject' must not be IntPtr.Zero.
Application Output: https://gist.github.com/RamChBachkheti/6808fe2a640aef9d739f
Device logs: https://gist.github.com/RamChBachkheti/eba9f95e83d693d46f88
IDE logs: https://gist.github.com/RamChBachkheti/b901d4bded95ec7952b3
Please let me know if I can provide more info to this issue.
Microsoft Visual Studio Professional 2012
Version 11.0.61030.00 Update 4
Microsoft .NET Framework
Installed Version: Professional
LightSwitch for Visual Studio 2012 04938-004-0033001-02335
Microsoft LightSwitch for Visual Studio 2012
Office Developer Tools 04938-004-0033001-02335
Microsoft Office Developer Tools
Team Explorer for Visual Studio 2012 04938-004-0033001-02335
Microsoft Team Explorer for Visual Studio 2012
Visual Basic 2012 04938-004-0033001-02335
Microsoft Visual Basic 2012
Visual C# 2012 04938-004-0033001-02335
Microsoft Visual C# 2012
Visual C++ 2012 04938-004-0033001-02335
Microsoft Visual C++ 2012
Visual F# 2012 04938-004-0033001-02335
Microsoft Visual F# 2012
Visual Studio 2012 Code Analysis Spell Checker 04938-004-0033001-02335
Microsoft® Visual Studio® 2012 Code Analysis Spell Checker
Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.
The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
Visual Studio 2012 SharePoint Developer Tools 04938-004-0033001-02335
Microsoft Visual Studio 2012 SharePoint Developer Tools
ASP.NET and Web Tools 2012.3.41009
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Windows Azure Web Sites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Windows Azure
Microsoft Advertising SDK for Windows Phone
Microsoft Advertising SDK for Windows Phone
NuGet Package Manager 2.6.40627.9000
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
PreEmptive Analytics Visualizer 1.0
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
SQL Server Data Tools 11.1.20627.00
Microsoft SQL Server Data Tools
Workflow Manager Tools 1.0 1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.
Xamarin 220.127.116.11 (d6a2cae)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 18.104.22.168 (49a04b966feb40dfdba49d57ba16249b66d606a6)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 22.214.171.124 (eb24bdcf5cba2c12b673a07e0a8cce368b9563b3)
Visual Studio extension to enable development for Xamarin.iOS.
Xamarin.iOS Unified Migration 1.0
Automated migration for Xamarin iOS Classic projects to Unified
This should be fixed in 1.3.3-pre1
Re-open if its still happening for you
Thank you, Jason & the rest of the XF team. I can confirm this is fixed in 1.3.3-pre1!
Great job fixing this so quickly!
As per Comment 3 this issue has been fixed. Hence I am closing this issue.