Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Created attachment 17905 [details]
In my project I have a FSharp 4.0 Library. May main application is a C# project.
I referenced the F# project from my C# app.
When I run part of code from the F# Library I get a missing method exception.
The missing method is part of FSharp.Core 4.0. It seems that the App is using an older version FSharp.Core.
When looking at the build output, the FSharp.Core 4.0 is in the obj and bin folder.
This only happen at Debug. When using the release mode, it works.
This a severe regression with cycle 8. As this used to work in previous release.
Also we need cycle 8 for the fix with Samsung S6 and S7.
I have two developers who can’t work right now because of this.
I was able to reproduce this issue in Visual Studio (Sample works as expected in Xamarin Studio)
It appears to be an issue with the Shared Runtime not using F# 4.0. If I disable the "Use Shared Runtime" option in the TestAppF Project Properties then the app runs as expected with no MissingMethodException and the F# function returns the expected result.
Disable the "Use Shared Runtime" option.
Microsoft Visual Studio Enterprise 2015
Version 14.0.25431.01 Update 3
Microsoft .NET Framework
Installed Version: Enterprise
Architecture and Modeling Tools 00322-80000-00000-AA208
Microsoft Architecture and Modeling Tools
UML® and Unified Modeling Language™ are trademarks or registered trademarks of the Object Management Group, Inc. in the United States and other countries.
Microsoft Visual Studio Tools for Applications 2015 00322-80000-00000-AA208
Microsoft Visual Studio Tools for Applications 2015
Visual Basic 2015 00322-80000-00000-AA208
Microsoft Visual Basic 2015
Visual C# 2015 00322-80000-00000-AA208
Microsoft Visual C# 2015
Visual C++ 2015 00322-80000-00000-AA208
Microsoft Visual C++ 2015
Visual F# 2015 00322-80000-00000-AA208
Microsoft Visual F# 2015
Windows Phone SDK 8.0 - ENU 00322-80000-00000-AA208
Windows Phone SDK 8.0 - ENU
Application Insights Tools for Visual Studio Package 7.8.00927.1
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 2015.1 14.1.20907.0
ASP.NET and Web Tools 2015.1
ASP.NET Web Frameworks and Tools 2012.2 4.1.41102.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563
ASP.NET Web Frameworks and Tools 2013 5.2.40314.0
For additional information, visit http://www.asp.net/
Azure App Service Tools v2.9.5 14.0.20810.0
Azure App Service Tools v2.9.5
Azure Data Lake Node 1.0
This package contains the Data Lake integration nodes for Server Explorer.
Azure Data Lake Tools for Visual Studio 2.1.0000.0
Microsoft Azure Data Lake Tools for Visual Studio
Command Bus, Event Stream and Async Manager Merq
Provides ICommandBus, IEventStream and IAsyncManager MEF services for loosely coupled Visual Studio extension components communication and integration.
Common Azure Tools 1.8
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
A Visual Studio Extension that brings the GitHub Flow into Visual Studio.
Microsoft .NET Core Tools (Preview 2) 14.1.20907.0
Microsoft .NET Core Tools (Preview 2)
Microsoft Azure Hive Query Language Service 2.1.0000.0
Language service for Hive query
Microsoft Azure Mobile Services Tools 1.4
Microsoft Azure Mobile Services Tools
Microsoft Azure Tools 2.9
Microsoft Azure Tools for Microsoft Visual Studio 2015 - v2.9.40923.2
NuGet Package Manager 3.5.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
PreEmptive Analytics Visualizer 1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
SQL Server Analysis Services 13.0.1700.281
Microsoft SQL Server Analysis Services Designer
SQL Server Data Tools 14.0.60923.0
Microsoft SQL Server Data Tools
SQL Server Integration Services
Microsoft SQL Server Integration Services Designer
SQL Server Reporting Services 13.0.1700.281
Microsoft SQL Server Reporting Services Designers
Hosting json editor into a tool window
TypeScript tools for Visual Studio
Visual Studio Tools for Universal Windows Apps 14.0.25527.01
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.
Xamarin 184.108.40.2063 (3b7df6f)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 220.127.116.11 (96c7ba6)
Visual Studio extension to enable development for Xamarin.Android.
Xamarin.iOS 10.0.1.10 (ad1cd42)
Visual Studio extension to enable development for Xamarin.iOS.
Thinking maybe it was an issue of the Shared Runtime not being updated if it was on the device already without F# 4 support, I deleted the Shared Runtime from the testing device (VS Emulator) but the issue remained.
Shared runtime is probably using the bundled FSharp versionn (which is known to be old). But the app is using the Nuget version of FSharp.
This was fixed in xamarin-android/master/df41af04 by removing the FSharp.Core from the SharedRuntime.
Should be in the next major release.
In the meantime the workaround is to not use the SharedRuntime.
When will be the next major release ? I need this quickly.
I'm not sure when C9 will be shipping to stable. But it should be in Alpha in the next few weeks (along with all the "Alpha" caveats).
In the mean time the safest bet is to disable Shared Runtime in your project settings as Jon mentioned.
Disabling Shared runtime is ok for today, but every minute is money. And disabling shared runtime disable fast deployement.
So I don't want to have to use it every day.
I did not purchase a licence for a slow product. I need fast feedback cycle. Also i'm not using another channel than stable, as I don't want any more problem with xamarin.
Could you please provide a hotfix for cycle 8.