[Bug] Linker error "Link Framework SDKs Only" when only using converters from CommunityToolkit

[JoacimWall]

Description

Hi not sure if this is the right place to share this information. We have started to migrate functions in our project to instead use the community Toolkit and we started with converters.

When we build with the setting "Link SDKs Only", the app stops working. Attach is an sample project where we recreated the error on the physics Iphone in debug mode. We also get the error when we build on the App Center in release mode for both Android and Ios.

linkerError.zip

In debug we get this error.
Position 6:6. Type xct:InvertedBoolConverter not found in xmlns http://xamarin.com/schemas/2020/toolkit

Steps to Reproduce

To Generate error

1. Download the sampel projekt and for IOS debug change to "Link SDKs only" for configuration:Debug Platform:Iphone
2. Remove the mtouch argument: --linkskip=Xamarin.CommunityToolkitDebug and you will get the error
3. Start Debug and you will get the error

Position 6:6. Type xct:InvertedBoolConverter not found in xmlns http://xamarin.com/schemas/2020/toolkit

If we add the mtouch argument:
--linkskip=Xamarin.CommunityToolkit
it's working.

I do not know much about linking and make code link safe or this is standard and the solution is that we need to add the
--linkskip=Xamarin.CommunityToolkit

Expected Behavior

Working no link error

Actual Behavior

Position 6:6. Type xct:InvertedBoolConverter not found in xmlns http://xamarin.com/schemas/2020/toolkit

Basic Information

• Version with issue:
• Last known good version:
• IDE:Visual Studio form Mac and AppCenter
• Platform Target Frameworks:
  • iOS: 14.3
  • Android: Android SDK 30
  • UWP:
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:

Workaround

Add --linkskip=Xamarin.CommunityToolkit

Reproduction imagery

Reproduction Link

[jfversluis]

@pictos thoughts?

[pictos]

@jfversluis looks like that's duplicated from #761 I'll give some love on this tomorrow

[pictos]

@JoacimWall I could not run your sample on my machine, I tried to create a repro and I coudn't reproduce the error. Can you send another repo, if you can generate one without any thirdparty software would be great!
@AlleSchonWeg can you provide a repo as well

App2.zip

[JoacimWall]

@JoacimWall I could not run your sample on my machine, I tried to create a repro and I coudn't reproduce the error. Can you send another repo, if you can generate one without any thirdparty software would be great!
@AlleSchonWeg can you provide a repo as well

App2.zip

Hi @pictos I have only used

 <PackageReference Include="Xamarin.Forms" Version="5.0.0.1905" />  
    <PackageReference Include="Xamarin.Essentials" Version="1.6.0" />
    <PackageReference Include="Xamarin.CommunityToolkit" Version="1.0.2" />

that should be ok. The only thing i have changed from the standard xamarin.froms template is that i change target version for Andriod to sdk 30.

regards Joacim

[pictos]

@JoacimWall thanks for your reply, I'll take a look during this week.

[pictos]

@JoacimWall can you try it again with the new XCT package? I tested here with the latest versions of XF and XCT I couldn't reproduce this behavior.

[FM1973]

Hello.
I got the same problem using the camera view.
In debug mode everything works fine. In release mode the app crashes.
Setting the linker option from "Link SDKs Only" to "none" solves the problem.

I´m using the latest versions of all Xamarin-Components.

[pictos]

@FM1973 could you use the same linker behavior for debug and share the exception and logs with us? Thanks

[FM1973]

Sure...
That´s the exception:

[mono] Unhandled Exception:
[mono] System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentException: EventToCommandBehavior: Couldn't resolve the event.
[mono] Parameter name: EventName
[mono] at Xamarin.Forms.Behavior.Xama03-22 01:29:02.559 E/mono ( 4958): at Xamarin.CommunityToolkit.Behaviors.EventToCommandBehavior.RegisterEvent () [0x00030] in <288835d5dc1b4bf68c236ae1ab65eb41>:0
[mono] at Xamarin.CommunityToolkit.Behaviors.EventToCommandBehavior.OnAttachedTo (Xamarin.Forms.VisualElement bindable) [0x00007] in <288835d5dc1b4bf68c236ae1ab65eb41>:0
[mono] at Xamarin.Forms.Behavior1[T].OnAttachedTo (Xamarin.Forms.BindableObject bindable) [0x00007] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\Behavior.cs:45 [mono] at CbScrumMobile.Views.ReceiptView..ctor () [0x00008] in D:\Kunden\CreativeBITS\CbScrum\CbScrumMobile\CbScrumMobile\CbScrrin.Forms.IAttachedObject.AttachTo (Xamarin.Forms.BindableObject bindable) [0x00027] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\Behavior.cs:22 [mono] at Xamarin.Forms.AttachedCollection1[T].InsertItem (System.Int32 index, T item) [0x0002b] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\AttachedCollection.cs:61
[mono] at System.Collections.ObjectModel.Collection1[T].Add (T item) [0x00020] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Collections/ObjectModel/Collection.cs:71 [mono] at CbScrumMobile.Views.ReceiptView.InitializeComponent () [0x00023] in D:\Kunden\CreativeBITS\CbScrum\CbScrumMobile\CbScrumMobile\CbScrumMobile\obj\Debug etstandard2.1\Views\ReceiptView.xaml.g.cs:26 [mono-rt] at Xamarin.Forms.Behavior.Xamarin.Forms.IAttachedObject.AttachTo (Xamarin.Forms.BindableObject bindable) [0x00027] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\Behavior.cumMobile\Views\ReceiptView.xaml.cs:18 [mono] at (wrapper managed-to-native) System.Reflection.RuntimeConstructorInfo.InternalInvoke(System.Reflection.RuntimeConstructorInfo,object,object[],System.Exception&) [mono] at System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:936 [mono] --- End of inner exception stack trace --- [mono] at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.82(intptr,intptr,intptr,intptr,intptr) [mono] at (wrapper native-to-managed) Android.Runtime.DynamicMethodNameCounter.82(intptr,intptr,intptr,intptr,intptr) [mono-rt] at (wrapper managed-to-native) System.Reflection.RuntimeConst03-22 01:29:02.560 E/mono-rt ( 4958): [ERROR] FATAL UNHANDLED EXCEPTION: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentException: EventToCommandBehavior: Couldn't resolve the event. [mono-rt] Parameter name: EventName [mono-rt] at Xamarin.CommunityToolkit.Behaviors.EventToCommandBehavior.RegisterEvent () [0x00030] in <288835d5dc1b4bf68c236ae1ab65eb41>:0 [mono-rt] at Xamarin.CommunityToolkit.Behaviors.EventToCommandBehavior.OnAttachedTo (Xamarin.Forms.VisualElement bindable) [0x00007] in <288835d5dc1b4bf68c236ae1ab65eb41>:0 [mono-rt] at Xamarin.Forms.Behavior1[T].OnAttachedTo (Xamarin.Forms.BindableObject bindable) [0x00007] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\Behavior.cs:45
[HostConnection] HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDs:22
[mono-rt] at Xamarin.Forms.AttachedCollection1[T].InsertItem (System.Int32 index, T item) [0x0002b] in D:\a\1\s\Xamarin.Forms.Core\Interactivity\AttachedCollection.cs:61 [mono-rt] at System.Collections.ObjectModel.Collection1[T].Add (T item) [0x00020] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Collections/ObjectModel/Collection.cs:71
[mono-rt] at CbScrumMobile.Views.ReceiptView.InitializeComponent () [0x00023] in D:\Kunden\CreativeBITS\CbScrum\CbScrumMobile\CbScrumMobile\CbScrumMobile\obj\Debug
etstandard2.1\Views\ReceiptView.xaml.g.cs:26
[mono-rt] at CbScrumMobile.Views.ReceiptView..ctor () [0x00008] in D:\Kunden\CreativeBITS\CbScrum\CbScrumMobile\CbScrumMobile\CbScrumMobile\Views\ReceiptView.xaml.cs:18
[mono-rt] at (wrapper managed-to-native) System.Reflection.RuntimeConstructorInfo.InternalInvoke(System.Reflection.RuntimeConstructorInfo,object,object[],System.Exception&)
[mono-rt] at System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:936
[mono-rt] --- End of inner exception stack trace ---
[mono-rt] at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.82(intptr,intptr,intptr,intptr,intptr)
[mono-rt] at (wrapper native-to-managed) Android.Runtime.DynamicMethodNameCounter.82(intptr,intptr,intptr,intptr,intptr)

[JoacimWall]

Hi have now tested this in version 1.1.0 and the bug is still there.

//Regards Joacim

[pictos]

@JoacimWall thanks for the report. We'll look this asap