RadioButtonGroup/RadioButton throw CGContextSetLineWidth error on iOS 18.0/18.1.

[cbuzzsaw]

Description

MACOS Sequoia (Version 15.0)
XCode : 16.0 (16A242d)
.NET MAUI 8.0 (.NET Maui workload listed versions:)
maui-ios Manifext Version: 8.0.82/8.0.100 Installation Source: SDK 8.0.400
maui-android Manifext Version: 8.0.82/8.0.100 Installation Source: SDK 8.0.400
maui Manifext Version: 8.0.82/8.0.100 Installation Source: SDK 8.0.400

(XAML code in page)

Compile and run on iOS (iPAD 10th Gen Emulator with iOS 18.0 and Physical iPAD with 18.0 and 18.1 throw errors) - you will notice errors in the Debug output log

When you navigate to the page with the above XAML snippet, iOS throws one error per each element you have in the group to the Debug.Output (ex.)
<timestamp/process omitted>... [Unknown process name] CGContextSetLineWidth: invalid line width: negative values are not allowed.
<timestamp/process omitted>... [Unknown process name] CGContextSetLineWidth: invalid line width: negative values are not allowed.

Steps to Reproduce

1. Create sample - .net maui project dotnet new maui -o mauisample
2. Add the snippet to the MainPage.xaml

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Link to public reproduction project repository

No response

Version with bug

8.0.82 SR8.2

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 18/ iOS 18.1 on iPAD and Emulator iPAD 10th Generation

Did you find any workaround?

No workaround found.

Relevant log output

<timestamp/process omitted>... [Unknown process name] CGContextSetLineWidth: invalid line width: negative values are not allowed.
<timestamp/process omitted>... [Unknown process name] CGContextSetLineWidth: invalid line width: negative values are not allowed.

[cbuzzsaw]

The repro instructions got stripped from the post... let me grab and add them, It is a simple Radio Button grouping. Plase the follwoing in the newly generated page from the dotnet new command, compile and run on iOS.

<HorizontalStackLayout RadioButtonGroup.GroupName="G1" RadioButtonGroup.SelectedValue="{Binding BIND1}">
	 <RadioButton x:Name="OptionA" Content="Yes" Value="Yes" />
	 <RadioButton x:Name="OptionB" Content="No" Value="No" />
	 <RadioButton x:Name="OptionC" Content="Partially" Value="Partially" />
</HorizontalStackLayout>

I believe it errors without the Binding information as well. Can't remember and not at my MAC dev machine currently.

[cbuzzsaw]

1. Create a new .net maui project with dotnet new maui -o mauiapp
2. Edit the MainPage.xaml code and add the following code before the last

<HorizontalStackLayout RadioButtonGroup.GroupName="G1" RadioButtonGroup.SelectedValue="{Binding BIND1}">
	 <RadioButton x:Name="OptionA" Content="Yes" Value="Yes" />
	 <RadioButton x:Name="OptionB" Content="No" Value="No" />
	 <RadioButton x:Name="OptionC" Content="Partially" Value="Partially" />
</HorizontalStackLayout>

4. restore the project with dotnet restore
5. build the project using dotnet build
6. run the project using dotnet run or use Visual Studio Code on MAC
7. Deploy the application to iOS and run
8. Change the radio button selection and watch the output log to see the errors.

This is the simplest repro using the standard starter project for .NET MAUI.