XamlC Compilation errors when upgrading to Microsoft.Maui.Controls 8.0.20

[konradzuse]

Description

Update the Nuget packages and compile the app, various compilation errors are reported for things like this...

<Style x:Key="Separator" TargetType="{x:Type BoxView}">
        <Setter Property="Color" Value="{StaticResource Gray-200}"/>
        <Setter Property="HeightRequest" Value="1"/>
        <Setter Property="Margin" Value="0,6"/>
        <Setter Property="HorizontalOptions" Value="FillAndExpand"/>
    </Style>

Error XFC0040 XamlC: Cannot convert value "Color" to "Microsoft.Maui.Controls.BindableProperty"

Other xaml files get comilation error..

Error XamlC: Input string was not in a correct format. Failure to parse near offset 69. Unexpected closing brace without a corresponding opening brace.

Despite them being perfectly valid Xaml and compiling correctly with 8.0.14

Steps to Reproduce

1. Update Nuget packages to 8.0.20
2. Compile app (Android/iOS)

Link to public reproduction project repository

No response

Version with bug

8.0.20 SR4

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

8.0.14 SR3.1

Affected platforms

iOS, Android

Affected platform versions

No response

Did you find any workaround?

No, removing the code presented as errors results in a new error reported in another file that was previously not reported.

Relevant log output

No response

[jonathanpeppers]

@konradzuse what is the code at offset 69? Is it complaining about TargetType="{x:Type BoxView}" or {StaticResource Gray-200}?

The diff has changes to {x:Type}, but not really any parsing logic I can tell:

• 8.0.14...8.0.20

[konradzuse]

@konradzuse what is the code at offset 69? Is it complaining about TargetType="{x:Type BoxView}" or {StaticResource Gray-200}?

There are 2 errors, one about my style binding to the BoxView Color property, and multiple others about closing braces at offset 69. Oddly every file it complains about is offset 69, and there's nothing to note at that offset.

[jonathanpeppers]

We think something went wrong here:

• 4306566

So, a workaround should be to use TargetType="BoxView" -- just removing the {x:Type} markup extension.

[ninachen03]

Verified this issue with Visual Studio 17.10.0 Preview 3(8.0.20). Can repro it but not repro in Maui control version:8.0.14