Segment throws an error when FailFastOnErrors is true.

[dhoehna]

Describe the bug

In Windbgx The stack has

• CommunityToolkit_WinUI_Controls_Segmented!CommunityToolkit.WinUI.Controls.SegmentedRns.CommunityToolkit_WinUI_Controls_Segmented_XamlTypeInfo.XamlTypeInfoProvider.set_9_FrameworkElementExtensions_AncestorType+0x5e
• CommunityToolkit_WinUI_Controls_Segmented!CommunityToolkit.WinUI.Controls.SegmentedRns.CommunityToolkit_WinUI_Controls_Segmented_XamlTypeInfo.XamlMember.SetValue+0x59

!Analyze gives

PROCESS_NAME: DevHome.dll

ERROR_CODE: (NTSTATUS) 0xc000027b - An application-internal exception has occurred.

SYMBOL_NAME: Microsoft_UI_Xaml!DirectUI::MetadataAPI::GetClassInfoFromOtherTypeBox+2b112e

MODULE_NAME: Microsoft_UI_Xaml

IMAGE_NAME: Microsoft.UI.Xaml.dll

FAILURE_BUCKET_ID: STOWED_EXCEPTION_80070057_Microsoft.UI.Xaml.dll!DirectUI::MetadataAPI::GetClassInfoFromOtherTypeBox

FAILURE_ID_HASH: {a398aebf-f73a-9df8-1025-000183a2eb14}

FAILURE_ID_REPORT_LINK: https://go.microsoft.com/fwlink/?LinkID=397724&FailureSearchText=a398aebf-f73a-9df8-1025-000183a2eb14

Looking into GetClassInfoFromOtherTypeBox. the runtime class name is null and causes a crash when trying to parse it

Steps to reproduce

Make a new Win UI 3 app.
Add a Segmented control to the app.
Inside App.Xaml.cs set `FailFastOnErrors` to true
Launch the app.

Expected behavior

The app launches.

Screenshots

No response

Code Platform

• UWP
• WinAppSDK / WinUI 3
• Web Assembly (WASM)
• Android
• iOS
• MacOS
• Linux / GTK

Windows Build Number

• Windows 10 1809 (Build 17763)
• Windows 10 1903 (Build 18362)
• Windows 10 1909 (Build 18363)
• Windows 10 2004 (Build 19041)
• Windows 10 20H2 (Build 19042)
• Windows 10 21H1 (Build 19043)
• Windows 10 21H2 (Build 19044)
• Windows 10 22H2 (Build 19045)
• Windows 11 21H2 (Build 22000)
• Other (specify)

Other Windows Build number

No response

App minimum and target SDK version

• Windows 10, version 1809 (Build 17763)
• Windows 10, version 1903 (Build 18362)
• Windows 10, version 1909 (Build 18363)
• Windows 10, version 2004 (Build 19041)
• Windows 10, version 2104 (Build 20348)
• Windows 11, version 22H2 (Build 22000)
• Other (specify)

Other SDK version

No response

Visual Studio Version

2022

Visual Studio Build Number

17.10.1

Device form factor

No response

Additional context

No response

Help us help you

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