[MAUI][.NET9] Searching on the “Search all recipes page” will cause the app to crash.

[jaosnz-rep]

Description

Searching on the “Search all recipes page” will cause the app to crash.

Steps to Reproduce

1.Debug https://github.com/rachelkang/recipeSearch to Windows/Android/iOS/MacOS.
2. Enter some text on the search recipe and search to enter the ‘Search All Recipes’ page.
3. Searching for anything on the “Search all recipes page”.

Actual results:
The application will crash on the Android/iOS/Windows platform, but nothing happens after searching on the MacOS platform.

Windows:

Android:

iOS:

Expected results:
Can search successfully.

Link to public reproduction project repository

https://github.com/rachelkang/recipeSearch

Version with bug

9.0.100-preview.2.24129.7

Is this a regression from previous behavior?

Yes, this used to work in .NET 9 Preview1 MAUI

Last version that worked well

9.0.0-preview.1.9973

Affected platforms

iOS, Android, Windows, macOS

[rmarinho]

The workaround would be to add you csproj:

<MauiQueryPropertyAttributeSupport>true</MauiQueryPropertyAttributeSupport>

[jonathanpeppers]

MauiQueryPropertyAttributeSupport should have no effect when debugging:

maui/src/Controls/src/Build.Tasks/nuget/buildTransitive/netstandard2.0/Microsoft.Maui.Controls.targets

Lines 213 to 222 in 62790e2

	<Target Name="_MauiPrepareForILLink" BeforeTargets="PrepareForILLink;_GenerateRuntimeConfigurationFilesInputCache">
	<PropertyGroup>
	<MauiEnableIVisualAssemblyScanning Condition="'$(MauiEnableIVisualAssemblyScanning)' == ''">false</MauiEnableIVisualAssemblyScanning>
	</PropertyGroup>
	<PropertyGroup Condition="'$(PublishAot)' == 'true' or '$(TrimMode)' == 'full'">
	<MauiXamlRuntimeParsingSupport Condition="'$(MauiXamlRuntimeParsingSupport)' == '' ">false</MauiXamlRuntimeParsingSupport>
	<MauiShellSearchResultsRendererDisplayMemberNameSupported Condition="'$(MauiShellSearchResultsRendererDisplayMemberNameSupported)' == ''">false</MauiShellSearchResultsRendererDisplayMemberNameSupported>
	<MauiQueryPropertyAttributeSupport Condition="'$(MauiQueryPropertyAttributeSupport)' == ''">false</MauiQueryPropertyAttributeSupport>
	<MauiImplicitCastOperatorsUsageViaReflectionSupport Condition="'$(MauiImplicitCastOperatorsUsageViaReflectionSupport)' == ''">false</MauiImplicitCastOperatorsUsageViaReflectionSupport>
	</PropertyGroup>

maui/src/Core/src/RuntimeFeature.cs

Line 20 in 62790e2

private const bool IsQueryPropertyAttributeSupportedByDefault = true;

Was this being tested under NativeAOT or TrimMode=full?

[jonathanpeppers]

Ok, I believe this is fixed in .NET 9 Preview 4, which is coming out "soon".

[dotnet-policy-service]

Hi @jaosnz-rep. We have added the "s/try-latest-version" label to this issue, which indicates that we'd like you to try and reproduce this issue on the latest available public version. This can happen because we think that this issue was fixed in a version that has just been released, or the information provided by you indicates that you might be working with an older version.

You can install the latest version by installing the latest Visual Studio (Preview) with the .NET MAUI workload installed. If the issue still persists, please let us know with any additional details and ideally a reproduction project provided through a GitHub repository.

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.