On iOS, .NET 9.0 Preview 3 corrupts SkiaSharp 3.0 Preview 2.1 memory after a while

[janne-hmp]

Description

When I upgrade my app to .NET 9.0 Preview 3 on iOS, memory of SkiaSharp 3.0 Preview 2.1 gets corrupted after a while. SkiaSharp stops working and just draws a black canvas in the end. This is the same as mono/SkiaSharp#2840 in SkiaSharp repository.

This may have something to do with dotnet/android#9153 and the possibly InvariantGlobalization workaround still corrupting the memory on iOS.

Reproduction Steps

1. Close GnollHack repository (https://github.com/hyvanmielenpelit/GnollHack)
2. Make sure you are using .NET 9.0 Preview 3
3. Build GnollHackX for iOS using the instructions in the wiki
4. Build then GnollHackM (Maui project) for iOS
5. Start the game. After playing the game for c. 1 minute (opening various different screens, inventory, menus etc.), the memory starts to get corrupted and most canvases are drawing only black or garbage.

Expected behavior

Game works as in .NET 9.0 Preview 2 without memory corruption.

Actual behavior

SkiaSharp's memory get corrupted and it stops working.

Regression?

Yes, this used to work in .NET 9.0 Preview 2.

Known Workarounds

None, have to use .NET 9.0 Preview 2.

Configuration

.NET MAUI 9.0.100-preview.3.24204.13
iOS 17.4.1, iPad 11,7
No idea if it is specific, most likely not.

Other information

No response

[janne-hmp]

I might add that the .NET MAUI iOS workload feed has been broken in .NET 9.0 Preview 3 and the relevant packages have been loaded by using the following NuGet configuration (in the case this is relevant):

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <clear />
    <!-- <add key="local" value="artifacts" /> -->
    <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" protocolVersion="3" />
    <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" protocolVersion="3" />
    <add key="benchmark-dotnet-prerelease" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/benchmark-dotnet-prerelease/nuget/v3/index.json" />
    <add key="dotnet8" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json" />
    <add key="dotnet8-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8-transport/nuget/v3/index.json" />
    <add key="dotnet9" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json" />
    <add key="dotnet9-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9-transport/nuget/v3/index.json" />
  </packageSources>
  <activePackageSource>
    <add key="All" value="(Aggregate source)" />
  </activePackageSource>
  <disabledPackageSources />
</configuration>

It seems to load some -p4 packages, so not sure if there's a further problem there.

[janne-hmp]

Need some further work here. This seems to be happening also with .NET 9.0 Preview 2 on iOS.