We have updated our project to .net 9 from .net 8 and are hitting a runtime error "WebAssembly.compileStreaming()".

[BradChase2011]

Has anyone encountered the error after upgrading to .net 9? At runtime we see this:

MONO_WASM: instantiate_wasm_module() failed CompileError: WebAssembly.compileStreaming(): Compiling function #27382:"CompressionNative_Crc32" failed: expected 1 elements on the stack for fallthru, found 4 @+7891257

I cant seem to find any info on it anywhere. Anyone know how to get around this or any info at all would really help. I used this link to get it moved over to .net 9: https://platform.uno/docs/articles/external/uno.wasm.bootstrap/doc/using-the-bootstrapper.html.

Thanks much!

[jeromelaban]

Thanks for the report, this looks like this .NET 9 RC2 issue dotnet/runtime#109289, likely caused by the fact that you're referencing SkiaSharp. There's a temporary workaround listed in the comments.

[jeromelaban]

Thanks for the updates. We do not have those information at this time, you'll find up-to-date details in the issue I mentioned as they get published.

[BradChase2011]

Understood. Ill keep track, thanks much!

[BradChase2011]

I have tried to create a sample uno wasm proj using the new "Sdk="Microsoft.NET.Sdk.WebAssembly"" but am unable to ever get the Main function called. This is just a simple project with no other libraries. Do you have a sample project that works for you? Or is the Main function not getting called part of the known bug? I do get all the setting's "Setting UNO_BOOTSTRAP_" output in the console but not any further.

So I wanted to clarify that the main not being called is the same between the one with skia and the sample without (and without the target).

EDIT: I know what is causing the main not to load and that's "true". If I set threading to false, then the main will load, true and it breaks.

[jeromelaban]

Threading is not working properly at this time, it's a work in progress on Microsoft's side.

[BradChase2011]

Ohh shoot ok, I thought through this incorrectly. I thought the threading was working like with the .net 8.0 side and Microsoft had moved their threading work to .net 10.0. We mainly need on emscripten 56+.