[dart2wasm] Compiler crash when using ffi Structs as a paramter to @Native about sdk

[mkustermann]

We should have disallowed importing dart:ffi so one cannot run into this anymore, right?

As mentioned in may places, dart2wasm doesn't support dart:ffi at this moment. We do support a small subset of it, sufficient for skwasm.

The tracking bug for adding web support for dart:ffi is #46690 (structs-by-value is only one of the many dart:ffi things that haven't been implemented in dart2wasm)

If this isn't an immediate issue for skwasm (@eyebrowsoffire is it?) itself, then I suggest we close it in favor of #46690.

[dart-github-bot]

"The dart compile wasm command crashes when using an FFI struct as a parameter to a @Native function. This suggests an issue with how the Dart FFI types are being mapped to WebAssembly types during compilation."

labels: area-dart2wasm, type-bug

[mkustermann]

As we currently don't really support dart:ffis full feature set and do not allow 3rd parties to import it anymore, I consider this more a feature request for dart:ffi for the web (or the specific struct-by-value feature) instead of a report of a bug.

So will close this in favor of the more general support dart:ffi on the web. We have started discussions on this topic on the compiler teams and evaluate how we want to expose this in a way that makes sense for the product.

I hope that's ok.