Rust compiler errors hidden in flutter run

[AlienKevin]

Hi, I'm using flutter_rust_bridge V2 which uses cargokit under the hood. I noticed that when I have a compiler error in my Rust code, it's not showing up when executing flutter run. Instead, there's only a mysterious one-liner error message: Could not build the precompiled application for the device.

I had to do flutter run -v, browse through the massive trace, and finally find out that the rust library is messed up due to the overwrite. So currently as a workaround, I've been manually running cargo build to see if my Rust is free of any compiler errors, before executing flutter run.

I think it'd be nice to show the compiler errors at the default log level when executing flutter run, so that the user is aware of why the build failed.

[knopp]

This unfortunately seems more like a problem with flutter tool. In case of exception or build failure, anything with SEVERE level in cargokit gets logged to stderr. I can't really do anything about flutter tool not always logging this.

Hopefully this will change once cargokit can be migrated to native assets.