Bug: async frb(init)

[mcmah309]

Describe the bug

Looking at the docs https://cjycode.com/flutter_rust_bridge/guides/how-to/init#use-frbinit , it is not clear when an init function will be called. I assume it is called by await RustLib.init(). Indeed this code does throw on the dart side with RustLib.init().

#[flutter_rust_bridge::frb(init)]
pub fn on_rust_lib_init() {
   panic!("panic at init");
}

But making the function async, does not result in a thrown exception on the dart side.

#[flutter_rust_bridge::frb(init)]
pub async fn on_rust_lib_init() {
   panic!("panic at init");
}

I would expect await RustLib.init() to throw here.

[mcmah309]

Indeed it looks like any code inside pub async fn on_rust_lib_init() is not called.

[fzyzcjy]

Indeed it looks like any code inside pub async fn on_rust_lib_init() is not called.

Hmm if so it is a bug... It should be called. I will check this soon.

At the same time, a workaround is make it non "init" and manually call it.

[fzyzcjy]

Btw, have you run codegen after changing code?

EDIT: Seems I cannot reproduce it. Details:

https://github.com/fzyzcjy/flutter_rust_bridge/blob/feat/12702/frb_example/dart_minimal/rust/src/api/minimal.rs

1. If do pub async fn init_app, see error logs like thread 'tokio-runtime-worker' panicked at src/api/minimal.rs:3:1:, showing it is executed, and it executed by tokio (async runtime)
2. If do pub fn init_app, see error logs like thread '<unnamed>' panicked at src/api/minimal.rs:3:1:, showing it is also executed