Serving for the web produces error in the chrome devtools

[temeddix]

I'm using Flutter 3.10, Rust 1.69 on Windows.

I followed everything from the docs and flutter_rust_bridge_template and then used dart run flutter_rust_bridge:serve command, but the web target produces this error in the browser.

This is the chrome devtools log

main.dart.js:12984 Uncaught FfiException(EXECUTE_SYNC_ABORT, NoSuchMethodError: method not found: 'wire_prepare_channels$0' on null, TypeError: Cannot read properties of undefined (reading 'wire_prepare_channels$0')
    at Object.wire_prepare_channels$0$x (http://localhost:8080/main.dart.js:34786:42)
    at BridgeImpl_prepareChannels_closure.call$0 (http://localhost:8080/main.dart.js:108389:16)
    at BridgePlatform.executeSync$1$1 (http://localhost:8080/main.dart.js:107210:35)
    at BridgePlatform.executeSync$1 (http://localhost:8080/main.dart.js:107239:19)
    at BridgeImpl.prepareChannels$0 (http://localhost:8080/main.dart.js:108350:29)
    at http://localhost:8080/main.dart.js:33459:42
    at _wrapJsFunctionForAsync_closure.$protected (http://localhost:8080/main.dart.js:11588:15)
    at _wrapJsFunctionForAsync_closure.call$2 (http://localhost:8080/main.dart.js:58398:12)
    at Object._asyncStartSync (http://localhost:8080/main.dart.js:11552:20)
    at Object.organizeRustRelatedThings (http://localhost:8080/main.dart.js:33475:16))
    at Object.wrapException (http://localhost:8080/main.dart.js:8819:17)
    at BridgePlatform.executeSync$1$1 (http://localhost:8080/main.dart.js:107215:17)
    at BridgePlatform.executeSync$1 (http://localhost:8080/main.dart.js:107239:19)
    at BridgeImpl.prepareChannels$0 (http://localhost:8080/main.dart.js:108350:29)
    at http://localhost:8080/main.dart.js:33459:42
    at _wrapJsFunctionForAsync_closure.$protected (http://localhost:8080/main.dart.js:11588:15)
    at _wrapJsFunctionForAsync_closure.call$2 (http://localhost:8080/main.dart.js:58398:12)
    at Object._asyncStartSync (http://localhost:8080/main.dart.js:11552:20)
    at Object.organizeRustRelatedThings (http://localhost:8080/main.dart.js:33475:16)
    at http://localhost:8080/main.dart.js:33491:38

And this is my api.rs file

use flutter_rust_bridge::RustOpaque;
use flutter_rust_bridge::StreamSink;
use flutter_rust_bridge::SyncReturn;
use ref_thread_local::ref_thread_local;
use ref_thread_local::RefThreadLocal;
use std::cell::RefCell;
use std::collections::HashMap;
pub use std::sync::Mutex;
use tokio::sync::mpsc::channel;
use tokio::sync::mpsc::Receiver;
use tokio::sync::mpsc::Sender;
...
#[derive(Debug)]
pub struct EndpointsOnRustThread {
    pub user_action_receiver: Receiver<(String, String)>,
    pub viewmodel_update_sender: Sender<(String, Vec<u8>)>,
}
...
pub fn prepare_channels() -> SyncReturn<RustOpaque<Mutex<EndpointsOnRustThread>>> {
    // Thread 0 running Dart
    let (user_action_sender, user_action_receiver) = channel(1024);
    let refcell = USER_ACTION_SENDER.borrow();
    refcell.replace(Some(user_action_sender));
    let (viewmodel_update_sender, viewmodel_update_receiver) = channel(1024);
    let refcell = VIEWMODEL_UPDATE_RECEIVER.borrow();
    refcell.replace(Some(viewmodel_update_receiver));
    let endpoints_on_rust_thread = EndpointsOnRustThread {
        user_action_receiver,
        viewmodel_update_sender,
    };
    SyncReturn(RustOpaque::new(Mutex::new(endpoints_on_rust_thread)))
}
...

My code works very well when compiled to native platforms. It's only the web that produces this error. What am I missing here? I would be grateful to get any help :|

[fzyzcjy]

Hmm feel free to convert it to an issue since this looks like a bug!

Also cc @Desdaemon who made the great web part

[temeddix]

Okay :) It's now here: #1218