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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Variables never read or used, Failed to convert at JsValue wasm bindgen

I'm working on implementing a QUIC, and WebTransport client and server in the browser. I'm simultaneously trying to compile a Node.js Addon-based respository that depends on quiche written in C++ to WASM with WASI support, and a repository that uses quinn-wasm in Rust to WASM GitHub - guest271314/quinn-wasm at direct-sockets.

A fellow developer got the QUIC code started in Rust part. I modified the original code a few minutes ago, mainly to get the Isolated Web App code to compile and run correctly in the browser. I change some Rust code to set the port to 8081 instead of 0, which UDPSocket in the browser throws for; port can't be 0.

After compiling with rustup wasm-pack build --target web --out-dir pkg I got these warnings, the compilation completed anyway

warning: fields `readable` and `writable` are never read
  --> src/direct_sockets.rs:97:5
   |
96 | pub struct DirectSocketUdp {
   |            --------------- fields in this struct
97 |     readable: Mutex<Pin<Box<web_sys::ReadableStream>>>,
   |     ^^^^^^^^
98 |     writable: Mutex<Pin<Box<web_sys::WritableStream>>>,
   |     ^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: method `write_to_socket` is never used
   --> src/direct_sockets.rs:125:14
    |
115 | impl DirectSocketUdp {
    | -------------------- method in this implementation
...
125 |     async fn write_to_socket(&self, message: UdpMessage) -> Result<(), ...
    |              ^^^^^^^^^^^^^^^

warning: `quinn-wasm` (lib) generated 2 warnings
   Compiling quinn-wasm-direct-sockets v0.1.0 (/media/user/1/quinn-wasm/examples/direct-sockets-web)
    Finished `release` profile [optimized + debuginfo] target(s) in 2.50s

Installing the IWA and running the code I'm getting an error in JsValue (wasm bindgen) in the browser

Error: Failed to convert to UDPSocketStreams: JsValue(Object({"localAddress":"0.0.0.0","localPort":8081,"readable":{},"writable":{}}))

I'm trying to figure out if that's the readable and writable that are never used in the Rust code; if the WHATWG ReadableStream and WritableStream are not getting converted to corresponding Rust, and compiled WASM values - and how to fix that part?

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