Doesn't work with LTO enabled

[averyanalex]

WiFi connects (judging by the logs) regardless of LTO, but with lto = true in Cargo.toml it hangs somewhere after connection.

I use this code:

wifi_interface.connect().unwrap();

println!("Wait to get connected");
loop {
    let res = wifi_interface.is_connected();
    match res {
        Ok(connected) => {
            if connected {
                break;
            }
        }
        Err(err) => {
            println!("{:?}", err);
            loop {}
            // wifi_interface.connect().unwrap();
        }
    }
}

println!("Wait to get an ip address");
let network = Network::new(wifi_interface, current_millis);
loop {
    network.poll_dhcp().unwrap();

    network.work();

    if network.is_iface_up() {
        println!("got ip {:?}", network.get_ip_info());
        break;
    }
}

wifi_led.set_high().unwrap();

And with LTO led never turns on.

[bjoernQ]

On which target does this happen?

[averyanalex]

On which target does this happen?

esp32c3, riscv32imc-unknown-none-elf

[TheButlah]

Possibly related: #99

[MabezDev]

We're now recommending disabling LTO for now (#116), we've seen some strange issues on both Xtensa and RISCV of which the root cause seems to be LTO. Hopefully we'll be able to enable it again in the future :).