Timer periodic method can cause a weird failure

[mstewartgallus]

The following code sometimes causes a weird failure on exit. The error:

You've met with a terrible fate, haven't you?

fatal runtime error: type error: used SchedTask as GreenTask
aborted

The code:

use std::rt::io::timer::Timer;
use std::task;

pub fn main() {
    let mut timer = Timer::new().expect("Expected a timer");
    let timer_port = timer.periodic(1000);

    do {
        let mut task = task::task();
        task.name("Timer Port Listener");
        task
    }.spawn_with(timer_port) |timer_port| {
        loop {
            timer_port.try_recv();
        }
    }
}

[alexcrichton]

I've fixed this in my uv-rewrite branch. In my rewrite you also get a much clearer error (so we'll know exactly when this happens). This is actually a cause of a race condition as implemented today, but has a terrible error.