Ctrl-C Signal Detection in Rust (does not work!)

sigint.rs

use std::libc::c_int;

extern {
    fn signal(sig: c_int, handler: &fn(c_int));
}

#[fixed_stack_segment]
fn main() {
    unsafe { signal(2, handle); }
    loop {}
}

fn handle(param: c_int) {
    println("works!");
}

// error message is 
// `fatal runtime error: local malloc outside of task`