Cannot lift more than two signals at a time

[14427]

This code

let c1 = &time::every(1000);
let c2 = &time::every(1000);
let c3 = &time::every(1000);

c1.lift(|_| error!("A")); 
c2.lift(|_| error!("B"));
c3.lift(|_| error!("C"));

loop{} // Don't exit function

Prints B only once

[14427]

See issue rust-lang/rust#4718

[14427]

Workaround pushed, fixed for signal.rs, but still broken in rust