ICE: drop_ty_immediate: non-box ty

[mstewartgallus]

The following code (as of commit 0012b50) gives an internal compiler error drop_ty_immediate: non-box ty.

use std::rt::rtio::RtioTimer;
use std::rt::io::Timer;

fn main() {
    let maybe_timer = Timer::new();
    maybe_timer.expect("Expected a timer").sleep(1);
}

[metajack]

I hit this this weekend on this exact case.

But i also hit it a few other times when I wasn't using Timer.

nominating production ready. this really sucks because the error is bad an you have no idea what you did wrong.

[chris-morgan]

I presume this is the same problem as #7672.

[flaper87]

I hit this bug as well when using Timer.

[flaper87]

Code bellow works. I wonder wether this worth's ICEing ?

After some more digging, .sleep expects a mutable self which may be the cause of this issue. Still, the error message doesn't say much (at least to me).

use std::rt::rtio::RtioTimer;
use std::rt::io::Timer;

fn main() {
    let maybe_timer = Timer::new();
    let mut t = maybe_timer.expect("Expected a timer");
    t.sleep(1000);
}

[catamorphism]

Accepted for production-ready

[thestinger]

Closing as duplicate of #7672. I can confirm that my fix for that bug fixes this.

[thestinger]

Also a duplicate of #9446. The fix in the queue is #9643.