All rust versions on playpen are at least one release behind.

[TimNN]

Playpen currently runs

Stable: rustc 1.8.0 (db2939409 2016-04-11)
Beta: rustc 1.9.0-beta.3 (e4e8b6668 2016-05-18)
Nightly: rustc 1.10.0-nightly (9c6904ca1 2016-05-18)

As of today (2016-06-20), the latest versions are:

Stable: rustc 1.9.0 (e4e8b6668 2016-05-18)
Beta: rustc 1.10.0-beta.2 (39f3c16cc 2016-05-26)
Nightly: rustc 1.11.0-nightly (bb4a79b08 2016-06-15)

---

Original post:

Try running (playpen):

#![feature(rustc_private)]
extern crate rustc_driver;

fn main() {
    println!("{:?}", rustc_driver::commit_date_str());
}

This prints: Some("2016-05-18")

[alexcrichton]

Logs indicate that we can't cargo install rustfmt:

May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal init.sh[17637]: Updating registry `https://github.com/rust-lang/crates.io-index`
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal init.sh[17637]: error: failed to fetch `https://github.com/rust-lang/crates.io-index`
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal init.sh[17637]: Caused by:
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal init.sh[17637]: [16/-17] The SSL certificate is invalid
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal systemd[1]: rust-playpen-update.service: main process exited, code=exited, status=101/n/a
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal systemd[1]: Failed to start Playpen sandbox root updater.
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal systemd[1]: Unit rust-playpen-update.service entered failed state.
May 31 16:56:50 ip-10-202-160-170.us-west-1.compute.internal systemd[1]: rust-playpen-update.service failed.

No idea why :(

[jonas-schievink]

It works on my local system, so the server might just be missing a little

roses are red
violets are blue
sudo pacman -Syu

[petrochenkov]

The nightly is one month old now.
Playpen must be hosted in some polar region.

[TimNN]

By the way, a better script to find the rust version used on playpen, which works on stable and beta as well, is:

use std::process::Command;
use std::str;

fn main() {
    println!("{}", str::from_utf8(&Command::new("rustc").arg("-v").arg("-V").output().unwrap().stdout).unwrap());
}

At this point it is probably important to note that not only is nightly outdated on playpen, but that stable and beta are also one version behind.

[alexcrichton]

Ok, as @eddyb pointed out I've disabled rustfmt to at least get these updated for now. Hopefully we can invest in a better solution soon.