Playground nightly toolchain times out trying to build anything.

[moxian]

When trying to run any code in playground with nightly toolchain (example), the compiler is (seemingly?) trying to compile all the crates, and times out doing so.

Sample stderr output:

   Compiling rand_os v0.1.2
   Compiling iovec v0.1.2
   Compiling net2 v0.2.33
   Compiling num_cpus v1.10.0
   Compiling memchr v2.2.0
   Compiling time v0.1.42
   Compiling xattr v0.2.2
   Compiling filetime v0.2.4
   Compiling atty v0.2.11
   Compiling rand v0.4.6
   Compiling thread-id v3.3.0
   Compiling MacTypes-sys v2.1.0
   Compiling termion v1.5.1
   Compiling memmap v0.7.0
   Compiling crossbeam-epoch v0.7.1
   Compiling crossbeam-epoch v0.3.1
   Compiling deflate v0.7.19
   Compiling base64 v0.10.1
/root/entrypoint.sh: line 8:     7 Killed                  timeout --signal=KILL ${timeout} "$@"

cc @shepmaster

[shepmaster]

Progress being tracked in rust-lang/rust-playground#469

[moxian]

Playground is working again now.
Thanks!