[INFO] updating cached repository tobyjsullivan/rust-game-loop
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tobyjsullivan/rust-game-loop
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tobyjsullivan/rust-game-loop" "work/ex/beta-1.38-1/sources/1.37.0/gh/tobyjsullivan/rust-game-loop"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tobyjsullivan/rust-game-loop'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tobyjsullivan/rust-game-loop" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tobyjsullivan/rust-game-loop"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tobyjsullivan/rust-game-loop'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7cb7bfe6f404795db58a89d3c6dcc0f925471584
[INFO] sha for GitHub repo tobyjsullivan/rust-game-loop: 7cb7bfe6f404795db58a89d3c6dcc0f925471584
[INFO] validating manifest of tobyjsullivan/rust-game-loop on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tobyjsullivan/rust-game-loop on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tobyjsullivan/rust-game-loop
[INFO] finished frobbing tobyjsullivan/rust-game-loop
[INFO] frobbed toml for tobyjsullivan/rust-game-loop written to work/ex/beta-1.38-1/sources/1.37.0/gh/tobyjsullivan/rust-game-loop/Cargo.toml
[INFO] started frobbing tobyjsullivan/rust-game-loop
[INFO] finished frobbing tobyjsullivan/rust-game-loop
[INFO] frobbed toml for tobyjsullivan/rust-game-loop written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tobyjsullivan/rust-game-loop/Cargo.toml
[INFO] crate tobyjsullivan/rust-game-loop already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tobyjsullivan/rust-game-loop against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tobyjsullivan/rust-game-loop:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5fc1072ed0ed121ce226fab23533b52ef4970a22bd189050016d14cdf6cb2b60
[INFO] running `"docker" "start" "-a" "5fc1072ed0ed121ce226fab23533b52ef4970a22bd189050016d14cdf6cb2b60"`
[INFO] [stderr]    Compiling rand_core v0.1.0-pre.0
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stderr]    Compiling rand v0.5.0-pre.0
[INFO] [stderr]    Compiling im v10.0.0
[INFO] [stderr]    Compiling game-loop v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_extras)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/system/controller.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `game-loop`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5fc1072ed0ed121ce226fab23533b52ef4970a22bd189050016d14cdf6cb2b60"`
[INFO] running `"docker" "rm" "-f" "5fc1072ed0ed121ce226fab23533b52ef4970a22bd189050016d14cdf6cb2b60"`
[INFO] [stdout] 5fc1072ed0ed121ce226fab23533b52ef4970a22bd189050016d14cdf6cb2b60