[INFO] updating cached repository https://github.com/leo60228/chip8-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 63593ae56dfb617fa4e885e9b8cda7d7a21f8e49
[INFO] testing leo60228/chip8-rs against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleo60228%2Fchip8-rs" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leo60228/chip8-rs on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/leo60228/chip8-rs
[INFO] finished tweaking git repo https://github.com/leo60228/chip8-rs
[INFO] tweaked toml for git repo https://github.com/leo60228/chip8-rs written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/leo60228/chip8-rs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 8e9b1e4d0ca92472a6bf1b91f75b76506f1cd0e1a87f8ea24e9004ddcf1d3422
[INFO] running `"docker" "start" "-a" "8e9b1e4d0ca92472a6bf1b91f75b76506f1cd0e1a87f8ea24e9004ddcf1d3422"`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling array-macro v1.0.4
[INFO] [stderr]    Compiling bcd v0.1.0
[INFO] [stderr]    Compiling bitvec v0.14.0
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling minimp3-sys v0.3.1
[INFO] [stderr]    Compiling x11-dl v2.14.0
[INFO] [stderr]    Compiling minifb v0.11.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling getrandom v0.1.8
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling slice-deque v0.2.4
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling enum-map-derive v0.4.1
[INFO] [stderr]    Compiling lexical-core v0.4.3
[INFO] [stderr]    Compiling enum-map-internals v0.2.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bcd-0.1.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test, const_fn, const_let, try_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `bcd`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8e9b1e4d0ca92472a6bf1b91f75b76506f1cd0e1a87f8ea24e9004ddcf1d3422"`
[INFO] running `"docker" "rm" "-f" "8e9b1e4d0ca92472a6bf1b91f75b76506f1cd0e1a87f8ea24e9004ddcf1d3422"`
[INFO] [stdout] 8e9b1e4d0ca92472a6bf1b91f75b76506f1cd0e1a87f8ea24e9004ddcf1d3422