[INFO] updating cached repository ThatsGobbles/niente
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ThatsGobbles/niente
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ThatsGobbles/niente" "work/ex/beta-1.38-1/sources/1.37.0/gh/ThatsGobbles/niente"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ThatsGobbles/niente'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ThatsGobbles/niente" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ThatsGobbles/niente"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ThatsGobbles/niente'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97e5739e41e31d8b730dcab5da522ae5e6abee1a
[INFO] sha for GitHub repo ThatsGobbles/niente: 97e5739e41e31d8b730dcab5da522ae5e6abee1a
[INFO] validating manifest of ThatsGobbles/niente 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 ThatsGobbles/niente 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 ThatsGobbles/niente
[INFO] finished frobbing ThatsGobbles/niente
[INFO] frobbed toml for ThatsGobbles/niente written to work/ex/beta-1.38-1/sources/1.37.0/gh/ThatsGobbles/niente/Cargo.toml
[INFO] started frobbing ThatsGobbles/niente
[INFO] finished frobbing ThatsGobbles/niente
[INFO] frobbed toml for ThatsGobbles/niente written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ThatsGobbles/niente/Cargo.toml
[INFO] crate ThatsGobbles/niente 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 ThatsGobbles/niente 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-1/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/ThatsGobbles/niente:/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] 0286e94a9f9b36d3480b210a650dab2f76dbed5ddf026da9f715880a453558ff
[INFO] running `"docker" "start" "-a" "0286e94a9f9b36d3480b210a650dab2f76dbed5ddf026da9f715880a453558ff"`
[INFO] [stderr]    Compiling niente 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(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::constants::SILENCE_GATE`
[INFO] [stderr]  --> src/block.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::constants::SILENCE_GATE;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::constants::MAX_CHANNELS`
[INFO] [stderr]  --> src/util.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::constants::MAX_CHANNELS;
[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 `niente`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0286e94a9f9b36d3480b210a650dab2f76dbed5ddf026da9f715880a453558ff"`
[INFO] running `"docker" "rm" "-f" "0286e94a9f9b36d3480b210a650dab2f76dbed5ddf026da9f715880a453558ff"`
[INFO] [stdout] 0286e94a9f9b36d3480b210a650dab2f76dbed5ddf026da9f715880a453558ff