[INFO] updating cached repository hinaria/arya
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hinaria/arya
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hinaria/arya" "work/ex/beta-1.38-1/sources/1.37.0/gh/hinaria/arya"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hinaria/arya'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hinaria/arya" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinaria/arya"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinaria/arya'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 40032cf3a67f31c5a53cc734d717d3ea277d53a0
[INFO] sha for GitHub repo hinaria/arya: 40032cf3a67f31c5a53cc734d717d3ea277d53a0
[INFO] validating manifest of hinaria/arya 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 hinaria/arya 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 hinaria/arya
[INFO] finished frobbing hinaria/arya
[INFO] frobbed toml for hinaria/arya written to work/ex/beta-1.38-1/sources/1.37.0/gh/hinaria/arya/Cargo.toml
[INFO] started frobbing hinaria/arya
[INFO] finished frobbing hinaria/arya
[INFO] frobbed toml for hinaria/arya written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinaria/arya/Cargo.toml
[INFO] crate hinaria/arya 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 hinaria/arya 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-2/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/hinaria/arya:/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] 047e1f5c782c18ad9d2e2fd80a9d8dda5c640d38da34e8b2625a66cde8e5e8ab
[INFO] running `"docker" "start" "-a" "047e1f5c782c18ad9d2e2fd80a9d8dda5c640d38da34e8b2625a66cde8e5e8ab"`
[INFO] [stderr]    Compiling arya v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | / #![feature(
[INFO] [stderr] 95 | |     crate_visibility_modifier,
[INFO] [stderr] 96 | |     extern_prelude,
[INFO] [stderr] 97 | |     in_band_lifetimes,
[INFO] [stderr] 98 | |     nll,
[INFO] [stderr] 99 | | )]
[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 `arya`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "047e1f5c782c18ad9d2e2fd80a9d8dda5c640d38da34e8b2625a66cde8e5e8ab"`
[INFO] running `"docker" "rm" "-f" "047e1f5c782c18ad9d2e2fd80a9d8dda5c640d38da34e8b2625a66cde8e5e8ab"`
[INFO] [stdout] 047e1f5c782c18ad9d2e2fd80a9d8dda5c640d38da34e8b2625a66cde8e5e8ab