[INFO] crate bastion 0.1.3 is already in cache
[INFO] extracting crate bastion 0.1.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/bastion/0.1.3
[INFO] extracting crate bastion 0.1.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bastion/0.1.3
[INFO] validating manifest of bastion-0.1.3 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 bastion-0.1.3 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 bastion-0.1.3
[INFO] finished frobbing bastion-0.1.3
[INFO] frobbed toml for bastion-0.1.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/bastion/0.1.3/Cargo.toml
[INFO] started frobbing bastion-0.1.3
[INFO] finished frobbing bastion-0.1.3
[INFO] frobbed toml for bastion-0.1.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bastion/0.1.3/Cargo.toml
[INFO] crate bastion-0.1.3 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 bastion-0.1.3 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-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bastion/0.1.3:/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] 894f1b6c6eae322675902ed7860f3708db8c7137aff1da237e1e643c5fa8f32f
[INFO] running `"docker" "start" "-a" "894f1b6c6eae322675902ed7860f3708db8c7137aff1da237e1e643c5fa8f32f"`
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling ratelimit v0.4.4
[INFO] [stderr]    Compiling objekt v0.1.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]    Compiling regex-syntax v0.6.7
[INFO] [stderr]    Compiling tokio-trace-core v0.2.0
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling signal-hook-registry v1.0.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling signal-hook v0.1.10
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.21
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling bastion v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(unboxed_closures)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(fn_traits)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(clamp)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(panic_info_message)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `bastion`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "894f1b6c6eae322675902ed7860f3708db8c7137aff1da237e1e643c5fa8f32f"`
[INFO] running `"docker" "rm" "-f" "894f1b6c6eae322675902ed7860f3708db8c7137aff1da237e1e643c5fa8f32f"`
[INFO] [stdout] 894f1b6c6eae322675902ed7860f3708db8c7137aff1da237e1e643c5fa8f32f