[INFO] updating cached repository Skgland/BrainfuckRedoxScheme
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Skgland/BrainfuckRedoxScheme
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Skgland/BrainfuckRedoxScheme" "work/ex/beta-1.38-1/sources/1.37.0/gh/Skgland/BrainfuckRedoxScheme"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Skgland/BrainfuckRedoxScheme'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Skgland/BrainfuckRedoxScheme" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Skgland/BrainfuckRedoxScheme"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Skgland/BrainfuckRedoxScheme'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 771d19b37f77449e859df848a9e055e3ddf8bd39
[INFO] sha for GitHub repo Skgland/BrainfuckRedoxScheme: 771d19b37f77449e859df848a9e055e3ddf8bd39
[INFO] validating manifest of Skgland/BrainfuckRedoxScheme 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 Skgland/BrainfuckRedoxScheme 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 Skgland/BrainfuckRedoxScheme
[INFO] finished frobbing Skgland/BrainfuckRedoxScheme
[INFO] frobbed toml for Skgland/BrainfuckRedoxScheme written to work/ex/beta-1.38-1/sources/1.37.0/gh/Skgland/BrainfuckRedoxScheme/Cargo.toml
[INFO] started frobbing Skgland/BrainfuckRedoxScheme
[INFO] finished frobbing Skgland/BrainfuckRedoxScheme
[INFO] frobbed toml for Skgland/BrainfuckRedoxScheme written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Skgland/BrainfuckRedoxScheme/Cargo.toml
[INFO] crate Skgland/BrainfuckRedoxScheme 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 Skgland/BrainfuckRedoxScheme against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Skgland/BrainfuckRedoxScheme:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] dfb399a3b77e461f686df67e0bde93c9fc08696a0b71bef2473412b28e957372
[INFO] running `"docker" "start" "-a" "dfb399a3b77e461f686df67e0bde93c9fc08696a0b71bef2473412b28e957372"`
[INFO] [stderr]    Compiling redox_syscall v0.1.54
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.1.54/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(asm)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.1.54/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `redox_syscall`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dfb399a3b77e461f686df67e0bde93c9fc08696a0b71bef2473412b28e957372"`
[INFO] running `"docker" "rm" "-f" "dfb399a3b77e461f686df67e0bde93c9fc08696a0b71bef2473412b28e957372"`
[INFO] [stdout] dfb399a3b77e461f686df67e0bde93c9fc08696a0b71bef2473412b28e957372