[INFO] updating cached repository rust-gjk/rust-gjk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-gjk/rust-gjk
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-gjk/rust-gjk" "work/ex/beta-1.38-1/sources/1.37.0/gh/rust-gjk/rust-gjk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rust-gjk/rust-gjk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-gjk/rust-gjk" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rust-gjk/rust-gjk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rust-gjk/rust-gjk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a9cf143c2bc014599b6a1b8fa7a689867baed76e
[INFO] sha for GitHub repo rust-gjk/rust-gjk: a9cf143c2bc014599b6a1b8fa7a689867baed76e
[INFO] validating manifest of rust-gjk/rust-gjk 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 rust-gjk/rust-gjk 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 rust-gjk/rust-gjk
[INFO] finished frobbing rust-gjk/rust-gjk
[INFO] frobbed toml for rust-gjk/rust-gjk written to work/ex/beta-1.38-1/sources/1.37.0/gh/rust-gjk/rust-gjk/Cargo.toml
[INFO] started frobbing rust-gjk/rust-gjk
[INFO] finished frobbing rust-gjk/rust-gjk
[INFO] frobbed toml for rust-gjk/rust-gjk written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rust-gjk/rust-gjk/Cargo.toml
[INFO] crate rust-gjk/rust-gjk 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 rust-gjk/rust-gjk 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rust-gjk/rust-gjk:/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] 73dad30f5c1eada7541656c1c285d92fe5d78f753e8e7b273f46e4862de90557
[INFO] running `"docker" "start" "-a" "73dad30f5c1eada7541656c1c285d92fe5d78f753e8e7b273f46e4862de90557"`
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling encode_unicode v0.1.3
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling rustyline v1.0.0
[INFO] [stderr]    Compiling promptly v0.1.5
[INFO] [stderr]    Compiling rstd v0.3.0
[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/rstd-0.3.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(pattern)]
[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 `rstd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "73dad30f5c1eada7541656c1c285d92fe5d78f753e8e7b273f46e4862de90557"`
[INFO] running `"docker" "rm" "-f" "73dad30f5c1eada7541656c1c285d92fe5d78f753e8e7b273f46e4862de90557"`
[INFO] [stdout] 73dad30f5c1eada7541656c1c285d92fe5d78f753e8e7b273f46e4862de90557