[INFO] updating cached repository Hikkygaya/rost_install
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Hikkygaya/rost_install
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Hikkygaya/rost_install" "work/ex/beta-1.38-1/sources/1.37.0/gh/Hikkygaya/rost_install"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Hikkygaya/rost_install'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Hikkygaya/rost_install" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hikkygaya/rost_install"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hikkygaya/rost_install'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9cf84bb9a5e68e9f1f3a3baebee66c3c08f5c1a3
[INFO] sha for GitHub repo Hikkygaya/rost_install: 9cf84bb9a5e68e9f1f3a3baebee66c3c08f5c1a3
[INFO] validating manifest of Hikkygaya/rost_install 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 Hikkygaya/rost_install 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 Hikkygaya/rost_install
[INFO] finished frobbing Hikkygaya/rost_install
[INFO] frobbed toml for Hikkygaya/rost_install written to work/ex/beta-1.38-1/sources/1.37.0/gh/Hikkygaya/rost_install/Cargo.toml
[INFO] started frobbing Hikkygaya/rost_install
[INFO] finished frobbing Hikkygaya/rost_install
[INFO] frobbed toml for Hikkygaya/rost_install written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hikkygaya/rost_install/Cargo.toml
[INFO] crate Hikkygaya/rost_install 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 Hikkygaya/rost_install 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/Hikkygaya/rost_install:/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] 0a8d65c1006d7aa7c37f1d71616dbb4fbbec7c60157d286a058ee4355b8ae42d
[INFO] running `"docker" "start" "-a" "0a8d65c1006d7aa7c37f1d71616dbb4fbbec7c60157d286a058ee4355b8ae42d"`
[INFO] [stderr]    Compiling want v0.0.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.2
[INFO] [stderr]    Compiling serde_json v1.0.22
[INFO] [stderr]    Compiling serde_urlencoded v0.5.2
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.6
[INFO] [stderr]    Compiling shell_helper v0.2.12
[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/shell_helper-0.2.12/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(range_contains)]
[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 `shell_helper`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0a8d65c1006d7aa7c37f1d71616dbb4fbbec7c60157d286a058ee4355b8ae42d"`
[INFO] running `"docker" "rm" "-f" "0a8d65c1006d7aa7c37f1d71616dbb4fbbec7c60157d286a058ee4355b8ae42d"`
[INFO] [stdout] 0a8d65c1006d7aa7c37f1d71616dbb4fbbec7c60157d286a058ee4355b8ae42d