[INFO] updating cached repository Kode-Cultur/rusty-gopher
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Kode-Cultur/rusty-gopher
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Kode-Cultur/rusty-gopher" "work/ex/beta-1.38-1/sources/1.37.0/gh/Kode-Cultur/rusty-gopher"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Kode-Cultur/rusty-gopher'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Kode-Cultur/rusty-gopher" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Kode-Cultur/rusty-gopher"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Kode-Cultur/rusty-gopher'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c2480e8ccf719ad56cd08b49ff7da40232b2a83f
[INFO] sha for GitHub repo Kode-Cultur/rusty-gopher: c2480e8ccf719ad56cd08b49ff7da40232b2a83f
[INFO] validating manifest of Kode-Cultur/rusty-gopher 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 Kode-Cultur/rusty-gopher 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 Kode-Cultur/rusty-gopher
[INFO] finished frobbing Kode-Cultur/rusty-gopher
[INFO] frobbed toml for Kode-Cultur/rusty-gopher written to work/ex/beta-1.38-1/sources/1.37.0/gh/Kode-Cultur/rusty-gopher/Cargo.toml
[INFO] started frobbing Kode-Cultur/rusty-gopher
[INFO] finished frobbing Kode-Cultur/rusty-gopher
[INFO] frobbed toml for Kode-Cultur/rusty-gopher written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Kode-Cultur/rusty-gopher/Cargo.toml
[INFO] crate Kode-Cultur/rusty-gopher 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 Kode-Cultur/rusty-gopher 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Kode-Cultur/rusty-gopher:/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] 312cdd16497de4db603b58106db133a2731fd03457d1768fff8efc4036c0e43b
[INFO] running `"docker" "start" "-a" "312cdd16497de4db603b58106db133a2731fd03457d1768fff8efc4036c0e43b"`
[INFO] [stderr]    Compiling slog v2.2.3
[INFO] [stderr]    Compiling serde v1.0.45
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling hostname v0.1.4
[INFO] [stderr]    Compiling users v0.6.1
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling slog-term v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.45
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling rusty-gopher v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/main.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | #![feature(termination_trait_lib)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/main.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | #![feature(process_exitcode_placeholder)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | #![feature(test)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rusty-gopher`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "312cdd16497de4db603b58106db133a2731fd03457d1768fff8efc4036c0e43b"`
[INFO] running `"docker" "rm" "-f" "312cdd16497de4db603b58106db133a2731fd03457d1768fff8efc4036c0e43b"`
[INFO] [stdout] 312cdd16497de4db603b58106db133a2731fd03457d1768fff8efc4036c0e43b