[INFO] cloning repository https://github.com/Kode-Cultur/rusty-gopher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kode-Cultur/rusty-gopher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKode-Cultur%2Frusty-gopher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKode-Cultur%2Frusty-gopher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2480e8ccf719ad56cd08b49ff7da40232b2a83f
[INFO] testing Kode-Cultur/rusty-gopher against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKode-Cultur%2Frusty-gopher" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kode-Cultur/rusty-gopher on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Kode-Cultur/rusty-gopher
[INFO] finished tweaking git repo https://github.com/Kode-Cultur/rusty-gopher
[INFO] tweaked toml for git repo https://github.com/Kode-Cultur/rusty-gopher written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Kode-Cultur/rusty-gopher already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded users v0.6.1
[INFO] [stderr]   Downloaded slog v2.2.3
[INFO] [stderr]   Downloaded slog-term v2.4.0
[INFO] [stderr]   Downloaded clippy v0.0.196
[INFO] [stderr]   Downloaded clippy_lints v0.0.196
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c6f900e0c462f3608c5294d73c369c6f3b96d8d87d3b7f0ceb7be265bc28a16
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3c6f900e0c462f3608c5294d73c369c6f3b96d8d87d3b7f0ceb7be265bc28a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c6f900e0c462f3608c5294d73c369c6f3b96d8d87d3b7f0ceb7be265bc28a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c6f900e0c462f3608c5294d73c369c6f3b96d8d87d3b7f0ceb7be265bc28a16", kill_on_drop: false }`
[INFO] [stdout] 3c6f900e0c462f3608c5294d73c369c6f3b96d8d87d3b7f0ceb7be265bc28a16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7782f97dc5a0d7d8117a51aa5fe487c62894b2ae4a4bf973c452709d5cb7f350
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7782f97dc5a0d7d8117a51aa5fe487c62894b2ae4a4bf973c452709d5cb7f350", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling slog v2.2.3
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling hostname v0.1.4
[INFO] [stderr]    Compiling users v0.6.1
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling syn v0.13.7
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.3
[INFO] [stderr]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling slog-term v2.4.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling tokio-fs v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.45
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling rusty-gopher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(termination_trait_lib)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(process_exitcode_placeholder)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(test)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty-gopher`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7782f97dc5a0d7d8117a51aa5fe487c62894b2ae4a4bf973c452709d5cb7f350", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7782f97dc5a0d7d8117a51aa5fe487c62894b2ae4a4bf973c452709d5cb7f350", kill_on_drop: false }`
[INFO] [stdout] 7782f97dc5a0d7d8117a51aa5fe487c62894b2ae4a4bf973c452709d5cb7f350