[INFO] cloning repository https://github.com/Peruz/rust_read_csv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Peruz/rust_read_csv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4beac3234d00f162808444ec80b723baf0fab7a5
[INFO] checking Peruz/rust_read_csv against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Peruz/rust_read_csv on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Peruz/rust_read_csv
[INFO] finished tweaking git repo https://github.com/Peruz/rust_read_csv
[INFO] tweaked toml for git repo https://github.com/Peruz/rust_read_csv written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Peruz/rust_read_csv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d35083153c291c1e4b9c03117b3d6b1e6c91512b155f6769ed29b4d47cc0a6d
[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" "4d35083153c291c1e4b9c03117b3d6b1e6c91512b155f6769ed29b4d47cc0a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d35083153c291c1e4b9c03117b3d6b1e6c91512b155f6769ed29b4d47cc0a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d35083153c291c1e4b9c03117b3d6b1e6c91512b155f6769ed29b4d47cc0a6d", kill_on_drop: false }`
[INFO] [stdout] 4d35083153c291c1e4b9c03117b3d6b1e6c91512b155f6769ed29b4d47cc0a6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43f3bf1067003d6883c483ef7b72a84a4056fc8bb0214448a602a4719527f96b
[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" "43f3bf1067003d6883c483ef7b72a84a4056fc8bb0214448a602a4719527f96b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon-core v1.8.0 (https://github.com/rayon-rs/rayon.git#6ec07540)
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking os_str_bytes v2.3.1
[INFO] [stderr]    Compiling rayon v1.4.0 (https://github.com/rayon-rs/rayon.git#6ec07540)
[INFO] [stderr]     Checking csv-core v0.1.10 (https://github.com/BurntSushi/rust-csv.git#f0f53a49)
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1 (https://github.com/clap-rs/clap.git#ca27d50a)
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking clap v3.0.0-beta.1 (https://github.com/clap-rs/clap.git#ca27d50a)
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking csv v1.1.3 (https://github.com/BurntSushi/rust-csv.git#f0f53a49)
[INFO] [stderr]     Checking arrow v2.0.0-SNAPSHOT (https://github.com/apache/arrow.git#c6994f1e)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/arrow-3a9cfebb6b7b2bdc/c6994f1/rust/arrow/src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arrow`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "43f3bf1067003d6883c483ef7b72a84a4056fc8bb0214448a602a4719527f96b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43f3bf1067003d6883c483ef7b72a84a4056fc8bb0214448a602a4719527f96b", kill_on_drop: false }`
[INFO] [stdout] 43f3bf1067003d6883c483ef7b72a84a4056fc8bb0214448a602a4719527f96b