[INFO] cloning repository https://github.com/flum1025/twistributer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flum1025/twistributer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d96f63663981d451ecbcb3190d9ea7fe4b513653
[INFO] checking flum1025/twistributer against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/flum1025/twistributer 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/flum1025/twistributer
[INFO] finished tweaking git repo https://github.com/flum1025/twistributer
[INFO] tweaked toml for git repo https://github.com/flum1025/twistributer written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/flum1025/twistributer 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] d27a915e6f082b7abff2001383698f0cbc5a4282b6271437ab2508fa1172c587
[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" "d27a915e6f082b7abff2001383698f0cbc5a4282b6271437ab2508fa1172c587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d27a915e6f082b7abff2001383698f0cbc5a4282b6271437ab2508fa1172c587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d27a915e6f082b7abff2001383698f0cbc5a4282b6271437ab2508fa1172c587", kill_on_drop: false }`
[INFO] [stdout] d27a915e6f082b7abff2001383698f0cbc5a4282b6271437ab2508fa1172c587
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 29f1e3ffb26ae9ab3e5a3aab8ef3ad296b703517bb8533b65baf269686ada5e0
[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" "29f1e3ffb26ae9ab3e5a3aab8ef3ad296b703517bb8533b65baf269686ada5e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling rustc_tools_util v0.1.0 (https://github.com/rust-lang-nursery/rust-clippy#c0c770c6)
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking tokio-executor v0.1.4
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]     Checking encoding_rs v0.8.6
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]     Checking lock_api v0.1.3
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(tool_lints)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `rustc_tools_util`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "29f1e3ffb26ae9ab3e5a3aab8ef3ad296b703517bb8533b65baf269686ada5e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29f1e3ffb26ae9ab3e5a3aab8ef3ad296b703517bb8533b65baf269686ada5e0", kill_on_drop: false }`
[INFO] [stdout] 29f1e3ffb26ae9ab3e5a3aab8ef3ad296b703517bb8533b65baf269686ada5e0