[INFO] cloning repository https://github.com/ActionCactus/Rust-Exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ActionCactus/Rust-Exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FActionCactus%2FRust-Exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FActionCactus%2FRust-Exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 708a637c1caa633f41a9035cfe322e951c039767
[INFO] documenting ActionCactus/Rust-Exercises against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FActionCactus%2FRust-Exercises" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ActionCactus/Rust-Exercises on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ActionCactus/Rust-Exercises
[INFO] finished tweaking git repo https://github.com/ActionCactus/Rust-Exercises
[INFO] tweaked toml for git repo https://github.com/ActionCactus/Rust-Exercises written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ActionCactus/Rust-Exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8602aa10dc640167aa2b3e8eaa8cf46fe7f62b653cf945c8f125912631ef11a
[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" "c8602aa10dc640167aa2b3e8eaa8cf46fe7f62b653cf945c8f125912631ef11a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8602aa10dc640167aa2b3e8eaa8cf46fe7f62b653cf945c8f125912631ef11a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8602aa10dc640167aa2b3e8eaa8cf46fe7f62b653cf945c8f125912631ef11a", kill_on_drop: false }`
[INFO] [stdout] c8602aa10dc640167aa2b3e8eaa8cf46fe7f62b653cf945c8f125912631ef11a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd264c92b7d1d8eb88e98f2a4c82fefabd4e05737db1d9056c9ffc78fb84f1d0
[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" "bd264c92b7d1d8eb88e98f2a4c82fefabd4e05737db1d9056c9ffc78fb84f1d0", kill_on_drop: false }`
[INFO] [stderr]  Documenting cargo_bin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "bd264c92b7d1d8eb88e98f2a4c82fefabd4e05737db1d9056c9ffc78fb84f1d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd264c92b7d1d8eb88e98f2a4c82fefabd4e05737db1d9056c9ffc78fb84f1d0", kill_on_drop: false }`
[INFO] [stdout] bd264c92b7d1d8eb88e98f2a4c82fefabd4e05737db1d9056c9ffc78fb84f1d0