[INFO] cloning repository https://github.com/eyluo/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eyluo/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyluo%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyluo%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb330820ca48c871497681557c93bb3ab6637f69
[INFO] documenting eyluo/rustlings against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyluo%2Frustlings" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eyluo/rustlings on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eyluo/rustlings
[INFO] finished tweaking git repo https://github.com/eyluo/rustlings
[INFO] tweaked toml for git repo https://github.com/eyluo/rustlings written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/eyluo/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 640d0ed61f783ce7d81879c02bb16a781586265767593e8474222eb8ff96fb8d
[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" "640d0ed61f783ce7d81879c02bb16a781586265767593e8474222eb8ff96fb8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "640d0ed61f783ce7d81879c02bb16a781586265767593e8474222eb8ff96fb8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "640d0ed61f783ce7d81879c02bb16a781586265767593e8474222eb8ff96fb8d", kill_on_drop: false }`
[INFO] [stdout] 640d0ed61f783ce7d81879c02bb16a781586265767593e8474222eb8ff96fb8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5bed240db0c3f9cde1be67c38016086d40a5cc943ad835c83a25607c4bb0dbbb
[INFO] running `Command { std: "docker" "start" "-a" "5bed240db0c3f9cde1be67c38016086d40a5cc943ad835c83a25607c4bb0dbbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking memchr v2.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.12
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking console v0.7.5
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]  Documenting rustlings v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.85s
[INFO] running `Command { std: "docker" "inspect" "5bed240db0c3f9cde1be67c38016086d40a5cc943ad835c83a25607c4bb0dbbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bed240db0c3f9cde1be67c38016086d40a5cc943ad835c83a25607c4bb0dbbb", kill_on_drop: false }`
[INFO] [stdout] 5bed240db0c3f9cde1be67c38016086d40a5cc943ad835c83a25607c4bb0dbbb