[INFO] cloning repository https://github.com/raghavendra-nataraj/rustling-solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raghavendra-nataraj/rustling-solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraghavendra-nataraj%2Frustling-solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraghavendra-nataraj%2Frustling-solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ea9e790fe1611836d83b83a64083ab9f45c8ee0
[INFO] documenting raghavendra-nataraj/rustling-solution 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%2Fraghavendra-nataraj%2Frustling-solution" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raghavendra-nataraj/rustling-solution 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/raghavendra-nataraj/rustling-solution
[INFO] finished tweaking git repo https://github.com/raghavendra-nataraj/rustling-solution
[INFO] tweaked toml for git repo https://github.com/raghavendra-nataraj/rustling-solution written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/raghavendra-nataraj/rustling-solution 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 09cba9c8a7c31a5fca3ecc185619a2051ffdebd87051a661270a33a9fa057e49
[INFO] running `Command { std: "docker" "start" "-a" "09cba9c8a7c31a5fca3ecc185619a2051ffdebd87051a661270a33a9fa057e49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09cba9c8a7c31a5fca3ecc185619a2051ffdebd87051a661270a33a9fa057e49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09cba9c8a7c31a5fca3ecc185619a2051ffdebd87051a661270a33a9fa057e49", kill_on_drop: false }`
[INFO] [stdout] 09cba9c8a7c31a5fca3ecc185619a2051ffdebd87051a661270a33a9fa057e49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cd39de822608a5b906d5ff7817bb96819bdf03549591ec12f121ea8291112415
[INFO] running `Command { std: "docker" "start" "-a" "cd39de822608a5b906d5ff7817bb96819bdf03549591ec12f121ea8291112415", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking inotify v0.7.0
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking console v0.8.0
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]  Documenting rustlings v3.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.14s
[INFO] running `Command { std: "docker" "inspect" "cd39de822608a5b906d5ff7817bb96819bdf03549591ec12f121ea8291112415", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd39de822608a5b906d5ff7817bb96819bdf03549591ec12f121ea8291112415", kill_on_drop: false }`
[INFO] [stdout] cd39de822608a5b906d5ff7817bb96819bdf03549591ec12f121ea8291112415