[INFO] cloning repository https://github.com/kunalmohan/rustlings-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kunalmohan/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkunalmohan%2Frustlings-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkunalmohan%2Frustlings-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f42b24f539ce1b5167dad69b1d15bb483a2966d
[INFO] documenting kunalmohan/rustlings-solutions 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%2Fkunalmohan%2Frustlings-solutions" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kunalmohan/rustlings-solutions 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/kunalmohan/rustlings-solutions
[INFO] finished tweaking git repo https://github.com/kunalmohan/rustlings-solutions
[INFO] tweaked toml for git repo https://github.com/kunalmohan/rustlings-solutions written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/kunalmohan/rustlings-solutions 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]  Downloading crates ...
[INFO] [stderr]   Downloaded float-cmp v0.4.0
[INFO] [stderr]   Downloaded normalize-line-endings v0.2.2
[INFO] [stderr]   Downloaded escargot v0.4.0
[INFO] [stderr]   Downloaded predicates v1.0.1
[INFO] [stderr]   Downloaded console v0.6.2
[INFO] [stderr]   Downloaded difference v2.0.0
[INFO] [stderr]   Downloaded assert_cmd v0.11.1
[INFO] [stderr]   Downloaded clicolors-control v1.0.0
[INFO] [stderr]   Downloaded console v0.7.5
[INFO] [stderr]   Downloaded predicates-core v1.0.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.0
[INFO] [stderr]   Downloaded treeline v0.1.0
[INFO] [stderr]   Downloaded indicatif v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 4eca1df7c11c1450865a126b0947cdc3009300dd8e0a9a65c0e574522bb8a45c
[INFO] running `Command { std: "docker" "start" "-a" "4eca1df7c11c1450865a126b0947cdc3009300dd8e0a9a65c0e574522bb8a45c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4eca1df7c11c1450865a126b0947cdc3009300dd8e0a9a65c0e574522bb8a45c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eca1df7c11c1450865a126b0947cdc3009300dd8e0a9a65c0e574522bb8a45c", kill_on_drop: false }`
[INFO] [stdout] 4eca1df7c11c1450865a126b0947cdc3009300dd8e0a9a65c0e574522bb8a45c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] f6d92cd9fe66faba91a4f1cfe759a989d015010e419558b27bbdf5d565e2ab9e
[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" "f6d92cd9fe66faba91a4f1cfe759a989d015010e419558b27bbdf5d565e2ab9e", kill_on_drop: false }`
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking console v0.7.5
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]     Checking notify v4.0.12
[INFO] [stderr]  Documenting rustlings v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.45s
[INFO] running `Command { std: "docker" "inspect" "f6d92cd9fe66faba91a4f1cfe759a989d015010e419558b27bbdf5d565e2ab9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6d92cd9fe66faba91a4f1cfe759a989d015010e419558b27bbdf5d565e2ab9e", kill_on_drop: false }`
[INFO] [stdout] f6d92cd9fe66faba91a4f1cfe759a989d015010e419558b27bbdf5d565e2ab9e