[INFO] cloning repository https://github.com/kcexn/rust_string_reversal
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kcexn/rust_string_reversal" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkcexn%2Frust_string_reversal", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkcexn%2Frust_string_reversal'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5540d3d54d024ec59ed418a1bf62b12cb8741c70
[INFO] documenting kcexn/rust_string_reversal 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%2Fkcexn%2Frust_string_reversal" "/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/kcexn/rust_string_reversal 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/kcexn/rust_string_reversal
[INFO] finished tweaking git repo https://github.com/kcexn/rust_string_reversal
[INFO] tweaked toml for git repo https://github.com/kcexn/rust_string_reversal written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/kcexn/rust_string_reversal 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] 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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98293e30cb8870f8263e782f992835fb434d84c98fde0a78bde3636313a70e45
[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" "98293e30cb8870f8263e782f992835fb434d84c98fde0a78bde3636313a70e45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98293e30cb8870f8263e782f992835fb434d84c98fde0a78bde3636313a70e45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98293e30cb8870f8263e782f992835fb434d84c98fde0a78bde3636313a70e45", kill_on_drop: false }`
[INFO] [stdout] 98293e30cb8870f8263e782f992835fb434d84c98fde0a78bde3636313a70e45
[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" "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] 92143cba4209cb054f62bb66f971b52902885de78a32e8584ffed9701fb533a1
[INFO] running `Command { std: "docker" "start" "-a" "92143cba4209cb054f62bb66f971b52902885de78a32e8584ffed9701fb533a1", kill_on_drop: false }`
[INFO] [stderr]  Documenting string_reversal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "92143cba4209cb054f62bb66f971b52902885de78a32e8584ffed9701fb533a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92143cba4209cb054f62bb66f971b52902885de78a32e8584ffed9701fb533a1", kill_on_drop: false }`
[INFO] [stdout] 92143cba4209cb054f62bb66f971b52902885de78a32e8584ffed9701fb533a1