[INFO] fetching crate chess_perft 3.1.1...
[INFO] documenting chess_perft-3.1.1 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate chess_perft 3.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate chess_perft 3.1.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking crates.io crate chess_perft 3.1.1
[INFO] finished tweaking crates.io crate chess_perft 3.1.1
[INFO] tweaked toml for crates.io crate chess_perft 3.1.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate chess_perft 3.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8bb7fe7c11cb027ef2619c84f4bf3c00a76f6b90568d3d986fea9e6d7f0535d
[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" "a8bb7fe7c11cb027ef2619c84f4bf3c00a76f6b90568d3d986fea9e6d7f0535d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8bb7fe7c11cb027ef2619c84f4bf3c00a76f6b90568d3d986fea9e6d7f0535d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8bb7fe7c11cb027ef2619c84f4bf3c00a76f6b90568d3d986fea9e6d7f0535d", kill_on_drop: false }`
[INFO] [stdout] a8bb7fe7c11cb027ef2619c84f4bf3c00a76f6b90568d3d986fea9e6d7f0535d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 140e7ebdc70ee07282453705e61fbffe39305cc647f00a4bd389bb1a0a01e445
[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" "140e7ebdc70ee07282453705e61fbffe39305cc647f00a4bd389bb1a0a01e445", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking rustc-demangle v0.1.14
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling shakmaty v0.15.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking getopts v0.2.19
[INFO] [stderr]    Compiling backtrace v0.3.26
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]     Checking btoi v0.4.0
[INFO] [stderr]    Compiling chess v3.1.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]  Documenting chess_perft v3.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 4m 48s
[INFO] running `Command { std: "docker" "inspect" "140e7ebdc70ee07282453705e61fbffe39305cc647f00a4bd389bb1a0a01e445", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "140e7ebdc70ee07282453705e61fbffe39305cc647f00a4bd389bb1a0a01e445", kill_on_drop: false }`
[INFO] [stdout] 140e7ebdc70ee07282453705e61fbffe39305cc647f00a4bd389bb1a0a01e445
