[INFO] cloning repository https://github.com/ShaunApps/learning-rust-and-bitcoin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShaunApps/learning-rust-and-bitcoin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunApps%2Flearning-rust-and-bitcoin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunApps%2Flearning-rust-and-bitcoin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 207a360e16ae950e857e17ff2fe5acd2b55af0cd
[INFO] documenting ShaunApps/learning-rust-and-bitcoin against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunApps%2Flearning-rust-and-bitcoin" "/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/ShaunApps/learning-rust-and-bitcoin on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShaunApps/learning-rust-and-bitcoin
[INFO] finished tweaking git repo https://github.com/ShaunApps/learning-rust-and-bitcoin
[INFO] tweaked toml for git repo https://github.com/ShaunApps/learning-rust-and-bitcoin written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/ShaunApps/learning-rust-and-bitcoin already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.46.0" "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] e4653771467715b15178a24360de79fe8919fc9969fab2ebc323e2c57b7bf087
[INFO] running `Command { std: "docker" "start" "-a" "e4653771467715b15178a24360de79fe8919fc9969fab2ebc323e2c57b7bf087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4653771467715b15178a24360de79fe8919fc9969fab2ebc323e2c57b7bf087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4653771467715b15178a24360de79fe8919fc9969fab2ebc323e2c57b7bf087", kill_on_drop: false }`
[INFO] [stdout] e4653771467715b15178a24360de79fe8919fc9969fab2ebc323e2c57b7bf087
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b987797e28f06d210578ad632d285ea9e653cf8d94943988d262aca4a968f090
[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" "b987797e28f06d210578ad632d285ea9e653cf8d94943988d262aca4a968f090", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.21
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]     Checking string v0.1.0
[INFO] [stderr]     Checking arrayref v0.3.4
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking log v0.4.2
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking digest v0.7.2
[INFO] [stderr]     Checking http v0.1.6
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking mio v0.6.14
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking want v0.0.5
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-threadpool v0.1.4
[INFO] [stderr]     Checking tokio-timer v0.2.4
[INFO] [stderr]     Checking tokio-reactor v0.1.2
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking h2 v0.1.10
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.1
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]     Checking hyper v0.12.2
[INFO] [stderr]     Checking serde_json v1.0.21
[INFO] [stderr]  Documenting crypto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.53s
[INFO] running `Command { std: "docker" "inspect" "b987797e28f06d210578ad632d285ea9e653cf8d94943988d262aca4a968f090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b987797e28f06d210578ad632d285ea9e653cf8d94943988d262aca4a968f090", kill_on_drop: false }`
[INFO] [stdout] b987797e28f06d210578ad632d285ea9e653cf8d94943988d262aca4a968f090