[INFO] cloning repository https://github.com/andybug/rustychain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andybug/rustychain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandybug%2Frustychain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandybug%2Frustychain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2157f99ed420aff1a00cbefbd1bcc9117cef3b1
[INFO] documenting andybug/rustychain 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%2Fandybug%2Frustychain" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andybug/rustychain 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/andybug/rustychain
[INFO] finished tweaking git repo https://github.com/andybug/rustychain
[INFO] tweaked toml for git repo https://github.com/andybug/rustychain written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/andybug/rustychain 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] 52654e5da03d485eac8f315d10b194196cb34681a3420eabe671f326bb1b7c61
[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" "52654e5da03d485eac8f315d10b194196cb34681a3420eabe671f326bb1b7c61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52654e5da03d485eac8f315d10b194196cb34681a3420eabe671f326bb1b7c61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52654e5da03d485eac8f315d10b194196cb34681a3420eabe671f326bb1b7c61", kill_on_drop: false }`
[INFO] [stdout] 52654e5da03d485eac8f315d10b194196cb34681a3420eabe671f326bb1b7c61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 8722aa340aed1aeb4462c7067cf3d1ae8729aac5b2ce8f8cc161e62639f86b10
[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" "8722aa340aed1aeb4462c7067cf3d1ae8729aac5b2ce8f8cc161e62639f86b10", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.9.0
[INFO] [stderr]     Checking odds v0.2.25
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]     Checking linked-hash-map v0.4.2
[INFO] [stderr]     Checking serde v1.0.14
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking nodrop v0.1.9
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking generic-array v0.8.3
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]     Checking digest v0.6.2
[INFO] [stderr]     Checking crypto-mac v0.4.0
[INFO] [stderr]     Checking blake2 v0.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.14
[INFO] [stderr]     Checking serde_yaml v0.7.1
[INFO] [stderr]  Documenting rustychain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Merkle_root` should have an upper camel case name
[INFO] [stdout]   --> src/blockchain/block.rs:88:52
[INFO] [stdout]    |
[INFO] [stdout] 88 |         enum Field { Version, Timestamp, Previous, Merkle_root };
[INFO] [stdout]    |                                                    ^^^^^^^^^^^ help: convert the identifier to upper camel case: `MerkleRoot`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.32s
[INFO] running `Command { std: "docker" "inspect" "8722aa340aed1aeb4462c7067cf3d1ae8729aac5b2ce8f8cc161e62639f86b10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8722aa340aed1aeb4462c7067cf3d1ae8729aac5b2ce8f8cc161e62639f86b10", kill_on_drop: false }`
[INFO] [stdout] 8722aa340aed1aeb4462c7067cf3d1ae8729aac5b2ce8f8cc161e62639f86b10