[INFO] cloning repository https://github.com/ShaunKarran/cab403-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShaunKarran/cab403-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunKarran%2Fcab403-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunKarran%2Fcab403-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b2d984ec05b6180360b84870ed5bfebad85607f
[INFO] documenting ShaunKarran/cab403-rs 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%2FShaunKarran%2Fcab403-rs" "/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/ShaunKarran/cab403-rs 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/ShaunKarran/cab403-rs
[INFO] finished tweaking git repo https://github.com/ShaunKarran/cab403-rs
[INFO] tweaked toml for git repo https://github.com/ShaunKarran/cab403-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ShaunKarran/cab403-rs 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 atty v0.2.3
[INFO] [stderr]   Downloaded textwrap v0.8.0
[INFO] [stderr]   Downloaded clap v2.26.2
[INFO] [stderr]   Downloaded simplelog v0.4.2
[INFO] [stderr]   Downloaded threadpool v1.7.0
[INFO] [stderr]   Downloaded term_size v0.3.0
[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" "+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] 11e018d90f8f279edaf1bde4e367df757cfb6516baf6a5150c8099f1b1131ed8
[INFO] running `Command { std: "docker" "start" "-a" "11e018d90f8f279edaf1bde4e367df757cfb6516baf6a5150c8099f1b1131ed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11e018d90f8f279edaf1bde4e367df757cfb6516baf6a5150c8099f1b1131ed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11e018d90f8f279edaf1bde4e367df757cfb6516baf6a5150c8099f1b1131ed8", kill_on_drop: false }`
[INFO] [stdout] 11e018d90f8f279edaf1bde4e367df757cfb6516baf6a5150c8099f1b1131ed8
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c03b73d948ae1e9e288b2d5189a3bd45a6b907531fc9c93f5ea2e6e45560447
[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" "5c03b73d948ae1e9e288b2d5189a3bd45a6b907531fc9c93f5ea2e6e45560447", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]     Checking textwrap v0.8.0
[INFO] [stderr]     Checking threadpool v1.7.0
[INFO] [stderr]     Checking clap v2.26.2
[INFO] [stderr]     Checking simplelog v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.15
[INFO] [stderr]     Checking bincode v0.9.2
[INFO] [stderr]     Checking cab403-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting cab403-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `word_set`
[INFO] [stdout]   --> src/hangman.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn select_word(word_set: HashSet<String>) -> String {
[INFO] [stdout]    |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_set`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `word`
[INFO] [stdout]  --> src/hangman.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     word: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `word_character_set`
[INFO] [stdout]  --> src/hangman.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     word_character_set: HashSet<char>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `number_allowed_guesses`
[INFO] [stdout]  --> src/hangman.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     number_allowed_guesses: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.54s
[INFO] running `Command { std: "docker" "inspect" "5c03b73d948ae1e9e288b2d5189a3bd45a6b907531fc9c93f5ea2e6e45560447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c03b73d948ae1e9e288b2d5189a3bd45a6b907531fc9c93f5ea2e6e45560447", kill_on_drop: false }`
[INFO] [stdout] 5c03b73d948ae1e9e288b2d5189a3bd45a6b907531fc9c93f5ea2e6e45560447