[INFO] cloning repository https://github.com/ICimpoes/rusty-train
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ICimpoes/rusty-train" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FICimpoes%2Frusty-train", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FICimpoes%2Frusty-train'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5849823762ca3e361642003d886bc612bb14d8c
[INFO] documenting ICimpoes/rusty-train 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%2FICimpoes%2Frusty-train" "/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/ICimpoes/rusty-train 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/ICimpoes/rusty-train
[INFO] finished tweaking git repo https://github.com/ICimpoes/rusty-train
[INFO] tweaked toml for git repo https://github.com/ICimpoes/rusty-train written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ICimpoes/rusty-train 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]     Blocking waiting for file lock on package cache
[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] 3c216bc1def1de58e5a2d214b3000182cb4ac797fa4adda38f859c0dd2ba8cdb
[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" "3c216bc1def1de58e5a2d214b3000182cb4ac797fa4adda38f859c0dd2ba8cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c216bc1def1de58e5a2d214b3000182cb4ac797fa4adda38f859c0dd2ba8cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c216bc1def1de58e5a2d214b3000182cb4ac797fa4adda38f859c0dd2ba8cdb", kill_on_drop: false }`
[INFO] [stdout] 3c216bc1def1de58e5a2d214b3000182cb4ac797fa4adda38f859c0dd2ba8cdb
[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] [stdout] 36baa22f3f60531b8588ba0e2920487d618008092a5a02cb5629c02bc9b60632
[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" "36baa22f3f60531b8588ba0e2920487d618008092a5a02cb5629c02bc9b60632", kill_on_drop: false }`
[INFO] [stderr]     Checking rusty-train v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting rusty-train v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `middle_function`
[INFO] [stdout]  --> src/communicator/lib/mod.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn middle_function() {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `middle_secret_function`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn middle_secret_function() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_function`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         pub fn inner_function() {}
[INFO] [stdout]    |                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `secret_function`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |         fn secret_function() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_function`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |             pub fn inner_function() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try_me`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn try_me() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prints_and_returns_10`
[INFO] [stdout]   --> src/communicator/lib/mod.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn prints_and_returns_10(a: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/collections/bin/main.rs:181:14
[INFO] [stdout]     |
[INFO] [stdout] 181 |         t += (*i as f32);
[INFO] [stdout]     |              ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` 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 8.22s
[INFO] running `Command { std: "docker" "inspect" "36baa22f3f60531b8588ba0e2920487d618008092a5a02cb5629c02bc9b60632", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36baa22f3f60531b8588ba0e2920487d618008092a5a02cb5629c02bc9b60632", kill_on_drop: false }`
[INFO] [stdout] 36baa22f3f60531b8588ba0e2920487d618008092a5a02cb5629c02bc9b60632