[INFO] cloning repository https://github.com/Keirua/whitespace-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Keirua/whitespace-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeirua%2Fwhitespace-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeirua%2Fwhitespace-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d0aeb9496623bf5b03edd3eb14bfdef73af54b5
[INFO] documenting Keirua/whitespace-rs against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeirua%2Fwhitespace-rs" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Keirua/whitespace-rs on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Keirua/whitespace-rs
[INFO] finished tweaking git repo https://github.com/Keirua/whitespace-rs
[INFO] tweaked toml for git repo https://github.com/Keirua/whitespace-rs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Keirua/whitespace-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 484ff2976a07cac3e74245571657bb73d5d7e544cbc452425cfafdc0ec28bc1c
[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" "484ff2976a07cac3e74245571657bb73d5d7e544cbc452425cfafdc0ec28bc1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "484ff2976a07cac3e74245571657bb73d5d7e544cbc452425cfafdc0ec28bc1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "484ff2976a07cac3e74245571657bb73d5d7e544cbc452425cfafdc0ec28bc1c", kill_on_drop: false }`
[INFO] [stdout] 484ff2976a07cac3e74245571657bb73d5d7e544cbc452425cfafdc0ec28bc1c
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] 64eeb98b6a20c23515dd4b117bb4894a56a374227c3e05c03e7d7115ee999117
[INFO] running `Command { std: "docker" "start" "-a" "64eeb98b6a20c23515dd4b117bb4894a56a374227c3e05c03e7d7115ee999117", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking whitespace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting whitespace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `BigNum`
[INFO] [stdout]  --> src/bignum.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct BigNum {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/bignum.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn new(v: Vec<i32>) -> BigNum {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/bignum.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn add(&self, b: &BigNum) -> BigNum {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.81s
[INFO] running `Command { std: "docker" "inspect" "64eeb98b6a20c23515dd4b117bb4894a56a374227c3e05c03e7d7115ee999117", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64eeb98b6a20c23515dd4b117bb4894a56a374227c3e05c03e7d7115ee999117", kill_on_drop: false }`
[INFO] [stdout] 64eeb98b6a20c23515dd4b117bb4894a56a374227c3e05c03e7d7115ee999117