[INFO] cloning repository https://github.com/adwd/math-algorithm-book-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adwd/math-algorithm-book-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadwd%2Fmath-algorithm-book-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadwd%2Fmath-algorithm-book-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4002559c70abe414d7ac6d60f926461796ff4c92
[INFO] checking adwd/math-algorithm-book-rust against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadwd%2Fmath-algorithm-book-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/adwd/math-algorithm-book-rust
[INFO] finished tweaking git repo https://github.com/adwd/math-algorithm-book-rust
[INFO] tweaked toml for git repo https://github.com/adwd/math-algorithm-book-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/adwd/math-algorithm-book-rust on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/adwd/math-algorithm-book-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proconio v0.3.8
[INFO] [stderr]   Downloaded proconio-derive v0.1.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd3d208240d6cff1eec62d768be6ed8ac8146eb7b869d523ffb7117648a204fd
[INFO] running `Command { std: "docker" "start" "-a" "dd3d208240d6cff1eec62d768be6ed8ac8146eb7b869d523ffb7117648a204fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd3d208240d6cff1eec62d768be6ed8ac8146eb7b869d523ffb7117648a204fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd3d208240d6cff1eec62d768be6ed8ac8146eb7b869d523ffb7117648a204fd", kill_on_drop: false }`
[INFO] [stdout] dd3d208240d6cff1eec62d768be6ed8ac8146eb7b869d523ffb7117648a204fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTFLAGS=--cap-lints=forbid" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31f4faf248319c1b9f4b6e71ccf6776fcc28466a8b4fc3c76752c1e25cbeefc9
[INFO] running `Command { std: "docker" "start" "-a" "31f4faf248319c1b9f4b6e71ccf6776fcc28466a8b4fc3c76752c1e25cbeefc9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling proconio-derive v0.1.9
[INFO] [stderr]     Checking proconio v0.3.8
[INFO] [stderr]     Checking math-algorithm-book-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/ch03/id_029.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout]    |                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout] 22 +         arr[i] = arr[i - 1 ] + arr[(i - 2)];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/ch03/id_029.rs:22:37
[INFO] [stdout]    |
[INFO] [stdout] 22 |         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout]    |                                     ^     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout] 22 +         arr[i] = arr[(i - 1)] + arr[i - 2 ];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/ch04/id_046.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/ch05/id_067.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/ch03/id_029.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout]    |                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout] 22 +         arr[i] = arr[i - 1 ] + arr[(i - 2)];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/ch03/id_029.rs:22:37
[INFO] [stdout]    |
[INFO] [stdout] 22 |         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout]    |                                     ^     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         arr[i] = arr[(i - 1)] + arr[(i - 2)];
[INFO] [stdout] 22 +         arr[i] = arr[(i - 1)] + arr[i - 2 ];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ch03/id_032.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn solve(n: usize, x: usize, a: &[usize]) -> bool {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ch03/id_032.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn solve(n: usize, x: usize, a: &[usize]) -> bool {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/ch05/id_080.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn dijkstra(n: usize, m: usize, adj: &[Vec<(usize, usize)>]) -> Vec<usize> {
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/ch05/id_080.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn dijkstra(n: usize, m: usize, adj: &[Vec<(usize, usize)>]) -> Vec<usize> {
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `Command { std: "docker" "inspect" "31f4faf248319c1b9f4b6e71ccf6776fcc28466a8b4fc3c76752c1e25cbeefc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f4faf248319c1b9f4b6e71ccf6776fcc28466a8b4fc3c76752c1e25cbeefc9", kill_on_drop: false }`
[INFO] [stdout] 31f4faf248319c1b9f4b6e71ccf6776fcc28466a8b4fc3c76752c1e25cbeefc9