[INFO] cloning repository https://github.com/devalexwhite/rust-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/devalexwhite/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevalexwhite%2Frust-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevalexwhite%2Frust-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3fdc05fb854bd284a01d453fa2e26c619bdd257
[INFO] checking devalexwhite/rust-sudoku against master#377656d3dd3f9c23a9c8713e163f4365a5261a84 for pr-146470-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevalexwhite%2Frust-sudoku" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/devalexwhite/rust-sudoku
[INFO] finished tweaking git repo https://github.com/devalexwhite/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/devalexwhite/rust-sudoku written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/devalexwhite/rust-sudoku on toolchain 377656d3dd3f9c23a9c8713e163f4365a5261a84
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/devalexwhite/rust-sudoku 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" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-joining-type v0.7.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34ead6388eed284220365c6931bacde4c20f733f25a89f886804037f7cc09b83
[INFO] running `Command { std: "docker" "start" "-a" "34ead6388eed284220365c6931bacde4c20f733f25a89f886804037f7cc09b83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34ead6388eed284220365c6931bacde4c20f733f25a89f886804037f7cc09b83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ead6388eed284220365c6931bacde4c20f733f25a89f886804037f7cc09b83", kill_on_drop: false }`
[INFO] [stdout] 34ead6388eed284220365c6931bacde4c20f733f25a89f886804037f7cc09b83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 090c015b6203070c9a6053f92aaaaca9f8604935b332fc0f6443361ac81a3961
[INFO] running `Command { std: "docker" "start" "-a" "090c015b6203070c9a6053f92aaaaca9f8604935b332fc0f6443361ac81a3961", kill_on_drop: false }`
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[INFO] [stderr]     Checking svg2pdf v0.13.0
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[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]   --> src/main.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 | /                 [0; 11].map(|_| {
[INFO] [stdout] 76 | |                     row.push_element(if i == 80 {
[INFO] [stdout] 77 | |                         genpdf::elements::Break::new(1)
[INFO] [stdout] 78 | |                     } else {
[INFO] [stdout] 79 | |                         genpdf::elements::Break::new(2)
[INFO] [stdout] 80 | |                     })
[INFO] [stdout] 81 | |                 });
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = [0; 11].map(|_| {
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]   --> src/main.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 | /                 [0; 11].map(|_| {
[INFO] [stdout] 76 | |                     row.push_element(if i == 80 {
[INFO] [stdout] 77 | |                         genpdf::elements::Break::new(1)
[INFO] [stdout] 78 | |                     } else {
[INFO] [stdout] 79 | |                         genpdf::elements::Break::new(2)
[INFO] [stdout] 80 | |                     })
[INFO] [stdout] 81 | |                 });
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = [0; 11].map(|_| {
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 52.83s
[INFO] running `Command { std: "docker" "inspect" "090c015b6203070c9a6053f92aaaaca9f8604935b332fc0f6443361ac81a3961", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "090c015b6203070c9a6053f92aaaaca9f8604935b332fc0f6443361ac81a3961", kill_on_drop: false }`
[INFO] [stdout] 090c015b6203070c9a6053f92aaaaca9f8604935b332fc0f6443361ac81a3961