[INFO] cloning repository https://github.com/TreeTopThinking/rust-ant-maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TreeTopThinking/rust-ant-maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTreeTopThinking%2Frust-ant-maze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTreeTopThinking%2Frust-ant-maze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7250153d72877dd01fa5b7e40296fe98e2427ac0
[INFO] checking TreeTopThinking/rust-ant-maze against 7211ea594cbf137ef6118b1752b959dea7cb9088 for pr-164148-crater-rollup
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTreeTopThinking%2Frust-ant-maze" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TreeTopThinking/rust-ant-maze
[INFO] finished tweaking git repo https://github.com/TreeTopThinking/rust-ant-maze
[INFO] tweaked toml for git repo https://github.com/TreeTopThinking/rust-ant-maze written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TreeTopThinking/rust-ant-maze on toolchain 7211ea594cbf137ef6118b1752b959dea7cb9088
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7211ea594cbf137ef6118b1752b959dea7cb9088" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TreeTopThinking/rust-ant-maze 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" "+7211ea594cbf137ef6118b1752b959dea7cb9088" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded audrey v0.3.0
[INFO] [stderr]   Downloaded quad-alsa-sys v0.3.2
[INFO] [stderr]   Downloaded ogg v0.7.1
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[INFO] [stderr]   Downloaded gif-dispose v3.1.1
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[INFO] [stderr]   Downloaded macroquad v0.4.16
[INFO] [stderr]   Downloaded quad-gif v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a
[INFO] running `Command { std: "docker" "start" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a" "/opt/rustwide/cargo-home/bin/cargo" "+7211ea594cbf137ef6118b1752b959dea7cb9088" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a" "/opt/rustwide/cargo-home/bin/cargo" "+7211ea594cbf137ef6118b1752b959dea7cb9088" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling quad-alsa-sys v0.3.2
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[INFO] [stderr]     Checking smallvec v0.6.14
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[INFO] [stderr]     Checking maze-gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::dfs_gen::DfsMazeGen`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::dfs_gen::DfsMazeGen;
[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: `crate::dfs_gen::DfsMazeGen`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::dfs_gen::DfsMazeGen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DfsMazeGen` is never constructed
[INFO] [stdout]  --> src/dfs_gen.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct DfsMazeGen<const COLS: usize, const ROWS: usize> {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `pick_neighbor`, `move_current`, and `generate` are never used
[INFO] [stdout]   --> src/dfs_gen.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<const COLS: usize, const ROWS: usize> DfsMazeGen<{ COLS }, { ROWS }> {
[INFO] [stdout]    | ------------------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn pick_neighbor(&mut self) -> Option<Cell> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn move_current(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn generate(&mut self) -> [[Cell; COLS]; ROWS] {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DfsMazeGen` is never constructed
[INFO] [stdout]  --> src/dfs_gen.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct DfsMazeGen<const COLS: usize, const ROWS: usize> {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `pick_neighbor`, `move_current`, and `generate` are never used
[INFO] [stdout]   --> src/dfs_gen.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<const COLS: usize, const ROWS: usize> DfsMazeGen<{ COLS }, { ROWS }> {
[INFO] [stdout]    | ------------------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn pick_neighbor(&mut self) -> Option<Cell> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn move_current(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn generate(&mut self) -> [[Cell; COLS]; ROWS] {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.26s
[INFO] running `Command { std: "docker" "inspect" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a", kill_on_drop: false }`
[INFO] [stdout] e1aeb0101a43e9456b36e8f7a3541bd93c9714aa88ae601660525e8748e6ab4a
