[INFO] cloning repository https://github.com/suguni/maze-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suguni/maze-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuguni%2Fmaze-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuguni%2Fmaze-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 133b9c4e2bba62a48ea5a0f583861ed96b223a5a
[INFO] checking suguni/maze-rs against master#c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuguni%2Fmaze-rs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/suguni/maze-rs on toolchain c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/suguni/maze-rs
[INFO] finished tweaking git repo https://github.com/suguni/maze-rs
[INFO] tweaked toml for git repo https://github.com/suguni/maze-rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/suguni/maze-rs 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" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "fetch" "--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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db8ad4cd5afb9cf8a029c49c744c82a3a97ffae134060f8fd9e5f9536e20f994
[INFO] running `Command { std: "docker" "start" "-a" "db8ad4cd5afb9cf8a029c49c744c82a3a97ffae134060f8fd9e5f9536e20f994", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db8ad4cd5afb9cf8a029c49c744c82a3a97ffae134060f8fd9e5f9536e20f994", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db8ad4cd5afb9cf8a029c49c744c82a3a97ffae134060f8fd9e5f9536e20f994", kill_on_drop: false }`
[INFO] [stdout] db8ad4cd5afb9cf8a029c49c744c82a3a97ffae134060f8fd9e5f9536e20f994
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 496150b2b1a7fabfd6ab2aa5ab218980e166ee07f5b1510a344d0f335f2169c0
[INFO] running `Command { std: "docker" "start" "-a" "496150b2b1a7fabfd6ab2aa5ab218980e166ee07f5b1510a344d0f335f2169c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.14
[INFO] [stderr]     Checking svg v0.10.0
[INFO] [stderr]     Checking radix_fmt v1.0.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking maze-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `svg`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use svg;
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `svg`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use svg;
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `line` is never used
[INFO] [stdout]  --> src/export_svg.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn line<U>(x1: U, y1: U, x2: U, y2: U, style: &str) -> Line
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_svg` is never used
[INFO] [stdout]   --> src/export_svg.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn to_svg(grid: Grid, cell_size: usize) -> Document {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `links` and `neighbor` are never used
[INFO] [stdout]   --> src/grid.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl GridCell {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn links(&self) -> std::slice::Iter<'_, Weak<RefCell<GridCell>>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn neighbor(&self, dir: Dir) -> &Option<Weak<RefCell<GridCell>>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `line` is never used
[INFO] [stdout]  --> src/export_svg.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn line<U>(x1: U, y1: U, x2: U, y2: U, style: &str) -> Line
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_svg` is never used
[INFO] [stdout]   --> src/export_svg.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn to_svg(grid: Grid, cell_size: usize) -> Document {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `neighbor` is never used
[INFO] [stdout]   --> src/grid.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl GridCell {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn neighbor(&self, dir: Dir) -> &Option<Weak<RefCell<GridCell>>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.94s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: svg v0.10.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "496150b2b1a7fabfd6ab2aa5ab218980e166ee07f5b1510a344d0f335f2169c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "496150b2b1a7fabfd6ab2aa5ab218980e166ee07f5b1510a344d0f335f2169c0", kill_on_drop: false }`
[INFO] [stdout] 496150b2b1a7fabfd6ab2aa5ab218980e166ee07f5b1510a344d0f335f2169c0