[INFO] cloning repository https://github.com/TheRiven/mazegenerator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TheRiven/mazegenerator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRiven%2Fmazegenerator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRiven%2Fmazegenerator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9e021d139b3ec222eae371c8cfb95033e6e5a168
[INFO] testing TheRiven/mazegenerator against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRiven%2Fmazegenerator" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TheRiven/mazegenerator on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TheRiven/mazegenerator
[INFO] finished tweaking git repo https://github.com/TheRiven/mazegenerator
[INFO] tweaked toml for git repo https://github.com/TheRiven/mazegenerator written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/TheRiven/mazegenerator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded adler32 v1.0.2
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.14
[INFO] [stderr]   Downloaded inflate v0.3.4
[INFO] [stderr]   Downloaded either v1.4.0
[INFO] [stderr]   Downloaded rayon v1.0.1
[INFO] [stderr]   Downloaded image v0.18.0
[INFO] [stderr]   Downloaded deflate v0.7.17
[INFO] [stderr]   Downloaded png v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1dc3d4c0a6ab4f974894e355f188f98048f9368c779bf472b7781bae79c71c4d
[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" "1dc3d4c0a6ab4f974894e355f188f98048f9368c779bf472b7781bae79c71c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dc3d4c0a6ab4f974894e355f188f98048f9368c779bf472b7781bae79c71c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dc3d4c0a6ab4f974894e355f188f98048f9368c779bf472b7781bae79c71c4d", kill_on_drop: false }`
[INFO] [stdout] 1dc3d4c0a6ab4f974894e355f188f98048f9368c779bf472b7781bae79c71c4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92f531061b458e87966203799233ad4540a8c3cf91f0c3657d35562968c860a5
[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" "92f531061b458e87966203799233ad4540a8c3cf91f0c3657d35562968c860a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling adler32 v1.0.2
[INFO] [stderr]    Compiling either v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling deflate v0.7.17
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling mazegenerator v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 86 - fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout] 86 + fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> (&'a Cell, Direction) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 92 -     (chosen)
[INFO] [stdout] 92 +     chosen
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 25 -     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout] 25 +     pub fn get_cell(&self, x: u32, y: u32) -> Option<&Cell> {
[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 17.46s
[INFO] running `Command { std: "docker" "inspect" "92f531061b458e87966203799233ad4540a8c3cf91f0c3657d35562968c860a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92f531061b458e87966203799233ad4540a8c3cf91f0c3657d35562968c860a5", kill_on_drop: false }`
[INFO] [stdout] 92f531061b458e87966203799233ad4540a8c3cf91f0c3657d35562968c860a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f3553ed1379972fc28e826fff87f3fe313e9292e8ec5435179b53cc1bd8f58a
[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" "2f3553ed1379972fc28e826fff87f3fe313e9292e8ec5435179b53cc1bd8f58a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mazegenerator v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 86 - fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout] 86 + fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> (&'a Cell, Direction) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 92 -     (chosen)
[INFO] [stdout] 92 +     chosen
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 25 -     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout] 25 +     pub fn get_cell(&self, x: u32, y: u32) -> Option<&Cell> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 86 - fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout] 86 + fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> (&'a Cell, Direction) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 92 -     (chosen)
[INFO] [stdout] 92 +     chosen
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 25 -     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout] 25 +     pub fn get_cell(&self, x: u32, y: u32) -> Option<&Cell> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `Command { std: "docker" "inspect" "2f3553ed1379972fc28e826fff87f3fe313e9292e8ec5435179b53cc1bd8f58a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f3553ed1379972fc28e826fff87f3fe313e9292e8ec5435179b53cc1bd8f58a", kill_on_drop: false }`
[INFO] [stdout] 2f3553ed1379972fc28e826fff87f3fe313e9292e8ec5435179b53cc1bd8f58a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", 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] 4f04100dae446d2d30c99834e99811f585e29e0be66a1e6b4042586454444ad1
[INFO] running `Command { std: "docker" "start" "-a" "4f04100dae446d2d30c99834e99811f585e29e0be66a1e6b4042586454444ad1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr]    |                                                                          ^                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 86 - fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr] 86 + fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> (&'a Cell, Direction) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     (chosen)
[INFO] [stderr]    |     ^      ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 92 -     (chosen)
[INFO] [stderr] 92 +     chosen
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr]    |                                                      ^     ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 25 -     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr] 25 +     pub fn get_cell(&self, x: u32, y: u32) -> Option<&Cell> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `mazegenerator` (lib) generated 3 warnings
[INFO] [stderr] warning: `mazegenerator` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mazegenerator-de3fe5107caf8ad8)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test mazebuilder::tests::test_dfs_10_10 ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_15_23 ... ok
[INFO] [stdout] test mazebuilder::tests::test_kruskal_10_10 ... ok
[INFO] [stdout] test mazebuilder::tests::test_generate_maze_selector ... ok
[INFO] [stdout] test mazebuilder::tests::test_kruskal_15_23 ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_imperfect ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_100_100 ... ok
[INFO] [stdout] test mazebuilder::tests::test_kruskal_imperfect ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mazegenerator-46d9dc1049cd947f)
[INFO] [stdout] test mazebuilder::tests::test_kruskal_100_100 ... ok
[INFO] [stderr]    Doc-tests mazegenerator
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/dfs.rs:86:74
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr]    |                                                                          ^                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 86 - fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr] 86 + fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> (&'a Cell, Direction) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/dfs.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     (chosen)
[INFO] [stderr]    |     ^      ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 92 -     (chosen)
[INFO] [stderr] 92 +     chosen
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/maze.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr]    |                                                      ^     ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 25 -     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr] 25 +     pub fn get_cell(&self, x: u32, y: u32) -> Option<&Cell> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4f04100dae446d2d30c99834e99811f585e29e0be66a1e6b4042586454444ad1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f04100dae446d2d30c99834e99811f585e29e0be66a1e6b4042586454444ad1", kill_on_drop: false }`
[INFO] [stdout] 4f04100dae446d2d30c99834e99811f585e29e0be66a1e6b4042586454444ad1