[INFO] cloning repository https://github.com/cambyse/cross_me_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cambyse/cross_me_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcambyse%2Fcross_me_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcambyse%2Fcross_me_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e807cb87adbeba45f63e225013818a7f25cf454a
[INFO] testing cambyse/cross_me_solver against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcambyse%2Fcross_me_solver" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cambyse/cross_me_solver on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cambyse/cross_me_solver
[INFO] finished tweaking git repo https://github.com/cambyse/cross_me_solver
[INFO] tweaked toml for git repo https://github.com/cambyse/cross_me_solver written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/cambyse/cross_me_solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fb220aca7a313c3a6962cea06e3feb3f3b8fd9e5c0ba172063c39d820c9daf1
[INFO] running `Command { std: "docker" "start" "-a" "5fb220aca7a313c3a6962cea06e3feb3f3b8fd9e5c0ba172063c39d820c9daf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb220aca7a313c3a6962cea06e3feb3f3b8fd9e5c0ba172063c39d820c9daf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb220aca7a313c3a6962cea06e3feb3f3b8fd9e5c0ba172063c39d820c9daf1", kill_on_drop: false }`
[INFO] [stdout] 5fb220aca7a313c3a6962cea06e3feb3f3b8fd9e5c0ba172063c39d820c9daf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd3431589e3410cae7360dbb958a11939a528b44a0e88c5881a9c1019d9c920b
[INFO] running `Command { std: "docker" "start" "-a" "fd3431589e3410cae7360dbb958a11939a528b44a0e88c5881a9c1019d9c920b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling matrixmultiply v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling ndarray v0.15.3
[INFO] [stderr]    Compiling cross_me_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::prelude::*`
[INFO] [stdout]  --> src/problems.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ndarray::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/problems.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec::Vec`
[INFO] [stdout]  --> src/problems.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/problems.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:129:55
[INFO] [stdout]     |
[INFO] [stdout] 129 |             (0, 1) => { n_filled+=1; islands.push(1); last = state[i]},
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:130:26
[INFO] [stdout]     |
[INFO] [stdout] 130 |             (0, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:132:72
[INFO] [stdout]     |
[INFO] [stdout] 132 |             (1, 1) => { n_filled +=1; *islands.last_mut().unwrap()+=1; last = state[i];},
[INFO] [stdout]     |                                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:133:26
[INFO] [stdout]     |
[INFO] [stdout] 133 |             (1, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:134:56
[INFO] [stdout]     |
[INFO] [stdout] 134 |             (-1, 1) => { n_filled+=1; islands.push(1); last = state[i]; },
[INFO] [stdout]     |                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:136:27
[INFO] [stdout]     |
[INFO] [stdout] 136 |             (-1, -1) => { last = state[i];},
[INFO] [stdout]     |                           ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solver.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn new(n_filled: usize, islands: Vec<usize>, n_unknown:usize) -> Features {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_state`
[INFO] [stdout]   --> src/solver.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |     ortho_state: Vec<i8>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_features`
[INFO] [stdout]    --> src/solver.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     ortho_features: Features
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_node`
[INFO] [stdout]    --> src/solver.rs:105:4
[INFO] [stdout]     |
[INFO] [stdout] 105 | fn print_node(node: &Node) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `Command { std: "docker" "inspect" "fd3431589e3410cae7360dbb958a11939a528b44a0e88c5881a9c1019d9c920b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd3431589e3410cae7360dbb958a11939a528b44a0e88c5881a9c1019d9c920b", kill_on_drop: false }`
[INFO] [stdout] fd3431589e3410cae7360dbb958a11939a528b44a0e88c5881a9c1019d9c920b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 683c9f4ec5f2fe898d4be29c95c0a6cc04993afc348bed72cdee6131a69a6b7b
[INFO] running `Command { std: "docker" "start" "-a" "683c9f4ec5f2fe898d4be29c95c0a6cc04993afc348bed72cdee6131a69a6b7b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::prelude::*`
[INFO] [stdout]  --> src/problems.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ndarray::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/problems.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec::Vec`
[INFO] [stdout]  --> src/problems.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/problems.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:129:55
[INFO] [stdout]     |
[INFO] [stdout] 129 |             (0, 1) => { n_filled+=1; islands.push(1); last = state[i]},
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:130:26
[INFO] [stdout]     |
[INFO] [stdout] 130 |             (0, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:132:72
[INFO] [stdout]     |
[INFO] [stdout] 132 |             (1, 1) => { n_filled +=1; *islands.last_mut().unwrap()+=1; last = state[i];},
[INFO] [stdout]     |                                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:133:26
[INFO] [stdout]     |
[INFO] [stdout] 133 |             (1, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:134:56
[INFO] [stdout]     |
[INFO] [stdout] 134 |             (-1, 1) => { n_filled+=1; islands.push(1); last = state[i]; },
[INFO] [stdout]     |                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:136:27
[INFO] [stdout]     |
[INFO] [stdout] 136 |             (-1, -1) => { last = state[i];},
[INFO] [stdout]     |                           ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solver.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn new(n_filled: usize, islands: Vec<usize>, n_unknown:usize) -> Features {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_state`
[INFO] [stdout]   --> src/solver.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |     ortho_state: Vec<i8>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_features`
[INFO] [stdout]    --> src/solver.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     ortho_features: Features
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_node`
[INFO] [stdout]    --> src/solver.rs:105:4
[INFO] [stdout]     |
[INFO] [stdout] 105 | fn print_node(node: &Node) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cross_me_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::prelude::*`
[INFO] [stdout]  --> src/problems.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ndarray::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/problems.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec::Vec`
[INFO] [stdout]  --> src/problems.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/problems.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:129:55
[INFO] [stdout]     |
[INFO] [stdout] 129 |             (0, 1) => { n_filled+=1; islands.push(1); last = state[i]},
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:130:26
[INFO] [stdout]     |
[INFO] [stdout] 130 |             (0, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:132:72
[INFO] [stdout]     |
[INFO] [stdout] 132 |             (1, 1) => { n_filled +=1; *islands.last_mut().unwrap()+=1; last = state[i];},
[INFO] [stdout]     |                                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:133:26
[INFO] [stdout]     |
[INFO] [stdout] 133 |             (1, -1) => { last = state[i]; },
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:134:56
[INFO] [stdout]     |
[INFO] [stdout] 134 |             (-1, 1) => { n_filled+=1; islands.push(1); last = state[i]; },
[INFO] [stdout]     |                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last` is never read
[INFO] [stdout]    --> src/solver.rs:136:27
[INFO] [stdout]     |
[INFO] [stdout] 136 |             (-1, -1) => { last = state[i];},
[INFO] [stdout]     |                           ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_state`
[INFO] [stdout]   --> src/solver.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |     ortho_state: Vec<i8>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ortho_features`
[INFO] [stdout]    --> src/solver.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     ortho_features: Features
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_node`
[INFO] [stdout]    --> src/solver.rs:105:4
[INFO] [stdout]     |
[INFO] [stdout] 105 | fn print_node(node: &Node) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 12.94s
[INFO] running `Command { std: "docker" "inspect" "683c9f4ec5f2fe898d4be29c95c0a6cc04993afc348bed72cdee6131a69a6b7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "683c9f4ec5f2fe898d4be29c95c0a6cc04993afc348bed72cdee6131a69a6b7b", kill_on_drop: false }`
[INFO] [stdout] 683c9f4ec5f2fe898d4be29c95c0a6cc04993afc348bed72cdee6131a69a6b7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d2edfa34ab8edb380fe166cb8cee342da8407fd9fe1e892ad7f62a11b1ba71e9
[INFO] running `Command { std: "docker" "start" "-a" "d2edfa34ab8edb380fe166cb8cee342da8407fd9fe1e892ad7f62a11b1ba71e9", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ndarray::prelude::*`
[INFO] [stderr]  --> src/problems.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ndarray::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/problems.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::vec::Vec`
[INFO] [stderr]  --> src/problems.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::vec::Vec;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::VecDeque`
[INFO] [stderr]  --> src/problems.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::VecDeque;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:129:55
[INFO] [stderr]     |
[INFO] [stderr] 129 |             (0, 1) => { n_filled+=1; islands.push(1); last = state[i]},
[INFO] [stderr]     |                                                       ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:130:26
[INFO] [stderr]     |
[INFO] [stderr] 130 |             (0, -1) => { last = state[i]; },
[INFO] [stderr]     |                          ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:132:72
[INFO] [stderr]     |
[INFO] [stderr] 132 |             (1, 1) => { n_filled +=1; *islands.last_mut().unwrap()+=1; last = state[i];},
[INFO] [stderr]     |                                                                        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:133:26
[INFO] [stderr]     |
[INFO] [stderr] 133 |             (1, -1) => { last = state[i]; },
[INFO] [stderr]     |                          ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:134:56
[INFO] [stderr]     |
[INFO] [stderr] 134 |             (-1, 1) => { n_filled+=1; islands.push(1); last = state[i]; },
[INFO] [stderr]     |                                                        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/solver.rs:136:27
[INFO] [stderr]     |
[INFO] [stderr] 136 |             (-1, -1) => { last = state[i];},
[INFO] [stderr]     |                           ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/solver.rs:85:8
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn new(n_filled: usize, islands: Vec<usize>, n_unknown:usize) -> Features {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ortho_state`
[INFO] [stderr]   --> src/solver.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     ortho_state: Vec<i8>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ortho_features`
[INFO] [stderr]    --> src/solver.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     ortho_features: Features
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_node`
[INFO] [stderr]    --> src/solver.rs:105:4
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn print_node(node: &Node) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ortho_state`
[INFO] [stderr]   --> src/solver.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     ortho_state: Vec<i8>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cross_me_solver` (lib) generated 15 warnings
[INFO] [stderr] warning: `cross_me_solver` (lib test) generated 14 warnings (13 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cross_me_solver-76e2039b7e9c09d6)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test solver::tests::test_get_features ... ok
[INFO] [stdout] test solver::tests::test_problem_110001_with_prefilled_board ... ok
[INFO] [stdout] test solver::tests::test_problem_10101 ... ok
[INFO] [stdout] test solver::tests::test_problem_10100_11111 ... ok
[INFO] [stdout] test solver::tests::test_problem_11111 ... ok
[INFO] [stdout] test solver::tests::test_solve_simple_problem ... ok
[INFO] [stdout] test solver::tests::test_solve_simple_6x6_problem ... ok
[INFO] [stdout] test solver::tests::test_solve_medium_problem ... ok
[INFO] [stdout] test solver::tests::test_solve_medium_10x10_problem ... ok
[INFO] [stdout] test solver::tests::test_solve_2_29 ... ok
[INFO] [stdout] test solver::tests::test_solve_4_1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 10.52s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cross_me_solver-6a90b04c880687af)
[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]    Doc-tests cross_me_solver
[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" "d2edfa34ab8edb380fe166cb8cee342da8407fd9fe1e892ad7f62a11b1ba71e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2edfa34ab8edb380fe166cb8cee342da8407fd9fe1e892ad7f62a11b1ba71e9", kill_on_drop: false }`
[INFO] [stdout] d2edfa34ab8edb380fe166cb8cee342da8407fd9fe1e892ad7f62a11b1ba71e9