[INFO] fetching crate lights-out 0.1.0...
[INFO] testing lights-out-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate lights-out 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate lights-out 0.1.0
[INFO] finished tweaking crates.io crate lights-out 0.1.0
[INFO] tweaked toml for crates.io crate lights-out 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lights-out 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 974de43441d261ea93aafbe7cb8a648dcd548681e7d011234fcd88015e33db6f
[INFO] running `Command { std: "docker" "start" "-a" "974de43441d261ea93aafbe7cb8a648dcd548681e7d011234fcd88015e33db6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "974de43441d261ea93aafbe7cb8a648dcd548681e7d011234fcd88015e33db6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "974de43441d261ea93aafbe7cb8a648dcd548681e7d011234fcd88015e33db6f", kill_on_drop: false }`
[INFO] [stdout] 974de43441d261ea93aafbe7cb8a648dcd548681e7d011234fcd88015e33db6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2be016e59634ba030da3f022ac668ca06ddb09e175211ced6f51c27e34660c63
[INFO] running `Command { std: "docker" "start" "-a" "2be016e59634ba030da3f022ac668ca06ddb09e175211ced6f51c27e34660c63", kill_on_drop: false }`
[INFO] [stderr]    Compiling lights-out v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Level` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructLevel` is never constructed
[INFO] [stdout]   --> src/solvers/state2.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct StructLevel {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl StructLevel {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gauss_jordan_zf2` is never used
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "2be016e59634ba030da3f022ac668ca06ddb09e175211ced6f51c27e34660c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be016e59634ba030da3f022ac668ca06ddb09e175211ced6f51c27e34660c63", kill_on_drop: false }`
[INFO] [stdout] 2be016e59634ba030da3f022ac668ca06ddb09e175211ced6f51c27e34660c63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86a3f350f0009de586ce0703f0c47d08bc4418b9e003adbfced905b6c6c4ae88
[INFO] running `Command { std: "docker" "start" "-a" "86a3f350f0009de586ce0703f0c47d08bc4418b9e003adbfced905b6c6c4ae88", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Level` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructLevel` is never constructed
[INFO] [stdout]   --> src/solvers/state2.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct StructLevel {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl StructLevel {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gauss_jordan_zf2` is never used
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lights-out v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] 2 |     fn size(&self) -> (usize, usize);
[INFO] [stdout] 3 |     fn is_solved(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "86a3f350f0009de586ce0703f0c47d08bc4418b9e003adbfced905b6c6c4ae88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86a3f350f0009de586ce0703f0c47d08bc4418b9e003adbfced905b6c6c4ae88", kill_on_drop: false }`
[INFO] [stdout] 86a3f350f0009de586ce0703f0c47d08bc4418b9e003adbfced905b6c6c4ae88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a0c43fe35657c726c82d4c5b2b57d12da63b059490af0e6ad23cffb66630e207
[INFO] running `Command { std: "docker" "start" "-a" "a0c43fe35657c726c82d4c5b2b57d12da63b059490af0e6ad23cffb66630e207", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/solvers/state2.rs:150:6
[INFO] [stderr]     |
[INFO] [stderr] 150 |     };
[INFO] [stderr]     |      ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/solvers/state2.rs:162:6
[INFO] [stderr]     |
[INFO] [stderr] 162 |     };
[INFO] [stderr]     |      ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Level` is never used
[INFO] [stderr]  --> src/solvers/state2.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait Level {
[INFO] [stderr]   |           ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StructLevel` is never constructed
[INFO] [stderr]   --> src/solvers/state2.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct StructLevel {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/solvers/state2.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl StructLevel {
[INFO] [stderr]    | ---------------- associated function in this implementation
[INFO] [stderr] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `solve` is never used
[INFO] [stderr]   --> src/solvers/state2.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `gauss_jordan_zf2` is never used
[INFO] [stderr]    --> src/solvers/state2.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `lights-out` (lib) generated 7 warnings
[INFO] [stderr] warning: method `is_solved` is never used
[INFO] [stderr]  --> src/solvers/state2.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait Level {
[INFO] [stderr]   |           ----- method in this trait
[INFO] [stderr] 2 |     fn size(&self) -> (usize, usize);
[INFO] [stderr] 3 |     fn is_solved(&self) -> bool;
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `lights-out` (lib test) generated 3 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lights_out-f9e044024008d023)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lights_out
[INFO] [stdout] running 1 test
[INFO] [stdout] test solvers::state2::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/solvers/state2.rs:150:6
[INFO] [stderr]     |
[INFO] [stderr] 150 |     };
[INFO] [stderr]     |      ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/solvers/state2.rs:162:6
[INFO] [stderr]     |
[INFO] [stderr] 162 |     };
[INFO] [stderr]     |      ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: 2 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" "a0c43fe35657c726c82d4c5b2b57d12da63b059490af0e6ad23cffb66630e207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0c43fe35657c726c82d4c5b2b57d12da63b059490af0e6ad23cffb66630e207", kill_on_drop: false }`
[INFO] [stdout] a0c43fe35657c726c82d4c5b2b57d12da63b059490af0e6ad23cffb66630e207