[INFO] cloning repository https://github.com/queuedq/exact-cover-rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/queuedq/exact-cover-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4243e392d16ba44917ad6ffb5c3f6b1bafbd4774 [INFO] testing queuedq/exact-cover-rs against 1.55.0 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/queuedq/exact-cover-rs on toolchain 1.55.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/queuedq/exact-cover-rs [INFO] finished tweaking git repo https://github.com/queuedq/exact-cover-rs [INFO] tweaked toml for git repo https://github.com/queuedq/exact-cover-rs written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/queuedq/exact-cover-rs already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 60b789728ff59201edd040c38f296f8d79edab53ee141e747f5a9bf63e8e3faf [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" "60b789728ff59201edd040c38f296f8d79edab53ee141e747f5a9bf63e8e3faf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "60b789728ff59201edd040c38f296f8d79edab53ee141e747f5a9bf63e8e3faf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "60b789728ff59201edd040c38f296f8d79edab53ee141e747f5a9bf63e8e3faf", kill_on_drop: false }` [INFO] [stdout] 60b789728ff59201edd040c38f296f8d79edab53ee141e747f5a9bf63e8e3faf [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", 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] 455cbc199723cb736b2444dd7bbe1aeff9936754db5c2eb6e62190dd63199a39 [INFO] running `Command { std: "docker" "start" "-a" "455cbc199723cb736b2444dd7bbe1aeff9936754db5c2eb6e62190dd63199a39", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.67 [INFO] [stderr] Compiling futures-core v0.3.13 [INFO] [stderr] Compiling futures-sink v0.3.13 [INFO] [stderr] Compiling futures-channel v0.3.13 [INFO] [stderr] Compiling futures-macro v0.3.13 [INFO] [stderr] Compiling futures-util v0.3.13 [INFO] [stderr] Compiling futures-executor v0.3.13 [INFO] [stderr] Compiling futures v0.3.13 [INFO] [stderr] Compiling exact-cover v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variant is never constructed: `Aborted` [INFO] [stdout] --> src/solver.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | Aborted(Matrix), [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `problem` [INFO] [stdout] --> src/solver.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 35 | problem: Problem, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `thread` [INFO] [stdout] --> src/solver.rs:119:5 [INFO] [stdout] | [INFO] [stdout] 119 | thread: JoinHandle<()>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `try_recv` [INFO] [stdout] --> src/solver.rs:179:12 [INFO] [stdout] | [INFO] [stdout] 179 | pub fn try_recv(&self) -> Result { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `join` [INFO] [stdout] --> src/solver.rs:187:12 [INFO] [stdout] | [INFO] [stdout] 187 | pub fn join(self) -> ThreadResult<()> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 28.51s [INFO] running `Command { std: "docker" "inspect" "455cbc199723cb736b2444dd7bbe1aeff9936754db5c2eb6e62190dd63199a39", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "455cbc199723cb736b2444dd7bbe1aeff9936754db5c2eb6e62190dd63199a39", kill_on_drop: false }` [INFO] [stdout] 455cbc199723cb736b2444dd7bbe1aeff9936754db5c2eb6e62190dd63199a39 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c9e9c3db57553de50b2b9cd4ea604edbf710c9b8010ba4592bac423effce2a10 [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" "c9e9c3db57553de50b2b9cd4ea604edbf710c9b8010ba4592bac423effce2a10", kill_on_drop: false }` [INFO] [stderr] Compiling exact-cover v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variant is never constructed: `Aborted` [INFO] [stdout] --> src/solver.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | Aborted(Matrix), [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `problem` [INFO] [stdout] --> src/solver.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 35 | problem: Problem, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `thread` [INFO] [stdout] --> src/solver.rs:119:5 [INFO] [stdout] | [INFO] [stdout] 119 | thread: JoinHandle<()>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `try_recv` [INFO] [stdout] --> src/solver.rs:179:12 [INFO] [stdout] | [INFO] [stdout] 179 | pub fn try_recv(&self) -> Result { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `join` [INFO] [stdout] --> src/solver.rs:187:12 [INFO] [stdout] | [INFO] [stdout] 187 | pub fn join(self) -> ThreadResult<()> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> src/dlx.rs:222:9 [INFO] [stdout] | [INFO] [stdout] 222 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Aborted` [INFO] [stdout] --> src/solver.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | Aborted(Matrix), [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `problem` [INFO] [stdout] --> src/solver.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 35 | problem: Problem, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `thread` [INFO] [stdout] --> src/solver.rs:119:5 [INFO] [stdout] | [INFO] [stdout] 119 | thread: JoinHandle<()>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `try_recv` [INFO] [stdout] --> src/solver.rs:179:12 [INFO] [stdout] | [INFO] [stdout] 179 | pub fn try_recv(&self) -> Result { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `join` [INFO] [stdout] --> src/solver.rs:187:12 [INFO] [stdout] | [INFO] [stdout] 187 | pub fn join(self) -> ThreadResult<()> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 4.58s [INFO] running `Command { std: "docker" "inspect" "c9e9c3db57553de50b2b9cd4ea604edbf710c9b8010ba4592bac423effce2a10", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c9e9c3db57553de50b2b9cd4ea604edbf710c9b8010ba4592bac423effce2a10", kill_on_drop: false }` [INFO] [stdout] c9e9c3db57553de50b2b9cd4ea604edbf710c9b8010ba4592bac423effce2a10 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 87f9dac381339923340f70950c529b12d8a4bb2b70636d91615851f4b3def526 [INFO] running `Command { std: "docker" "start" "-a" "87f9dac381339923340f70950c529b12d8a4bb2b70636d91615851f4b3def526", kill_on_drop: false }` [INFO] [stderr] warning: variant is never constructed: `Aborted` [INFO] [stderr] --> src/solver.rs:30:5 [INFO] [stderr] | [INFO] [stderr] 30 | Aborted(Matrix), [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `problem` [INFO] [stderr] --> src/solver.rs:35:5 [INFO] [stderr] | [INFO] [stderr] 35 | problem: Problem, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never read: `thread` [INFO] [stderr] --> src/solver.rs:119:5 [INFO] [stderr] | [INFO] [stderr] 119 | thread: JoinHandle<()>, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `try_recv` [INFO] [stderr] --> src/solver.rs:179:12 [INFO] [stderr] | [INFO] [stderr] 179 | pub fn try_recv(&self) -> Result { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `join` [INFO] [stderr] --> src/solver.rs:187:12 [INFO] [stderr] | [INFO] [stderr] 187 | pub fn join(self) -> ThreadResult<()> { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `super::*` [INFO] [stderr] --> src/dlx.rs:222:9 [INFO] [stderr] | [INFO] [stderr] 222 | use super::*; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `exact-cover` (lib) generated 5 warnings [INFO] [stderr] warning: `exact-cover` (lib test) generated 6 warnings (5 duplicates) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/exact_cover-5394528dcc6a925e) [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stderr] Doc-tests exact-cover [INFO] [stdout] test dlx::tests::matrix_search_should_solve_exact_cover ... ok [INFO] [stdout] test problem::tests::problem_can_be_created ... ok [INFO] [stdout] test solver::tests::solver_can_solve_problem ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [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] running `Command { std: "docker" "inspect" "87f9dac381339923340f70950c529b12d8a4bb2b70636d91615851f4b3def526", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "87f9dac381339923340f70950c529b12d8a4bb2b70636d91615851f4b3def526", kill_on_drop: false }` [INFO] [stdout] 87f9dac381339923340f70950c529b12d8a4bb2b70636d91615851f4b3def526