[INFO] cloning repository https://github.com/steinsag/rust-connect4 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steinsag/rust-connect4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteinsag%2Frust-connect4", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteinsag%2Frust-connect4'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d9d3f098247097ab3f65e5006b1196bb331e82e7 [INFO] testing steinsag/rust-connect4 against 1.55.0 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteinsag%2Frust-connect4" "/workspace/builds/worker-66/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-66/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/steinsag/rust-connect4 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/steinsag/rust-connect4 [INFO] finished tweaking git repo https://github.com/steinsag/rust-connect4 [INFO] tweaked toml for git repo https://github.com/steinsag/rust-connect4 written to /workspace/builds/worker-66/source/Cargo.toml [INFO] crate git repo https://github.com/steinsag/rust-connect4 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-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] 117d5ef5433888579c428e604dcc1a9b962b55ddd0a49b0af4170bf7cb5b2cff [INFO] running `Command { std: "docker" "start" "-a" "117d5ef5433888579c428e604dcc1a9b962b55ddd0a49b0af4170bf7cb5b2cff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "117d5ef5433888579c428e604dcc1a9b962b55ddd0a49b0af4170bf7cb5b2cff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "117d5ef5433888579c428e604dcc1a9b962b55ddd0a49b0af4170bf7cb5b2cff", kill_on_drop: false }` [INFO] [stdout] 117d5ef5433888579c428e604dcc1a9b962b55ddd0a49b0af4170bf7cb5b2cff [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] [stdout] f9d91ef39535c1071db8025529ce4ff40161479e88200e61fda36c1b72a49f4c [INFO] running `Command { std: "docker" "start" "-a" "f9d91ef39535c1071db8025529ce4ff40161479e88200e61fda36c1b72a49f4c", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling libc v0.2.80 [INFO] [stderr] Compiling getrandom v0.1.15 [INFO] [stderr] Compiling ppv-lite86 v0.2.9 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling connect4 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `temporary_game_field` [INFO] [stdout] --> src/strategy/back_propagation.rs:18:17 [INFO] [stdout] | [INFO] [stdout] 18 | let mut temporary_game_field = board.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temporary_game_field` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `col` [INFO] [stdout] --> src/strategy/back_propagation.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | for col in 0..COLS {} [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_col` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/strategy/back_propagation.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut temporary_game_field = board.clone(); [INFO] [stdout] | ----^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `pushed_columns` [INFO] [stdout] --> src/strategy/back_propagation.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | pushed_columns: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 53.66s [INFO] running `Command { std: "docker" "inspect" "f9d91ef39535c1071db8025529ce4ff40161479e88200e61fda36c1b72a49f4c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f9d91ef39535c1071db8025529ce4ff40161479e88200e61fda36c1b72a49f4c", kill_on_drop: false }` [INFO] [stdout] f9d91ef39535c1071db8025529ce4ff40161479e88200e61fda36c1b72a49f4c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] 8ae8af170ad796b1675e0efb3f651cdfe392c7628ae146b5b2e393bd821608aa [INFO] running `Command { std: "docker" "start" "-a" "8ae8af170ad796b1675e0efb3f651cdfe392c7628ae146b5b2e393bd821608aa", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling connect4 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `temporary_game_field` [INFO] [stdout] --> src/strategy/back_propagation.rs:18:17 [INFO] [stdout] | [INFO] [stdout] 18 | let mut temporary_game_field = board.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temporary_game_field` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `col` [INFO] [stdout] --> src/strategy/back_propagation.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | for col in 0..COLS {} [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_col` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/strategy/back_propagation.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut temporary_game_field = board.clone(); [INFO] [stdout] | ----^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `pushed_columns` [INFO] [stdout] --> src/strategy/back_propagation.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | pushed_columns: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 2.14s [INFO] running `Command { std: "docker" "inspect" "8ae8af170ad796b1675e0efb3f651cdfe392c7628ae146b5b2e393bd821608aa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8ae8af170ad796b1675e0efb3f651cdfe392c7628ae146b5b2e393bd821608aa", kill_on_drop: false }` [INFO] [stdout] 8ae8af170ad796b1675e0efb3f651cdfe392c7628ae146b5b2e393bd821608aa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] [stdout] aedbd4b1bd5f5860aaf70d08770c929b1cd7dca1e3984b0080f1681e53b72f4e [INFO] running `Command { std: "docker" "start" "-a" "aedbd4b1bd5f5860aaf70d08770c929b1cd7dca1e3984b0080f1681e53b72f4e", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] warning: unused variable: `temporary_game_field` [INFO] [stderr] --> src/strategy/back_propagation.rs:18:17 [INFO] [stderr] | [INFO] [stderr] 18 | let mut temporary_game_field = board.clone(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temporary_game_field` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `col` [INFO] [stderr] --> src/strategy/back_propagation.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | for col in 0..COLS {} [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_col` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/strategy/back_propagation.rs:18:13 [INFO] [stderr] | [INFO] [stderr] 18 | let mut temporary_game_field = board.clone(); [INFO] [stderr] | ----^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `pushed_columns` [INFO] [stderr] --> src/strategy/back_propagation.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | pushed_columns: Vec, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `connect4` (bin "connect4" test) generated 4 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.72s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/connect4-bee30b6f4f85e161) [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test board::tests::test_find_lowest_empty_row ... ok [INFO] [stdout] test board::tests::test_from ... ok [INFO] [stdout] test board::tests::test_new ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "aedbd4b1bd5f5860aaf70d08770c929b1cd7dca1e3984b0080f1681e53b72f4e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "aedbd4b1bd5f5860aaf70d08770c929b1cd7dca1e3984b0080f1681e53b72f4e", kill_on_drop: false }` [INFO] [stdout] aedbd4b1bd5f5860aaf70d08770c929b1cd7dca1e3984b0080f1681e53b72f4e