[INFO] cloning repository https://github.com/chrisccerami/rust-blackjack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chrisccerami/rust-blackjack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisccerami%2Frust-blackjack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisccerami%2Frust-blackjack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 015684c343950c31f5363c6cff47c32db608dbbf
[INFO] testing chrisccerami/rust-blackjack against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisccerami%2Frust-blackjack" "/workspace/builds/worker-101/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-101/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chrisccerami/rust-blackjack on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chrisccerami/rust-blackjack
[INFO] finished tweaking git repo https://github.com/chrisccerami/rust-blackjack
[INFO] tweaked toml for git repo https://github.com/chrisccerami/rust-blackjack written to /workspace/builds/worker-101/source/Cargo.toml
[INFO] crate git repo https://github.com/chrisccerami/rust-blackjack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 232336eb221fa8a10d07028835012e7e53e4f0007c2db7127eb983d8ffd27fc9
[INFO] running `Command { std: "docker" "start" "-a" "232336eb221fa8a10d07028835012e7e53e4f0007c2db7127eb983d8ffd27fc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "232336eb221fa8a10d07028835012e7e53e4f0007c2db7127eb983d8ffd27fc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "232336eb221fa8a10d07028835012e7e53e4f0007c2db7127eb983d8ffd27fc9", kill_on_drop: false }`
[INFO] [stdout] 232336eb221fa8a10d07028835012e7e53e4f0007c2db7127eb983d8ffd27fc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff6026659560517d2889fc9fd63db4a8ea606b0bbadb03cbb303156b7bcac03d
[INFO] running `Command { std: "docker" "start" "-a" "ff6026659560517d2889fc9fd63db4a8ea606b0bbadb03cbb303156b7bcac03d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.5
[INFO] [stderr]    Compiling libc v0.2.5
[INFO] [stderr]    Compiling advapi32-sys v0.1.2
[INFO] [stderr]    Compiling rand v0.3.13
[INFO] [stderr]    Compiling blackjack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/blackjack/game.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         &self.deck.shuffle();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = &self.deck.shuffle();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.03s
[INFO] running `Command { std: "docker" "inspect" "ff6026659560517d2889fc9fd63db4a8ea606b0bbadb03cbb303156b7bcac03d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff6026659560517d2889fc9fd63db4a8ea606b0bbadb03cbb303156b7bcac03d", kill_on_drop: false }`
[INFO] [stdout] ff6026659560517d2889fc9fd63db4a8ea606b0bbadb03cbb303156b7bcac03d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab2a6897fdeb41d8d4e7f5d6a79b10b46da989a009c6f1833fc4bf5a1287a0f1
[INFO] running `Command { std: "docker" "start" "-a" "ab2a6897fdeb41d8d4e7f5d6a79b10b46da989a009c6f1833fc4bf5a1287a0f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling blackjack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/blackjack/game.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         &self.deck.shuffle();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = &self.deck.shuffle();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "ab2a6897fdeb41d8d4e7f5d6a79b10b46da989a009c6f1833fc4bf5a1287a0f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab2a6897fdeb41d8d4e7f5d6a79b10b46da989a009c6f1833fc4bf5a1287a0f1", kill_on_drop: false }`
[INFO] [stdout] ab2a6897fdeb41d8d4e7f5d6a79b10b46da989a009c6f1833fc4bf5a1287a0f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 76eb92986c34acc55482a90d7f7309d9471d5822b2dd0af0ae325fecd5bc43ed
[INFO] running `Command { std: "docker" "start" "-a" "76eb92986c34acc55482a90d7f7309d9471d5822b2dd0af0ae325fecd5bc43ed", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/blackjack/game.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         &self.deck.shuffle();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let _ = &self.deck.shuffle();
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `blackjack` (bin "blackjack" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/blackjack-f2a10956873f0063)
[INFO] [stdout] running 7 tests
[INFO] [stdout] test blackjack::deck::test_draw_card ... ok
[INFO] [stdout] test blackjack::card::test_score_for_numbers ... ok
[INFO] [stdout] test blackjack::card::test_name ... ok
[INFO] [stdout] test blackjack::card::test_score_for_face_card ... ok
[INFO] [stdout] test blackjack::game::test_deal ... ok
[INFO] [stdout] test blackjack::deck::test_shuffle ... ok
[INFO] [stdout] test blackjack::player::test_score ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "76eb92986c34acc55482a90d7f7309d9471d5822b2dd0af0ae325fecd5bc43ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76eb92986c34acc55482a90d7f7309d9471d5822b2dd0af0ae325fecd5bc43ed", kill_on_drop: false }`
[INFO] [stdout] 76eb92986c34acc55482a90d7f7309d9471d5822b2dd0af0ae325fecd5bc43ed