[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 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisccerami%2Frust-blackjack" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chrisccerami/rust-blackjack on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-28/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" "+1.60.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a6ebc57c9d56490db0256694a4cf106a811dd0c8dcb4d2649c77c1f865250ee
[INFO] running `Command { std: "docker" "start" "-a" "8a6ebc57c9d56490db0256694a4cf106a811dd0c8dcb4d2649c77c1f865250ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a6ebc57c9d56490db0256694a4cf106a811dd0c8dcb4d2649c77c1f865250ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a6ebc57c9d56490db0256694a4cf106a811dd0c8dcb4d2649c77c1f865250ee", kill_on_drop: false }`
[INFO] [stdout] 8a6ebc57c9d56490db0256694a4cf106a811dd0c8dcb4d2649c77c1f865250ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00652b8d6648e9d30274e3dc8880d1a94b8cd5ea420351488728f4547c01ee78
[INFO] running `Command { std: "docker" "start" "-a" "00652b8d6648e9d30274e3dc8880d1a94b8cd5ea420351488728f4547c01ee78", kill_on_drop: false }`
[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 13.90s
[INFO] running `Command { std: "docker" "inspect" "00652b8d6648e9d30274e3dc8880d1a94b8cd5ea420351488728f4547c01ee78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00652b8d6648e9d30274e3dc8880d1a94b8cd5ea420351488728f4547c01ee78", kill_on_drop: false }`
[INFO] [stdout] 00652b8d6648e9d30274e3dc8880d1a94b8cd5ea420351488728f4547c01ee78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05978b47fcbf9c3e2341deec99458024368c70bcbc845be9b2cdd44c5ba37037
[INFO] running `Command { std: "docker" "start" "-a" "05978b47fcbf9c3e2341deec99458024368c70bcbc845be9b2cdd44c5ba37037", 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 51.05s
[INFO] running `Command { std: "docker" "inspect" "05978b47fcbf9c3e2341deec99458024368c70bcbc845be9b2cdd44c5ba37037", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05978b47fcbf9c3e2341deec99458024368c70bcbc845be9b2cdd44c5ba37037", kill_on_drop: false }`
[INFO] [stdout] 05978b47fcbf9c3e2341deec99458024368c70bcbc845be9b2cdd44c5ba37037
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 677850bfdfc70f4876fd6ce7344191b372c914fd178f95900eb009f484ab11e5
[INFO] running `Command { std: "docker" "start" "-a" "677850bfdfc70f4876fd6ce7344191b372c914fd178f95900eb009f484ab11e5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] 
[INFO] [stderr]   --> src/blackjack/game.rs:12:9
[INFO] [stdout] running 7 tests
[INFO] [stderr]    |
[INFO] [stdout] test blackjack::card::test_name ... ok
[INFO] [stderr] 12 |         &self.deck.shuffle();
[INFO] [stdout] test blackjack::card::test_score_for_face_card ... ok
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout] test blackjack::card::test_score_for_numbers ... ok
[INFO] [stderr]    |
[INFO] [stdout] test blackjack::player::test_score ... ok
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] test blackjack::deck::test_draw_card ... ok
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout] test blackjack::deck::test_shuffle ... ok
[INFO] [stderr]    |
[INFO] [stdout] test blackjack::game::test_deal ... ok
[INFO] [stderr] 12 |         let _ = &self.deck.shuffle();
[INFO] [stdout] 
[INFO] [stderr]    |         +++++++
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: `blackjack` (bin "blackjack" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.28s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/blackjack-65cfda9c58840be4)
[INFO] running `Command { std: "docker" "inspect" "677850bfdfc70f4876fd6ce7344191b372c914fd178f95900eb009f484ab11e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "677850bfdfc70f4876fd6ce7344191b372c914fd178f95900eb009f484ab11e5", kill_on_drop: false }`
[INFO] [stdout] 677850bfdfc70f4876fd6ce7344191b372c914fd178f95900eb009f484ab11e5