[INFO] cloning repository https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sebasmagri/rust-concurrency-patterns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebasmagri%2Frust-concurrency-patterns", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebasmagri%2Frust-concurrency-patterns'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c916fe831faec73a7fb5d652e91fa9da528d85c4
[INFO] testing sebasmagri/rust-concurrency-patterns against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebasmagri%2Frust-concurrency-patterns" "/workspace/builds/worker-81/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-81/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sebasmagri/rust-concurrency-patterns on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] finished tweaking git repo https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] tweaked toml for git repo https://github.com/sebasmagri/rust-concurrency-patterns written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate git repo https://github.com/sebasmagri/rust-concurrency-patterns already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 620cb6c9d3a275d895c39f1a8afc890dff902bbefddcdbb5819ebc8f6b851127
[INFO] running `Command { std: "docker" "start" "-a" "620cb6c9d3a275d895c39f1a8afc890dff902bbefddcdbb5819ebc8f6b851127", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "620cb6c9d3a275d895c39f1a8afc890dff902bbefddcdbb5819ebc8f6b851127", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "620cb6c9d3a275d895c39f1a8afc890dff902bbefddcdbb5819ebc8f6b851127", kill_on_drop: false }`
[INFO] [stdout] 620cb6c9d3a275d895c39f1a8afc890dff902bbefddcdbb5819ebc8f6b851127
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d3173af854d9e71876b4f826b8f2e58489d298e9a4d167f86bef774a8e98ecc
[INFO] running `Command { std: "docker" "start" "-a" "1d3173af854d9e71876b4f826b8f2e58489d298e9a4d167f86bef774a8e98ecc", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "1d3173af854d9e71876b4f826b8f2e58489d298e9a4d167f86bef774a8e98ecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d3173af854d9e71876b4f826b8f2e58489d298e9a4d167f86bef774a8e98ecc", kill_on_drop: false }`
[INFO] [stdout] 1d3173af854d9e71876b4f826b8f2e58489d298e9a4d167f86bef774a8e98ecc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55a63fe1af4ff2e2f40e4925195088fa76e784e645b4f2add0d093f67d76010d
[INFO] running `Command { std: "docker" "start" "-a" "55a63fe1af4ff2e2f40e4925195088fa76e784e645b4f2add0d093f67d76010d", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/04-fan-in.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     consumer(Arc::new(Mutex::new(rx))).join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 13.65s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/concurrency_patterns-2beb3fbcc53d046d)
[INFO] running `Command { std: "docker" "inspect" "55a63fe1af4ff2e2f40e4925195088fa76e784e645b4f2add0d093f67d76010d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55a63fe1af4ff2e2f40e4925195088fa76e784e645b4f2add0d093f67d76010d", kill_on_drop: false }`
[INFO] [stdout] 55a63fe1af4ff2e2f40e4925195088fa76e784e645b4f2add0d093f67d76010d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 01aaf7bc95dd66f1a42a5763caeda4249d0b1b04157613d8aae32997f0a69a09
[INFO] running `Command { std: "docker" "start" "-a" "01aaf7bc95dd66f1a42a5763caeda4249d0b1b04157613d8aae32997f0a69a09", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> examples/04-fan-in.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     consumer(Arc::new(Mutex::new(rx))).join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `concurrency-patterns` (example "04-fan-in") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.74s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/concurrency_patterns-2beb3fbcc53d046d)
[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" "01aaf7bc95dd66f1a42a5763caeda4249d0b1b04157613d8aae32997f0a69a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01aaf7bc95dd66f1a42a5763caeda4249d0b1b04157613d8aae32997f0a69a09", kill_on_drop: false }`
[INFO] [stdout] 01aaf7bc95dd66f1a42a5763caeda4249d0b1b04157613d8aae32997f0a69a09