[INFO] cloning repository https://github.com/gonegitterdunn/mastering-rust-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gonegitterdunn/mastering-rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgonegitterdunn%2Fmastering-rust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgonegitterdunn%2Fmastering-rust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55d8f78309af236dc08556e0a061ef17e7c6e10f
[INFO] testing gonegitterdunn/mastering-rust-exercises against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgonegitterdunn%2Fmastering-rust-exercises" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gonegitterdunn/mastering-rust-exercises on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gonegitterdunn/mastering-rust-exercises
[INFO] finished tweaking git repo https://github.com/gonegitterdunn/mastering-rust-exercises
[INFO] tweaked toml for git repo https://github.com/gonegitterdunn/mastering-rust-exercises written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gonegitterdunn/mastering-rust-exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e224ee0e46f97ef62b4b52c9507e656cd6813b24406e2780e05d73ca5e135fd3
[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" "e224ee0e46f97ef62b4b52c9507e656cd6813b24406e2780e05d73ca5e135fd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e224ee0e46f97ef62b4b52c9507e656cd6813b24406e2780e05d73ca5e135fd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e224ee0e46f97ef62b4b52c9507e656cd6813b24406e2780e05d73ca5e135fd3", kill_on_drop: false }`
[INFO] [stdout] e224ee0e46f97ef62b4b52c9507e656cd6813b24406e2780e05d73ca5e135fd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6db82c6a6e45a0aaf65ddd78c910582847df45e065dec634c89d25800ff370b
[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" "e6db82c6a6e45a0aaf65ddd78c910582847df45e065dec634c89d25800ff370b", kill_on_drop: false }`
[INFO] [stderr]    Compiling mastering_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `Command { std: "docker" "inspect" "e6db82c6a6e45a0aaf65ddd78c910582847df45e065dec634c89d25800ff370b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6db82c6a6e45a0aaf65ddd78c910582847df45e065dec634c89d25800ff370b", kill_on_drop: false }`
[INFO] [stdout] e6db82c6a6e45a0aaf65ddd78c910582847df45e065dec634c89d25800ff370b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--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] 4103f1cd5493b9c33086b2e07f0f4c6a86869ff706fd8fba50d16511b5ac8207
[INFO] running `Command { std: "docker" "start" "-a" "4103f1cd5493b9c33086b2e07f0f4c6a86869ff706fd8fba50d16511b5ac8207", kill_on_drop: false }`
[INFO] [stderr]    Compiling mastering_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "4103f1cd5493b9c33086b2e07f0f4c6a86869ff706fd8fba50d16511b5ac8207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4103f1cd5493b9c33086b2e07f0f4c6a86869ff706fd8fba50d16511b5ac8207", kill_on_drop: false }`
[INFO] [stdout] 4103f1cd5493b9c33086b2e07f0f4c6a86869ff706fd8fba50d16511b5ac8207
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "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] 6fdd5754328cc1ab5ddb6b3fad08e81d674ebbccaf23a06d305cdd339ba7b094
[INFO] running `Command { std: "docker" "start" "-a" "6fdd5754328cc1ab5ddb6b3fad08e81d674ebbccaf23a06d305cdd339ba7b094", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mastering_rust-a8ba0ecbb2a34a74)
[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" "6fdd5754328cc1ab5ddb6b3fad08e81d674ebbccaf23a06d305cdd339ba7b094", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fdd5754328cc1ab5ddb6b3fad08e81d674ebbccaf23a06d305cdd339ba7b094", kill_on_drop: false }`
[INFO] [stdout] 6fdd5754328cc1ab5ddb6b3fad08e81d674ebbccaf23a06d305cdd339ba7b094