[INFO] cloning repository https://github.com/roebuk/rust-book-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roebuk/rust-book-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froebuk%2Frust-book-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froebuk%2Frust-book-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed1ca0fec4682bf21af0cd74ff5b4d6b31a544b8
[INFO] testing roebuk/rust-book-exercises 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%2Froebuk%2Frust-book-exercises" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roebuk/rust-book-exercises 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/roebuk/rust-book-exercises
[INFO] finished tweaking git repo https://github.com/roebuk/rust-book-exercises
[INFO] tweaked toml for git repo https://github.com/roebuk/rust-book-exercises written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/roebuk/rust-book-exercises 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-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 866f5ab3b883e2e3275d47d2ec30306def86b3d91cb6ef0215230b3ed69d5ad9
[INFO] running `Command { std: "docker" "start" "-a" "866f5ab3b883e2e3275d47d2ec30306def86b3d91cb6ef0215230b3ed69d5ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "866f5ab3b883e2e3275d47d2ec30306def86b3d91cb6ef0215230b3ed69d5ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "866f5ab3b883e2e3275d47d2ec30306def86b3d91cb6ef0215230b3ed69d5ad9", kill_on_drop: false }`
[INFO] [stdout] 866f5ab3b883e2e3275d47d2ec30306def86b3d91cb6ef0215230b3ed69d5ad9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 0aeddbf21c699b63bc033b55a9f5c5fe9ad6b1e6d2ad9317344989370b354503
[INFO] running `Command { std: "docker" "start" "-a" "0aeddbf21c699b63bc033b55a9f5c5fe9ad6b1e6d2ad9317344989370b354503", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustbook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "0aeddbf21c699b63bc033b55a9f5c5fe9ad6b1e6d2ad9317344989370b354503", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aeddbf21c699b63bc033b55a9f5c5fe9ad6b1e6d2ad9317344989370b354503", kill_on_drop: false }`
[INFO] [stdout] 0aeddbf21c699b63bc033b55a9f5c5fe9ad6b1e6d2ad9317344989370b354503
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] c02bdf79e9484ca60a09cae30f5385c26087d76c9c9ba2e7c9c1f3946c57b8f0
[INFO] running `Command { std: "docker" "start" "-a" "c02bdf79e9484ca60a09cae30f5385c26087d76c9c9ba2e7c9c1f3946c57b8f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustbook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "c02bdf79e9484ca60a09cae30f5385c26087d76c9c9ba2e7c9c1f3946c57b8f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c02bdf79e9484ca60a09cae30f5385c26087d76c9c9ba2e7c9c1f3946c57b8f0", kill_on_drop: false }`
[INFO] [stdout] c02bdf79e9484ca60a09cae30f5385c26087d76c9c9ba2e7c9c1f3946c57b8f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 0f80079b4f4cc71031748744fdbf1e53041d99efe5b45fac7236ac2ffc34f37e
[INFO] running `Command { std: "docker" "start" "-a" "0f80079b4f4cc71031748744fdbf1e53041d99efe5b45fac7236ac2ffc34f37e", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustbook-bcbc803eab72dcdf)
[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" "0f80079b4f4cc71031748744fdbf1e53041d99efe5b45fac7236ac2ffc34f37e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f80079b4f4cc71031748744fdbf1e53041d99efe5b45fac7236ac2ffc34f37e", kill_on_drop: false }`
[INFO] [stdout] 0f80079b4f4cc71031748744fdbf1e53041d99efe5b45fac7236ac2ffc34f37e