[INFO] cloning repository https://github.com/pione30/rust-the-book-ch08-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pione30/rust-the-book-ch08-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpione30%2Frust-the-book-ch08-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpione30%2Frust-the-book-ch08-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ea329af6436b66673e1326a72e9d3a6f6a95624
[INFO] testing pione30/rust-the-book-ch08-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%2Fpione30%2Frust-the-book-ch08-exercises" "/workspace/builds/worker-32/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-32/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pione30/rust-the-book-ch08-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/pione30/rust-the-book-ch08-exercises
[INFO] finished tweaking git repo https://github.com/pione30/rust-the-book-ch08-exercises
[INFO] tweaked toml for git repo https://github.com/pione30/rust-the-book-ch08-exercises written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] crate git repo https://github.com/pione30/rust-the-book-ch08-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] 19cd240d940b7be3b9ffe42d386d6474543a8cb61c55e1b059dc8f8d54850bc8
[INFO] running `Command { std: "docker" "start" "-a" "19cd240d940b7be3b9ffe42d386d6474543a8cb61c55e1b059dc8f8d54850bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19cd240d940b7be3b9ffe42d386d6474543a8cb61c55e1b059dc8f8d54850bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19cd240d940b7be3b9ffe42d386d6474543a8cb61c55e1b059dc8f8d54850bc8", kill_on_drop: false }`
[INFO] [stdout] 19cd240d940b7be3b9ffe42d386d6474543a8cb61c55e1b059dc8f8d54850bc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] 79c6e0c36b6b80db6a67035b3bc7691871dde8f3bf93eeb4b0dd2703f5cfefa2
[INFO] running `Command { std: "docker" "start" "-a" "79c6e0c36b6b80db6a67035b3bc7691871dde8f3bf93eeb4b0dd2703f5cfefa2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-the-book-ch08-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "79c6e0c36b6b80db6a67035b3bc7691871dde8f3bf93eeb4b0dd2703f5cfefa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79c6e0c36b6b80db6a67035b3bc7691871dde8f3bf93eeb4b0dd2703f5cfefa2", kill_on_drop: false }`
[INFO] [stdout] 79c6e0c36b6b80db6a67035b3bc7691871dde8f3bf93eeb4b0dd2703f5cfefa2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] 2b6a452dfb070f3e97eb771b2a6b6ba413888ccf024d7d0d313176200dcc5401
[INFO] running `Command { std: "docker" "start" "-a" "2b6a452dfb070f3e97eb771b2a6b6ba413888ccf024d7d0d313176200dcc5401", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-the-book-ch08-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.18s
[INFO] running `Command { std: "docker" "inspect" "2b6a452dfb070f3e97eb771b2a6b6ba413888ccf024d7d0d313176200dcc5401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b6a452dfb070f3e97eb771b2a6b6ba413888ccf024d7d0d313176200dcc5401", kill_on_drop: false }`
[INFO] [stdout] 2b6a452dfb070f3e97eb771b2a6b6ba413888ccf024d7d0d313176200dcc5401
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] b7765f8e6442d9c820d62ca0cfd7235fd20090f16854eee12581a9d2192975b8
[INFO] running `Command { std: "docker" "start" "-a" "b7765f8e6442d9c820d62ca0cfd7235fd20090f16854eee12581a9d2192975b8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.87s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_the_book_ch08_exercises-1aca5d9bd969732d)
[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" "b7765f8e6442d9c820d62ca0cfd7235fd20090f16854eee12581a9d2192975b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7765f8e6442d9c820d62ca0cfd7235fd20090f16854eee12581a9d2192975b8", kill_on_drop: false }`
[INFO] [stdout] b7765f8e6442d9c820d62ca0cfd7235fd20090f16854eee12581a9d2192975b8