[INFO] cloning repository https://github.com/TomSpencerLondon/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/TomSpencerLondon/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTomSpencerLondon%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTomSpencerLondon%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1e7796afbbf35316b935c6e88563569579f3c5ac
[INFO] testing TomSpencerLondon/rust-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%2FTomSpencerLondon%2Frust-exercises" "/workspace/builds/worker-87/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-87/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TomSpencerLondon/rust-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/TomSpencerLondon/rust-exercises
[INFO] finished tweaking git repo https://github.com/TomSpencerLondon/rust-exercises
[INFO] tweaked toml for git repo https://github.com/TomSpencerLondon/rust-exercises written to /workspace/builds/worker-87/source/Cargo.toml
[INFO] crate git repo https://github.com/TomSpencerLondon/rust-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-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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] e00fa00d24c1b233906b3bc7d11a6da2612b3ed73a7bd3d2d8409d89cc633bf2
[INFO] running `Command { std: "docker" "start" "-a" "e00fa00d24c1b233906b3bc7d11a6da2612b3ed73a7bd3d2d8409d89cc633bf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e00fa00d24c1b233906b3bc7d11a6da2612b3ed73a7bd3d2d8409d89cc633bf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e00fa00d24c1b233906b3bc7d11a6da2612b3ed73a7bd3d2d8409d89cc633bf2", kill_on_drop: false }`
[INFO] [stdout] e00fa00d24c1b233906b3bc7d11a6da2612b3ed73a7bd3d2d8409d89cc633bf2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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] c87e94274a6bab6581d8111e80ccf2c61ffa6e6c1e8ed6ca4cb066d8e8641d02
[INFO] running `Command { std: "docker" "start" "-a" "c87e94274a6bab6581d8111e80ccf2c61ffa6e6c1e8ed6ca4cb066d8e8641d02", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "c87e94274a6bab6581d8111e80ccf2c61ffa6e6c1e8ed6ca4cb066d8e8641d02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c87e94274a6bab6581d8111e80ccf2c61ffa6e6c1e8ed6ca4cb066d8e8641d02", kill_on_drop: false }`
[INFO] [stdout] c87e94274a6bab6581d8111e80ccf2c61ffa6e6c1e8ed6ca4cb066d8e8641d02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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] e7059c8aab05fef932fe916dc872d79e3a30b2d07b56e5bfadc90690def629b3
[INFO] running `Command { std: "docker" "start" "-a" "e7059c8aab05fef932fe916dc872d79e3a30b2d07b56e5bfadc90690def629b3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.00s
[INFO] running `Command { std: "docker" "inspect" "e7059c8aab05fef932fe916dc872d79e3a30b2d07b56e5bfadc90690def629b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7059c8aab05fef932fe916dc872d79e3a30b2d07b56e5bfadc90690def629b3", kill_on_drop: false }`
[INFO] [stdout] e7059c8aab05fef932fe916dc872d79e3a30b2d07b56e5bfadc90690def629b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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] 105e06cfa6688b18391f45332b8eb636007038c8516104bf12163cd3d6e98b08
[INFO] running `Command { std: "docker" "start" "-a" "105e06cfa6688b18391f45332b8eb636007038c8516104bf12163cd3d6e98b08", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.63s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_exercises-e88b9ea8e58bfe9a)
[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" "105e06cfa6688b18391f45332b8eb636007038c8516104bf12163cd3d6e98b08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "105e06cfa6688b18391f45332b8eb636007038c8516104bf12163cd3d6e98b08", kill_on_drop: false }`
[INFO] [stdout] 105e06cfa6688b18391f45332b8eb636007038c8516104bf12163cd3d6e98b08