[INFO] cloning repository https://github.com/dsbarnes/Collections-Exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dsbarnes/Collections-Exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsbarnes%2FCollections-Exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsbarnes%2FCollections-Exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bcfe61d9edbe4c6245d87ac0ed3b7b6d1f0dc6aa
[INFO] testing dsbarnes/Collections-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%2Fdsbarnes%2FCollections-Exercises" "/workspace/builds/worker-92/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-92/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dsbarnes/Collections-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/dsbarnes/Collections-Exercises
[INFO] finished tweaking git repo https://github.com/dsbarnes/Collections-Exercises
[INFO] tweaked toml for git repo https://github.com/dsbarnes/Collections-Exercises written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] crate git repo https://github.com/dsbarnes/Collections-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] [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-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] f5d6a4fd50df066344cd99f8d52230da9fc7e050e4815db5bdde43607f99d5e4
[INFO] running `Command { std: "docker" "start" "-a" "f5d6a4fd50df066344cd99f8d52230da9fc7e050e4815db5bdde43607f99d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5d6a4fd50df066344cd99f8d52230da9fc7e050e4815db5bdde43607f99d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5d6a4fd50df066344cd99f8d52230da9fc7e050e4815db5bdde43607f99d5e4", kill_on_drop: false }`
[INFO] [stdout] f5d6a4fd50df066344cd99f8d52230da9fc7e050e4815db5bdde43607f99d5e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] 899684a783e23219163d68fdf21ec56fe3ee293278fccff6f03a2df279cfa37c
[INFO] running `Command { std: "docker" "start" "-a" "899684a783e23219163d68fdf21ec56fe3ee293278fccff6f03a2df279cfa37c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling collections-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.81s
[INFO] running `Command { std: "docker" "inspect" "899684a783e23219163d68fdf21ec56fe3ee293278fccff6f03a2df279cfa37c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "899684a783e23219163d68fdf21ec56fe3ee293278fccff6f03a2df279cfa37c", kill_on_drop: false }`
[INFO] [stdout] 899684a783e23219163d68fdf21ec56fe3ee293278fccff6f03a2df279cfa37c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] [stdout] 655ec8518e33e59cfabda1053db8c890f982d8f014b1033c13e068c3cddb4188
[INFO] running `Command { std: "docker" "start" "-a" "655ec8518e33e59cfabda1053db8c890f982d8f014b1033c13e068c3cddb4188", kill_on_drop: false }`
[INFO] [stderr]    Compiling collections-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "655ec8518e33e59cfabda1053db8c890f982d8f014b1033c13e068c3cddb4188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "655ec8518e33e59cfabda1053db8c890f982d8f014b1033c13e068c3cddb4188", kill_on_drop: false }`
[INFO] [stdout] 655ec8518e33e59cfabda1053db8c890f982d8f014b1033c13e068c3cddb4188
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] [stdout] 8b6bf7e750b62c943ae9aa2a0f068e90136822ed8e5b2f039858204c4cfabfe5
[INFO] running `Command { std: "docker" "start" "-a" "8b6bf7e750b62c943ae9aa2a0f068e90136822ed8e5b2f039858204c4cfabfe5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/collections_exercises-e69306614a703e4d)
[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" "8b6bf7e750b62c943ae9aa2a0f068e90136822ed8e5b2f039858204c4cfabfe5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b6bf7e750b62c943ae9aa2a0f068e90136822ed8e5b2f039858204c4cfabfe5", kill_on_drop: false }`
[INFO] [stdout] 8b6bf7e750b62c943ae9aa2a0f068e90136822ed8e5b2f039858204c4cfabfe5