[INFO] cloning repository https://github.com/bobbynarvy/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bobbynarvy/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobbynarvy%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobbynarvy%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 365fea36fc113bf771ac2a6f16e60c919d14bd20
[INFO] checking bobbynarvy/rustlings against try#7c3a44cf5f95fa5cf164a312bdcf845157af7093 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobbynarvy%2Frustlings" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bobbynarvy/rustlings on toolchain 7c3a44cf5f95fa5cf164a312bdcf845157af7093
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bobbynarvy/rustlings
[INFO] finished tweaking git repo https://github.com/bobbynarvy/rustlings
[INFO] tweaked toml for git repo https://github.com/bobbynarvy/rustlings written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/bobbynarvy/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded notify v4.0.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5e225d23f1eaa07f46cfbe85aac0832e438d52c5fe24a74831863747f79271b
[INFO] running `Command { std: "docker" "start" "-a" "d5e225d23f1eaa07f46cfbe85aac0832e438d52c5fe24a74831863747f79271b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5e225d23f1eaa07f46cfbe85aac0832e438d52c5fe24a74831863747f79271b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5e225d23f1eaa07f46cfbe85aac0832e438d52c5fe24a74831863747f79271b", kill_on_drop: false }`
[INFO] [stdout] d5e225d23f1eaa07f46cfbe85aac0832e438d52c5fe24a74831863747f79271b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 064bd331e0ac9c524183f46626835c8d966ea8fd0777b87f91c72580fbdf8d60
[INFO] running `Command { std: "docker" "start" "-a" "064bd331e0ac9c524183f46626835c8d966ea8fd0777b87f91c72580fbdf8d60", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.75s
[INFO] running `Command { std: "docker" "inspect" "064bd331e0ac9c524183f46626835c8d966ea8fd0777b87f91c72580fbdf8d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064bd331e0ac9c524183f46626835c8d966ea8fd0777b87f91c72580fbdf8d60", kill_on_drop: false }`
[INFO] [stdout] 064bd331e0ac9c524183f46626835c8d966ea8fd0777b87f91c72580fbdf8d60