[INFO] fetching crate circular 0.3.0...
[INFO] checking circular-0.3.0 against try#5d9095c550fcec9e458ce8d6b0c04a217641db66 for pr-77153
[INFO] extracting crate circular 0.3.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate circular 0.3.0 on toolchain 5d9095c550fcec9e458ce8d6b0c04a217641db66
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate circular 0.3.0
[INFO] finished tweaking crates.io crate circular 0.3.0
[INFO] tweaked toml for crates.io crate circular 0.3.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 60c17f6ef2311eb1cf8596b1e605672af0e2f0cb1eb94b1decf99863a641ffe8
[INFO] running `Command { std: "docker" "start" "-a" "60c17f6ef2311eb1cf8596b1e605672af0e2f0cb1eb94b1decf99863a641ffe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60c17f6ef2311eb1cf8596b1e605672af0e2f0cb1eb94b1decf99863a641ffe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60c17f6ef2311eb1cf8596b1e605672af0e2f0cb1eb94b1decf99863a641ffe8", kill_on_drop: false }`
[INFO] [stdout] 60c17f6ef2311eb1cf8596b1e605672af0e2f0cb1eb94b1decf99863a641ffe8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8219f75ca6511d55bf6dbe87bc5c8c67bd5043b846c598e1aeccfcf425fc3d72
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8219f75ca6511d55bf6dbe87bc5c8c67bd5043b846c598e1aeccfcf425fc3d72", kill_on_drop: false }`
[INFO] [stderr]     Checking circular v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]    --> src/lib.rs:397:7
[INFO] [stdout]     |
[INFO] [stdout] 397 |   use std::str;
[INFO] [stdout]     |       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "8219f75ca6511d55bf6dbe87bc5c8c67bd5043b846c598e1aeccfcf425fc3d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8219f75ca6511d55bf6dbe87bc5c8c67bd5043b846c598e1aeccfcf425fc3d72", kill_on_drop: false }`
[INFO] [stdout] 8219f75ca6511d55bf6dbe87bc5c8c67bd5043b846c598e1aeccfcf425fc3d72