[INFO] fetching crate mailchecker 4.0.3...
[INFO] checking mailchecker-4.0.3 against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] extracting crate mailchecker 4.0.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mailchecker 4.0.3 on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mailchecker 4.0.3
[INFO] finished tweaking crates.io crate mailchecker 4.0.3
[INFO] tweaked toml for crates.io crate mailchecker 4.0.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate mailchecker 4.0.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0dfc1bfc44bdaa97a23478ef2fc554d771d418ad4ff2dfa2dc3fbff6fb5da896
[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" "0dfc1bfc44bdaa97a23478ef2fc554d771d418ad4ff2dfa2dc3fbff6fb5da896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dfc1bfc44bdaa97a23478ef2fc554d771d418ad4ff2dfa2dc3fbff6fb5da896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dfc1bfc44bdaa97a23478ef2fc554d771d418ad4ff2dfa2dc3fbff6fb5da896", kill_on_drop: false }`
[INFO] [stdout] 0dfc1bfc44bdaa97a23478ef2fc554d771d418ad4ff2dfa2dc3fbff6fb5da896
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50241846f0ca1ff058ac0664d0d6ac99ff63e3109a54e2ff90d9a7a9dc7935af
[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" "50241846f0ca1ff058ac0664d0d6ac99ff63e3109a54e2ff90d9a7a9dc7935af", kill_on_drop: false }`
[INFO] [stderr]     Checking pretty_assertions v0.1.2
[INFO] [stderr]     Checking mailchecker v4.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[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 2.40s
[INFO] running `Command { std: "docker" "inspect" "50241846f0ca1ff058ac0664d0d6ac99ff63e3109a54e2ff90d9a7a9dc7935af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50241846f0ca1ff058ac0664d0d6ac99ff63e3109a54e2ff90d9a7a9dc7935af", kill_on_drop: false }`
[INFO] [stdout] 50241846f0ca1ff058ac0664d0d6ac99ff63e3109a54e2ff90d9a7a9dc7935af