[INFO] fetching crate mailchecker 3.3.12...
[INFO] checking mailchecker-3.3.12 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate mailchecker 3.3.12 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mailchecker 3.3.12 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mailchecker 3.3.12
[INFO] finished tweaking crates.io crate mailchecker 3.3.12
[INFO] tweaked toml for crates.io crate mailchecker 3.3.12 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mailchecker 3.3.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty_assertions v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0ca9349e9ae9d227dde854b812e86e18182dbdf6dce9e6d73a8d3e1f2d7b401
[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" "d0ca9349e9ae9d227dde854b812e86e18182dbdf6dce9e6d73a8d3e1f2d7b401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0ca9349e9ae9d227dde854b812e86e18182dbdf6dce9e6d73a8d3e1f2d7b401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0ca9349e9ae9d227dde854b812e86e18182dbdf6dce9e6d73a8d3e1f2d7b401", kill_on_drop: false }`
[INFO] [stdout] d0ca9349e9ae9d227dde854b812e86e18182dbdf6dce9e6d73a8d3e1f2d7b401
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af26affe0875ee56f6153bfdb175f3cc00e03da4591b1fe5dd251a3cc394b603
[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" "af26affe0875ee56f6153bfdb175f3cc00e03da4591b1fe5dd251a3cc394b603", kill_on_drop: false }`
[INFO] [stderr]     Checking ascii_utils v0.9.3
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]     Checking fast_chemail v0.9.6
[INFO] [stderr]     Checking pretty_assertions v0.1.2
[INFO] [stderr]     Checking mailchecker v3.3.12 (/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 2.41s
[INFO] running `Command { std: "docker" "inspect" "af26affe0875ee56f6153bfdb175f3cc00e03da4591b1fe5dd251a3cc394b603", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af26affe0875ee56f6153bfdb175f3cc00e03da4591b1fe5dd251a3cc394b603", kill_on_drop: false }`
[INFO] [stdout] af26affe0875ee56f6153bfdb175f3cc00e03da4591b1fe5dd251a3cc394b603