[INFO] fetching crate mailchecker 3.3.14...
[INFO] checking mailchecker-3.3.14 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate mailchecker 3.3.14 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mailchecker 3.3.14 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mailchecker 3.3.14
[INFO] finished tweaking crates.io crate mailchecker 3.3.14
[INFO] tweaked toml for crates.io crate mailchecker 3.3.14 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate mailchecker 3.3.14 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7016ef48b6db7afb3017dc48a61cdf8f9b2a31e6f6561fbb40d6cfddf570e803
[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" "7016ef48b6db7afb3017dc48a61cdf8f9b2a31e6f6561fbb40d6cfddf570e803", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7016ef48b6db7afb3017dc48a61cdf8f9b2a31e6f6561fbb40d6cfddf570e803", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7016ef48b6db7afb3017dc48a61cdf8f9b2a31e6f6561fbb40d6cfddf570e803", kill_on_drop: false }`
[INFO] [stdout] 7016ef48b6db7afb3017dc48a61cdf8f9b2a31e6f6561fbb40d6cfddf570e803
[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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e06eec90c4c571e58921fafc61f0a771e95859f3b31dccb242e7ce950aa5fc1e
[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" "e06eec90c4c571e58921fafc61f0a771e95859f3b31dccb242e7ce950aa5fc1e", kill_on_drop: false }`
[INFO] [stderr]     Checking ascii_utils v0.9.3
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]     Checking pretty_assertions v0.1.2
[INFO] [stderr]     Checking fast_chemail v0.9.6
[INFO] [stderr]     Checking mailchecker v3.3.14 (/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 2.14s
[INFO] running `Command { std: "docker" "inspect" "e06eec90c4c571e58921fafc61f0a771e95859f3b31dccb242e7ce950aa5fc1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e06eec90c4c571e58921fafc61f0a771e95859f3b31dccb242e7ce950aa5fc1e", kill_on_drop: false }`
[INFO] [stdout] e06eec90c4c571e58921fafc61f0a771e95859f3b31dccb242e7ce950aa5fc1e