[INFO] fetching crate argwerk 0.20.0...
[INFO] checking argwerk-0.20.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate argwerk 0.20.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate argwerk 0.20.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate argwerk 0.20.0
[INFO] finished tweaking crates.io crate argwerk 0.20.0
[INFO] tweaked toml for crates.io crate argwerk 0.20.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate argwerk 0.20.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc92d752f84c67ebf862cde8186243701ab6a4b3603ba993a219b20c771c476d
[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" "fc92d752f84c67ebf862cde8186243701ab6a4b3603ba993a219b20c771c476d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc92d752f84c67ebf862cde8186243701ab6a4b3603ba993a219b20c771c476d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc92d752f84c67ebf862cde8186243701ab6a4b3603ba993a219b20c771c476d", kill_on_drop: false }`
[INFO] [stdout] fc92d752f84c67ebf862cde8186243701ab6a4b3603ba993a219b20c771c476d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 6d6b287c1421d9f595c293490c3c6409cfa7ce0aeb82ccb2c0dbbc31e7bf4921
[INFO] running `Command { std: "docker" "start" "-a" "6d6b287c1421d9f595c293490c3c6409cfa7ce0aeb82ccb2c0dbbc31e7bf4921", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.37
[INFO] [stderr]     Checking argwerk v0.20.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `thing`
[INFO] [stdout]   --> examples/tour.rs:43:46
[INFO] [stdout]    |
[INFO] [stdout] 43 |     ["--really-really-really-long-argument", thing] => {
[INFO] [stdout]    |                                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_thing`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 1.15s
[INFO] running `Command { std: "docker" "inspect" "6d6b287c1421d9f595c293490c3c6409cfa7ce0aeb82ccb2c0dbbc31e7bf4921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d6b287c1421d9f595c293490c3c6409cfa7ce0aeb82ccb2c0dbbc31e7bf4921", kill_on_drop: false }`
[INFO] [stdout] 6d6b287c1421d9f595c293490c3c6409cfa7ce0aeb82ccb2c0dbbc31e7bf4921