[INFO] fetching crate argwerk 0.20.0...
[INFO] checking argwerk-0.20.0 against try#32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d for pr-83312
[INFO] extracting crate argwerk 0.20.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate argwerk 0.20.0 on toolchain 32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "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-0/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" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.37
[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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "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] 3ade8e23b07b6f9751fe51839fe172376f6781cf393a00c462d81d23b1a8462b
[INFO] running `Command { std: "docker" "start" "-a" "3ade8e23b07b6f9751fe51839fe172376f6781cf393a00c462d81d23b1a8462b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ade8e23b07b6f9751fe51839fe172376f6781cf393a00c462d81d23b1a8462b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ade8e23b07b6f9751fe51839fe172376f6781cf393a00c462d81d23b1a8462b", kill_on_drop: false }`
[INFO] [stdout] 3ade8e23b07b6f9751fe51839fe172376f6781cf393a00c462d81d23b1a8462b
[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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0819157eba5dbf1c58b024c4e892fe246a1413a36bad0a8f6ec5bfaa7c91d4e
[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" "e0819157eba5dbf1c58b024c4e892fe246a1413a36bad0a8f6ec5bfaa7c91d4e", 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 1.92s
[INFO] running `Command { std: "docker" "inspect" "e0819157eba5dbf1c58b024c4e892fe246a1413a36bad0a8f6ec5bfaa7c91d4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0819157eba5dbf1c58b024c4e892fe246a1413a36bad0a8f6ec5bfaa7c91d4e", kill_on_drop: false }`
[INFO] [stdout] e0819157eba5dbf1c58b024c4e892fe246a1413a36bad0a8f6ec5bfaa7c91d4e