[INFO] fetching crate bs1770 1.0.0...
[INFO] checking bs1770-1.0.0 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate bs1770 1.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate bs1770 1.0.0 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bs1770 1.0.0
[INFO] finished tweaking crates.io crate bs1770 1.0.0
[INFO] tweaked toml for crates.io crate bs1770 1.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate bs1770 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b24783370632862ec600e1964d6d3a038a5c1995c6b4f9f58006d8dbbe386fcd
[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" "b24783370632862ec600e1964d6d3a038a5c1995c6b4f9f58006d8dbbe386fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b24783370632862ec600e1964d6d3a038a5c1995c6b4f9f58006d8dbbe386fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b24783370632862ec600e1964d6d3a038a5c1995c6b4f9f58006d8dbbe386fcd", kill_on_drop: false }`
[INFO] [stdout] b24783370632862ec600e1964d6d3a038a5c1995c6b4f9f58006d8dbbe386fcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f36f7b9a323af93696fd3eaeee6664fd18e6d41bd9bafeda17fc22d0eb09f2e
[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" "5f36f7b9a323af93696fd3eaeee6664fd18e6d41bd9bafeda17fc22d0eb09f2e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stderr]     Checking bs1770 v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking libc v0.2.76
[INFO] [stdout] warning: unused variable: `mean_power`
[INFO] [stdout]   --> examples/waveform.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mean_power = bs1770::gated_mean(zipped.as_ref());
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mean_power`
[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 2.28s
[INFO] running `Command { std: "docker" "inspect" "5f36f7b9a323af93696fd3eaeee6664fd18e6d41bd9bafeda17fc22d0eb09f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f36f7b9a323af93696fd3eaeee6664fd18e6d41bd9bafeda17fc22d0eb09f2e", kill_on_drop: false }`
[INFO] [stdout] 5f36f7b9a323af93696fd3eaeee6664fd18e6d41bd9bafeda17fc22d0eb09f2e