[INFO] fetching crate wm8731 0.1.0...
[INFO] testing wm8731-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate wm8731 0.1.0 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate wm8731 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wm8731 0.1.0
[INFO] finished tweaking crates.io crate wm8731 0.1.0
[INFO] tweaked toml for crates.io crate wm8731 0.1.0 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--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-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 006137571b5771c97d5a7ea3d1a65610183010245b8c899baccbb3cbca3d32a0
[INFO] running `Command { std: "docker" "start" "-a" "006137571b5771c97d5a7ea3d1a65610183010245b8c899baccbb3cbca3d32a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "006137571b5771c97d5a7ea3d1a65610183010245b8c899baccbb3cbca3d32a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "006137571b5771c97d5a7ea3d1a65610183010245b8c899baccbb3cbca3d32a0", kill_on_drop: false }`
[INFO] [stdout] 006137571b5771c97d5a7ea3d1a65610183010245b8c899baccbb3cbca3d32a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53af81836a9a0cbc4fb57b8c6ebb74dc498cc7e875c539b0317801dc93ddd94b
[INFO] running `Command { std: "docker" "start" "-a" "53af81836a9a0cbc4fb57b8c6ebb74dc498cc7e875c539b0317801dc93ddd94b", kill_on_drop: false }`
[INFO] [stderr]    Compiling wm8731 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `volume`
[INFO] [stdout]   --> src/headphone_out.rs:24:30
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn volume(&mut self, volume: u16) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_volume`
[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 1.12s
[INFO] running `Command { std: "docker" "inspect" "53af81836a9a0cbc4fb57b8c6ebb74dc498cc7e875c539b0317801dc93ddd94b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53af81836a9a0cbc4fb57b8c6ebb74dc498cc7e875c539b0317801dc93ddd94b", kill_on_drop: false }`
[INFO] [stdout] 53af81836a9a0cbc4fb57b8c6ebb74dc498cc7e875c539b0317801dc93ddd94b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0939a4adf8c4f79aa206c94e487dfd43189e9582a1b9fa3f21b947697b074af0
[INFO] running `Command { std: "docker" "start" "-a" "0939a4adf8c4f79aa206c94e487dfd43189e9582a1b9fa3f21b947697b074af0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused variable: `volume`
[INFO] [stdout]   --> src/headphone_out.rs:24:30
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn volume(&mut self, volume: u16) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_volume`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling wm8731 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `volume`
[INFO] [stdout]   --> src/headphone_out.rs:24:30
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn volume(&mut self, volume: u16) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_volume`
[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 test [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "0939a4adf8c4f79aa206c94e487dfd43189e9582a1b9fa3f21b947697b074af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0939a4adf8c4f79aa206c94e487dfd43189e9582a1b9fa3f21b947697b074af0", kill_on_drop: false }`
[INFO] [stdout] 0939a4adf8c4f79aa206c94e487dfd43189e9582a1b9fa3f21b947697b074af0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c893af334e76f424f5b4ab04f6f951bc2dfa66b7ea304f989953ce0e486ea6b8
[INFO] running `Command { std: "docker" "start" "-a" "c893af334e76f424f5b4ab04f6f951bc2dfa66b7ea304f989953ce0e486ea6b8", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `volume`
[INFO] [stderr]   --> src/headphone_out.rs:24:30
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn volume(&mut self, volume: u16) {
[INFO] [stderr]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_volume`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `wm8731` (lib) generated 1 warning
[INFO] [stderr] warning: `wm8731` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/wm8731-38883a56bc26f35b)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::sampling_rate ... ok
[INFO] [stdout] test tests::possible_real_world ... ok
[INFO] [stdout] test tests::power_down ... ok
[INFO] [stdout] test tests::line_input_volume ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests wm8731
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 10) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c893af334e76f424f5b4ab04f6f951bc2dfa66b7ea304f989953ce0e486ea6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c893af334e76f424f5b4ab04f6f951bc2dfa66b7ea304f989953ce0e486ea6b8", kill_on_drop: false }`
[INFO] [stdout] c893af334e76f424f5b4ab04f6f951bc2dfa66b7ea304f989953ce0e486ea6b8