[INFO] fetching crate wm8731 0.1.0...
[INFO] testing wm8731-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate wm8731 0.1.0 into /workspace/builds/worker-53/source
[INFO] validating manifest of crates.io crate wm8731 0.1.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-53/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-2022-04-10" "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-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6dd186594b88eb6a3295384e474dcbfc2419de03fad3dc2df4681db9dddf669
[INFO] running `Command { std: "docker" "start" "-a" "f6dd186594b88eb6a3295384e474dcbfc2419de03fad3dc2df4681db9dddf669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6dd186594b88eb6a3295384e474dcbfc2419de03fad3dc2df4681db9dddf669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6dd186594b88eb6a3295384e474dcbfc2419de03fad3dc2df4681db9dddf669", kill_on_drop: false }`
[INFO] [stdout] f6dd186594b88eb6a3295384e474dcbfc2419de03fad3dc2df4681db9dddf669
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 316d6a71a2894d04b93bcb3c0c14d595ea865aa05c331b7081c619824fb94ac9
[INFO] running `Command { std: "docker" "start" "-a" "316d6a71a2894d04b93bcb3c0c14d595ea865aa05c331b7081c619824fb94ac9", 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 2.15s
[INFO] running `Command { std: "docker" "inspect" "316d6a71a2894d04b93bcb3c0c14d595ea865aa05c331b7081c619824fb94ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "316d6a71a2894d04b93bcb3c0c14d595ea865aa05c331b7081c619824fb94ac9", kill_on_drop: false }`
[INFO] [stdout] 316d6a71a2894d04b93bcb3c0c14d595ea865aa05c331b7081c619824fb94ac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 967ea9fe71b3090e9f56bbe5ff95833b2e43b38f5f30b0318c24a43d5b6e9efc
[INFO] running `Command { std: "docker" "start" "-a" "967ea9fe71b3090e9f56bbe5ff95833b2e43b38f5f30b0318c24a43d5b6e9efc", kill_on_drop: false }`
[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 0.76s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/wm8731-38883a56bc26f35b)
[INFO] running `Command { std: "docker" "inspect" "967ea9fe71b3090e9f56bbe5ff95833b2e43b38f5f30b0318c24a43d5b6e9efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "967ea9fe71b3090e9f56bbe5ff95833b2e43b38f5f30b0318c24a43d5b6e9efc", kill_on_drop: false }`
[INFO] [stdout] 967ea9fe71b3090e9f56bbe5ff95833b2e43b38f5f30b0318c24a43d5b6e9efc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 02f6eedf6f313ffe7f0a0a672e31305913c607edbfd68c7b3c44d607d25146d4
[INFO] running `Command { std: "docker" "start" "-a" "02f6eedf6f313ffe7f0a0a672e31305913c607edbfd68c7b3c44d607d25146d4", 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 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/wm8731-38883a56bc26f35b)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::possible_real_world ... ok
[INFO] [stdout] test tests::power_down ... ok
[INFO] [stdout] test tests::sampling_rate ... ok
[INFO] [stderr]    Doc-tests wm8731
[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 0.02s
[INFO] [stdout] 
[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 0.38s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "02f6eedf6f313ffe7f0a0a672e31305913c607edbfd68c7b3c44d607d25146d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02f6eedf6f313ffe7f0a0a672e31305913c607edbfd68c7b3c44d607d25146d4", kill_on_drop: false }`
[INFO] [stdout] 02f6eedf6f313ffe7f0a0a672e31305913c607edbfd68c7b3c44d607d25146d4