[INFO] fetching crate wm8731 0.1.0...
[INFO] testing wm8731-0.1.0 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate wm8731 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate wm8731 0.1.0 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b9221d808a921d425d2cef602e2c7ac25b037186d48638122cd6ce30e905cb0
[INFO] running `Command { std: "docker" "start" "-a" "8b9221d808a921d425d2cef602e2c7ac25b037186d48638122cd6ce30e905cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b9221d808a921d425d2cef602e2c7ac25b037186d48638122cd6ce30e905cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b9221d808a921d425d2cef602e2c7ac25b037186d48638122cd6ce30e905cb0", kill_on_drop: false }`
[INFO] [stdout] 8b9221d808a921d425d2cef602e2c7ac25b037186d48638122cd6ce30e905cb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65c66a897656c49abf619454fb9f2531deefc3ae72e2cdfaf0ce39c9d9e96f34
[INFO] running `Command { std: "docker" "start" "-a" "65c66a897656c49abf619454fb9f2531deefc3ae72e2cdfaf0ce39c9d9e96f34", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 1.31s
[INFO] running `Command { std: "docker" "inspect" "65c66a897656c49abf619454fb9f2531deefc3ae72e2cdfaf0ce39c9d9e96f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65c66a897656c49abf619454fb9f2531deefc3ae72e2cdfaf0ce39c9d9e96f34", kill_on_drop: false }`
[INFO] [stdout] 65c66a897656c49abf619454fb9f2531deefc3ae72e2cdfaf0ce39c9d9e96f34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d468ec4e02eb2382646c5d8b268410e5fb72211e765b3114fdcd4c6fa9413ee5
[INFO] running `Command { std: "docker" "start" "-a" "d468ec4e02eb2382646c5d8b268410e5fb72211e765b3114fdcd4c6fa9413ee5", 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] [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 2.12s
[INFO] running `Command { std: "docker" "inspect" "d468ec4e02eb2382646c5d8b268410e5fb72211e765b3114fdcd4c6fa9413ee5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d468ec4e02eb2382646c5d8b268410e5fb72211e765b3114fdcd4c6fa9413ee5", kill_on_drop: false }`
[INFO] [stdout] d468ec4e02eb2382646c5d8b268410e5fb72211e765b3114fdcd4c6fa9413ee5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6e25cd82bb324c38cfba7183c869a6e0d2823e6796227814bed93ae68be5f2a6
[INFO] running `Command { std: "docker" "start" "-a" "6e25cd82bb324c38cfba7183c869a6e0d2823e6796227814bed93ae68be5f2a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 2.44s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/wm8731-a0f1e87d8b372c31)
[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 0.06s
[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 2.04s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6e25cd82bb324c38cfba7183c869a6e0d2823e6796227814bed93ae68be5f2a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e25cd82bb324c38cfba7183c869a6e0d2823e6796227814bed93ae68be5f2a6", kill_on_drop: false }`
[INFO] [stdout] 6e25cd82bb324c38cfba7183c869a6e0d2823e6796227814bed93ae68be5f2a6