[INFO] cloning repository https://github.com/connorwalsh/fmsynth
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/connorwalsh/fmsynth" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Ffmsynth", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Ffmsynth'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f09aebffab1261f5524a9057ac212988419c0dda
[INFO] checking connorwalsh/fmsynth against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Ffmsynth" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/connorwalsh/fmsynth on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/connorwalsh/fmsynth
[INFO] finished tweaking git repo https://github.com/connorwalsh/fmsynth
[INFO] tweaked toml for git repo https://github.com/connorwalsh/fmsynth written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/connorwalsh/fmsynth already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cba0fc1857bfdb808bb612cfa23fc774913db2a7d2f5568626ec0e68e69904a9
[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" "cba0fc1857bfdb808bb612cfa23fc774913db2a7d2f5568626ec0e68e69904a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cba0fc1857bfdb808bb612cfa23fc774913db2a7d2f5568626ec0e68e69904a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cba0fc1857bfdb808bb612cfa23fc774913db2a7d2f5568626ec0e68e69904a9", kill_on_drop: false }`
[INFO] [stdout] cba0fc1857bfdb808bb612cfa23fc774913db2a7d2f5568626ec0e68e69904a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c893f4a148cf4d502bc1813d83fc5faaad01ba9738723a7f44aea57782f80e09
[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" "c893f4a148cf4d502bc1813d83fc5faaad01ba9738723a7f44aea57782f80e09", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]     Checking fmsynth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `StreamData`, `UnknownTypeOutputBuffer`
[INFO] [stdout]  --> src/synthesis/pcm.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     StreamData,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 9 |     UnknownTypeOutputBuffer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let operator = synthesis::Operator::new(
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `StreamData`, `UnknownTypeOutputBuffer`
[INFO] [stdout]  --> src/synthesis/pcm.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     StreamData,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 9 |     UnknownTypeOutputBuffer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `frequency`
[INFO] [stdout]  --> src/synthesis/operator.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     frequency: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `amplitude`
[INFO] [stdout]  --> src/synthesis/operator.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     amplitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sample_rate`
[INFO] [stdout]  --> src/synthesis/operator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     sample_rate: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Sine`
[INFO] [stdout]  --> src/synthesis/waveform.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Sine {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `device`
[INFO] [stdout]   --> src/synthesis/pcm.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     device: Device,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stream`
[INFO] [stdout]   --> src/synthesis/pcm.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     stream: StreamId,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let operator = synthesis::Operator::new(
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `frequency`
[INFO] [stdout]  --> src/synthesis/operator.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     frequency: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `amplitude`
[INFO] [stdout]  --> src/synthesis/operator.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     amplitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sample_rate`
[INFO] [stdout]  --> src/synthesis/operator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     sample_rate: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Sine`
[INFO] [stdout]  --> src/synthesis/waveform.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Sine {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `device`
[INFO] [stdout]   --> src/synthesis/pcm.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     device: Device,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stream`
[INFO] [stdout]   --> src/synthesis/pcm.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     stream: StreamId,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.28s
[INFO] running `Command { std: "docker" "inspect" "c893f4a148cf4d502bc1813d83fc5faaad01ba9738723a7f44aea57782f80e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c893f4a148cf4d502bc1813d83fc5faaad01ba9738723a7f44aea57782f80e09", kill_on_drop: false }`
[INFO] [stdout] c893f4a148cf4d502bc1813d83fc5faaad01ba9738723a7f44aea57782f80e09