[INFO] updating cached repository connorwalsh/fmsynth
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/connorwalsh/fmsynth
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/connorwalsh/fmsynth" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/connorwalsh/fmsynth"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/connorwalsh/fmsynth'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/connorwalsh/fmsynth" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/connorwalsh/fmsynth"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/connorwalsh/fmsynth'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f09aebffab1261f5524a9057ac212988419c0dda
[INFO] sha for GitHub repo connorwalsh/fmsynth: f09aebffab1261f5524a9057ac212988419c0dda
[INFO] validating manifest of connorwalsh/fmsynth on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of connorwalsh/fmsynth on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing connorwalsh/fmsynth
[INFO] finished frobbing connorwalsh/fmsynth
[INFO] frobbed toml for connorwalsh/fmsynth written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/connorwalsh/fmsynth/Cargo.toml
[INFO] started frobbing connorwalsh/fmsynth
[INFO] finished frobbing connorwalsh/fmsynth
[INFO] frobbed toml for connorwalsh/fmsynth written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/connorwalsh/fmsynth/Cargo.toml
[INFO] crate connorwalsh/fmsynth already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking connorwalsh/fmsynth against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/connorwalsh/fmsynth:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a915aace34196e2bab8369e39f0449c4d51a89be53bcc5d104857e41a0478356
[INFO] running `"docker" "start" "-a" "a915aace34196e2bab8369e39f0449c4d51a89be53bcc5d104857e41a0478356"`
[INFO] [stderr]     Checking alsa-sys v0.1.2
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]     Checking fmsynth v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `StreamData`, `UnknownTypeOutputBuffer`
[INFO] [stderr]  --> src/synthesis/pcm.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     StreamData,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 9 |     UnknownTypeOutputBuffer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `StreamData`, `UnknownTypeOutputBuffer`
[INFO] [stderr]  --> src/synthesis/pcm.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     StreamData,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 9 |     UnknownTypeOutputBuffer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let operator = synthesis::Operator::new(
[INFO] [stderr]   |         ^^^^^^^^ help: consider prefixing with an underscore: `_operator`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let operator = synthesis::Operator::new(
[INFO] [stderr]   |         ^^^^^^^^ help: consider prefixing with an underscore: `_operator`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `frequency`
[INFO] [stderr]  --> src/synthesis/operator.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     frequency: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `amplitude`
[INFO] [stderr]  --> src/synthesis/operator.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     amplitude: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sample_rate`
[INFO] [stderr]  --> src/synthesis/operator.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     sample_rate: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Sine`
[INFO] [stderr]  --> src/synthesis/waveform.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Sine {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `device`
[INFO] [stderr]   --> src/synthesis/pcm.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     device: Device,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stream`
[INFO] [stderr]   --> src/synthesis/pcm.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     stream: StreamId,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `frequency`
[INFO] [stderr]  --> src/synthesis/operator.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     frequency: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `amplitude`
[INFO] [stderr]  --> src/synthesis/operator.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     amplitude: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sample_rate`
[INFO] [stderr]  --> src/synthesis/operator.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     sample_rate: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Sine`
[INFO] [stderr]  --> src/synthesis/waveform.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Sine {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `device`
[INFO] [stderr]   --> src/synthesis/pcm.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     device: Device,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stream`
[INFO] [stderr]   --> src/synthesis/pcm.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     stream: StreamId,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "a915aace34196e2bab8369e39f0449c4d51a89be53bcc5d104857e41a0478356"`
[INFO] running `"docker" "rm" "-f" "a915aace34196e2bab8369e39f0449c4d51a89be53bcc5d104857e41a0478356"`
[INFO] [stdout] a915aace34196e2bab8369e39f0449c4d51a89be53bcc5d104857e41a0478356