[INFO] updating cached repository https://github.com/vitobasso/rust-synth
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b7561a9515b2c2ef8d47d282fe8cf147c456f797
[INFO] checking vitobasso/rust-synth against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitobasso%2Frust-synth" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vitobasso/rust-synth on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/vitobasso/rust-synth
[INFO] finished tweaking git repo https://github.com/vitobasso/rust-synth
[INFO] tweaked toml for git repo https://github.com/vitobasso/rust-synth written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/vitobasso/rust-synth already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8ead4abf198e24f5b0bd4b8a3a7134189ce89a104da2e47f6393665ed13e2581
[INFO] running `"docker" "start" "-a" "8ead4abf198e24f5b0bd4b8a3a7134189ce89a104da2e47f6393665ed13e2581"`
[INFO] [stderr]     Checking stb_truetype v0.2.2
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]     Checking winit v0.16.2
[INFO] [stderr]     Checking rusttype v0.5.2
[INFO] [stderr]    Compiling glutin v0.17.0
[INFO] [stderr]    Compiling glium v0.22.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]     Checking rimd v0.0.2 (https://github.com/RustAudio/rimd.git#6e623dbc)
[INFO] [stderr]    Compiling conrod_derive v0.1.2
[INFO] [stderr]     Checking pistoncore-input v0.21.0
[INFO] [stderr]     Checking conrod v0.61.1
[INFO] [stderr]     Checking rust-synth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/music_theory/pitch.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         (f0 * a.powf(n as f64))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/oscillator.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         (((clock + phase) * freq) % 1.)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/envelope.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             (elapsed / self.attack)
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/music_theory/pitch.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         (f0 * a.powf(n as f64))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/oscillator.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         (((clock + phase) * freq) % 1.)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/envelope.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             (elapsed / self.attack)
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `end`
[INFO] [stderr]    --> src/core/control/song.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     end: Instant,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `end`
[INFO] [stderr]    --> src/core/control/song.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     end: Instant,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/music_theory/pitch.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         (f0 * a.powf(n as f64))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/oscillator.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         (((clock + phase) * freq) % 1.)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/envelope.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             (elapsed / self.attack)
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/music_theory/pitch.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         (f0 * a.powf(n as f64))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/oscillator.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         (((clock + phase) * freq) % 1.)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/core/synth/envelope.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             (elapsed / self.attack)
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `end`
[INFO] [stderr]    --> src/core/control/song.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     end: Instant,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `end`
[INFO] [stderr]    --> src/core/control/song.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     end: Instant,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `"docker" "inspect" "8ead4abf198e24f5b0bd4b8a3a7134189ce89a104da2e47f6393665ed13e2581"`
[INFO] running `"docker" "rm" "-f" "8ead4abf198e24f5b0bd4b8a3a7134189ce89a104da2e47f6393665ed13e2581"`
[INFO] [stdout] 8ead4abf198e24f5b0bd4b8a3a7134189ce89a104da2e47f6393665ed13e2581