[INFO] updating cached repository https://github.com/cmaves/VisualSpectrum
[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] 2eb385d1c1ffb1b4d9e07ba0ce6b425b5dbdfe72
[INFO] checking cmaves/VisualSpectrum against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcmaves%2FVisualSpectrum" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cmaves/VisualSpectrum on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cmaves/VisualSpectrum
[INFO] finished tweaking git repo https://github.com/cmaves/VisualSpectrum
[INFO] tweaked toml for git repo https://github.com/cmaves/VisualSpectrum written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cmaves/VisualSpectrum already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 7ac6ef4b0d1dbf83b26c82d1cfd6d16ba7a0cc68f7e24c0a5f50831ec3d0725f
[INFO] running `"docker" "start" "-a" "7ac6ef4b0d1dbf83b26c82d1cfd6d16ba7a0cc68f7e24c0a5f50831ec3d0725f"`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]     Checking rustfft v3.0.0
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[INFO] [stderr] warning: field is never read: `sample_size`
[INFO] [stderr]   --> src/audio.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     sample_size: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `source`
[INFO] [stderr]   --> src/audio.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     source: ActiveSource
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `frame_len`
[INFO] [stderr]    --> src/midi.rs:134:5
[INFO] [stderr]     |
[INFO] [stderr] 134 |     frame_len: u64,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `fps`
[INFO] [stderr]    --> src/midi.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fps: u32
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pulse`
[INFO] [stderr]   --> src/visualmidi.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pulse: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/led.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             self.controller.render();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `sample_size`
[INFO] [stderr]   --> src/audio.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     sample_size: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `source`
[INFO] [stderr]   --> src/audio.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     source: ActiveSource
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `frame_len`
[INFO] [stderr]    --> src/midi.rs:134:5
[INFO] [stderr]     |
[INFO] [stderr] 134 |     frame_len: u64,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `fps`
[INFO] [stderr]    --> src/midi.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fps: u32
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pulse`
[INFO] [stderr]   --> src/visualmidi.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pulse: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/led.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             self.controller.render();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     midi_con.display(jack_client);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     midi_con.display(jack_client);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `"docker" "inspect" "7ac6ef4b0d1dbf83b26c82d1cfd6d16ba7a0cc68f7e24c0a5f50831ec3d0725f"`
[INFO] running `"docker" "rm" "-f" "7ac6ef4b0d1dbf83b26c82d1cfd6d16ba7a0cc68f7e24c0a5f50831ec3d0725f"`
[INFO] [stdout] 7ac6ef4b0d1dbf83b26c82d1cfd6d16ba7a0cc68f7e24c0a5f50831ec3d0725f