[INFO] cloning repository https://github.com/r0t0r-r0t0r/r0t0blocks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/r0t0r-r0t0r/r0t0blocks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr0t0r-r0t0r%2Fr0t0blocks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr0t0r-r0t0r%2Fr0t0blocks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a177850b602fe8427f86252b945bf5c5fb7e7401
[INFO] testing r0t0r-r0t0r/r0t0blocks against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr0t0r-r0t0r%2Fr0t0blocks" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/r0t0r-r0t0r/r0t0blocks on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/r0t0r-r0t0r/r0t0blocks
[INFO] finished tweaking git repo https://github.com/r0t0r-r0t0r/r0t0blocks
[INFO] tweaked toml for git repo https://github.com/r0t0r-r0t0r/r0t0blocks written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/r0t0r-r0t0r/r0t0blocks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4192242ff64402d39c282aa83d582a283450917a4c1967a83a5ce8db8a7cf195
[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" "4192242ff64402d39c282aa83d582a283450917a4c1967a83a5ce8db8a7cf195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4192242ff64402d39c282aa83d582a283450917a4c1967a83a5ce8db8a7cf195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4192242ff64402d39c282aa83d582a283450917a4c1967a83a5ce8db8a7cf195", kill_on_drop: false }`
[INFO] [stdout] 4192242ff64402d39c282aa83d582a283450917a4c1967a83a5ce8db8a7cf195
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f82917387f067714a4b75ccd0e16cd4f4a726bfe51797cc47524e25645eb84de
[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" "f82917387f067714a4b75ccd0e16cd4f4a726bfe51797cc47524e25645eb84de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling sdl2 v0.34.5
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling fastrand v1.4.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling sdl2-sys v0.34.5
[INFO] [stderr]    Compiling midi v0.1.0 (/opt/rustwide/workdir/midi)
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> midi/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> midi/src/main.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             _ => {},
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_header`
[INFO] [stdout]   --> midi/src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let file_header = read_file_header(&mut f, header_header.length)?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_header`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track_header`
[INFO] [stdout]   --> midi/src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let track_header = read_chunk_header(&mut f)?;
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_header`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps24`
[INFO] [stdout]   --> midi/src/main.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Fps24,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps25`
[INFO] [stdout]   --> midi/src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     Fps25,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps29`
[INFO] [stdout]   --> midi/src/main.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Fps29,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps30`
[INFO] [stdout]   --> midi/src/main.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Fps30,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TicksPerFrame`
[INFO] [stdout]   --> midi/src/main.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     TicksPerFrame(SmpteFormat, u32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `file_format`
[INFO] [stdout]   --> midi/src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     file_format: FileFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `number_of_chunks`
[INFO] [stdout]   --> midi/src/main.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |     number_of_chunks: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `division`
[INFO] [stdout]    --> midi/src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 |     division: Division,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `delta_time`
[INFO] [stdout]    --> midi/src/main.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 104 |     delta_time: u32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]    Compiling enum_dispatch v0.3.6
[INFO] [stderr]    Compiling engine v0.1.0 (/opt/rustwide/workdir/engine)
[INFO] [stderr]    Compiling r0t0blocks v0.1.0 (/opt/rustwide/workdir/blocks)
[INFO] [stderr]    Compiling synth v0.1.0 (/opt/rustwide/workdir/synth)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.88s
[INFO] running `Command { std: "docker" "inspect" "f82917387f067714a4b75ccd0e16cd4f4a726bfe51797cc47524e25645eb84de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f82917387f067714a4b75ccd0e16cd4f4a726bfe51797cc47524e25645eb84de", kill_on_drop: false }`
[INFO] [stdout] f82917387f067714a4b75ccd0e16cd4f4a726bfe51797cc47524e25645eb84de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2ccbbcbbe3de81790c3a26ccce526d4c3abded1b7dfc7c9f7b181a1a8a9fd97
[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" "f2ccbbcbbe3de81790c3a26ccce526d4c3abded1b7dfc7c9f7b181a1a8a9fd97", kill_on_drop: false }`
[INFO] [stderr]    Compiling midi v0.1.0 (/opt/rustwide/workdir/midi)
[INFO] [stderr]    Compiling engine v0.1.0 (/opt/rustwide/workdir/engine)
[INFO] [stderr]    Compiling r0t0blocks v0.1.0 (/opt/rustwide/workdir/blocks)
[INFO] [stderr]    Compiling synth v0.1.0 (/opt/rustwide/workdir/synth)
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> midi/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> midi/src/main.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             _ => {},
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_header`
[INFO] [stdout]   --> midi/src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let file_header = read_file_header(&mut f, header_header.length)?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_header`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track_header`
[INFO] [stdout]   --> midi/src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let track_header = read_chunk_header(&mut f)?;
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_header`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps24`
[INFO] [stdout]   --> midi/src/main.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Fps24,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps25`
[INFO] [stdout]   --> midi/src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     Fps25,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps29`
[INFO] [stdout]   --> midi/src/main.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Fps29,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fps30`
[INFO] [stdout]   --> midi/src/main.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Fps30,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TicksPerFrame`
[INFO] [stdout]   --> midi/src/main.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     TicksPerFrame(SmpteFormat, u32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `file_format`
[INFO] [stdout]   --> midi/src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     file_format: FileFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `number_of_chunks`
[INFO] [stdout]   --> midi/src/main.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |     number_of_chunks: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `division`
[INFO] [stdout]    --> midi/src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 |     division: Division,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `delta_time`
[INFO] [stdout]    --> midi/src/main.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 104 |     delta_time: u32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.26s
[INFO] running `Command { std: "docker" "inspect" "f2ccbbcbbe3de81790c3a26ccce526d4c3abded1b7dfc7c9f7b181a1a8a9fd97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2ccbbcbbe3de81790c3a26ccce526d4c3abded1b7dfc7c9f7b181a1a8a9fd97", kill_on_drop: false }`
[INFO] [stdout] f2ccbbcbbe3de81790c3a26ccce526d4c3abded1b7dfc7c9f7b181a1a8a9fd97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a7e9033afd6b69c5f0934838ceb87b5e1b4e5ed711a5b56d6132710e1f12b678
[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" "a7e9033afd6b69c5f0934838ceb87b5e1b4e5ed711a5b56d6132710e1f12b678", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> midi/src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> midi/src/main.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |             _ => {},
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_header`
[INFO] [stderr]   --> midi/src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let file_header = read_file_header(&mut f, header_header.length)?;
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_header`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `track_header`
[INFO] [stderr]   --> midi/src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let track_header = read_chunk_header(&mut f)?;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_header`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fps24`
[INFO] [stderr]   --> midi/src/main.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 86 |     Fps24,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fps25`
[INFO] [stderr]   --> midi/src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     Fps25,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fps29`
[INFO] [stderr]   --> midi/src/main.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     Fps29,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fps30`
[INFO] [stderr]   --> midi/src/main.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     Fps30,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TicksPerFrame`
[INFO] [stderr]   --> midi/src/main.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     TicksPerFrame(SmpteFormat, u32),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `file_format`
[INFO] [stderr]   --> midi/src/main.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     file_format: FileFormat,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `number_of_chunks`
[INFO] [stderr]   --> midi/src/main.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     number_of_chunks: u32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `division`
[INFO] [stderr]    --> midi/src/main.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     division: Division,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `delta_time`
[INFO] [stderr]    --> midi/src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     delta_time: u32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `midi` (bin "midi" test) generated 13 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/engine-35cdfae9edd6c96c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/midi-8bd747f8da27753f)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test tests::read_variable_length_quantity_10 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_11 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_5 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_6 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_7 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_8 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_9 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_0 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_1 ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r0t0blocks-abd8b1140ca3e7c2)
[INFO] [stdout] test tests::read_variable_length_quantity_4 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_3 ... ok
[INFO] [stdout] test tests::read_variable_length_quantity_2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r0t0blocks-100b06bfd313df3c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/synth-9bc72d8f08492a3a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests engine
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r0t0blocks
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a7e9033afd6b69c5f0934838ceb87b5e1b4e5ed711a5b56d6132710e1f12b678", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7e9033afd6b69c5f0934838ceb87b5e1b4e5ed711a5b56d6132710e1f12b678", kill_on_drop: false }`
[INFO] [stdout] a7e9033afd6b69c5f0934838ceb87b5e1b4e5ed711a5b56d6132710e1f12b678