[INFO] cloning repository https://github.com/monsieursquirrel/every_beat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/monsieursquirrel/every_beat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonsieursquirrel%2Fevery_beat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonsieursquirrel%2Fevery_beat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f349e36eee58bd6e15f0d2c5f35a96459cb1930
[INFO] testing monsieursquirrel/every_beat against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonsieursquirrel%2Fevery_beat" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/monsieursquirrel/every_beat on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/monsieursquirrel/every_beat
[INFO] finished tweaking git repo https://github.com/monsieursquirrel/every_beat
[INFO] tweaked toml for git repo https://github.com/monsieursquirrel/every_beat written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/monsieursquirrel/every_beat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5be2a37182c4fed65fa51345541b895f2af4440664021d51ea087bb6b5963bd
[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" "c5be2a37182c4fed65fa51345541b895f2af4440664021d51ea087bb6b5963bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5be2a37182c4fed65fa51345541b895f2af4440664021d51ea087bb6b5963bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5be2a37182c4fed65fa51345541b895f2af4440664021d51ea087bb6b5963bd", kill_on_drop: false }`
[INFO] [stdout] c5be2a37182c4fed65fa51345541b895f2af4440664021d51ea087bb6b5963bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81c9f163f74b14473823a2f43c4ef19e970f097d55e6514c33642ce6e0d95fe6
[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" "81c9f163f74b14473823a2f43c4ef19e970f097d55e6514c33642ce6e0d95fe6", kill_on_drop: false }`
[INFO] [stderr]    Compiling ansi_term v0.6.3
[INFO] [stderr]    Compiling clap v1.2.0
[INFO] [stderr]    Compiling every_beat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/step_to_midi.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     -> Box<Iterator<Item=u8> + 'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8> + 'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/step_to_midi.rs:76:46
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let track_len_location = file_data.len();;
[INFO] [stdout]    |                                              ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/midi_variable_len.rs:11:51
[INFO] [stdout]    |
[INFO] [stdout] 11 |     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stdout]    |                                                   ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 11 -     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stdout] 11 +     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if i == 0 { 0 } else { 0x80 } )
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/patterns.rs:117:47
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn step_iterator<'a>(&'a self) -> Box<Iterator<Item=Vec<Note>> + 'a> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Vec<Note>> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SubCommand`
[INFO] [stdout]  --> src/main.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | use clap::{Arg, App, SubCommand};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:55:14
[INFO] [stdout]    |
[INFO] [stdout] 55 |     for i in (0..num_bars) {
[INFO] [stdout]    |              ^           ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 55 -     for i in (0..num_bars) {
[INFO] [stdout] 55 +     for i in 0..num_bars {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | /     File::create(outfile)
[INFO] [stdout] 64 | |     .and_then(|mut file| file.write_all(&file_data[..]) );
[INFO] [stdout]    | |__________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.94s
[INFO] running `Command { std: "docker" "inspect" "81c9f163f74b14473823a2f43c4ef19e970f097d55e6514c33642ce6e0d95fe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c9f163f74b14473823a2f43c4ef19e970f097d55e6514c33642ce6e0d95fe6", kill_on_drop: false }`
[INFO] [stdout] 81c9f163f74b14473823a2f43c4ef19e970f097d55e6514c33642ce6e0d95fe6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d16794a4cb5434f28c2e5edd0a15c00d764ca43266a3bcbd0557906465aaaa97
[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" "d16794a4cb5434f28c2e5edd0a15c00d764ca43266a3bcbd0557906465aaaa97", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling every_beat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/step_to_midi.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     -> Box<Iterator<Item=u8> + 'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8> + 'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/step_to_midi.rs:76:46
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let track_len_location = file_data.len();;
[INFO] [stdout]    |                                              ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/midi_variable_len.rs:11:51
[INFO] [stdout]    |
[INFO] [stdout] 11 |     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stdout]    |                                                   ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 11 -     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stdout] 11 +     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if i == 0 { 0 } else { 0x80 } )
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/patterns.rs:117:47
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn step_iterator<'a>(&'a self) -> Box<Iterator<Item=Vec<Note>> + 'a> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Vec<Note>> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SubCommand`
[INFO] [stdout]  --> src/main.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | use clap::{Arg, App, SubCommand};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:55:14
[INFO] [stdout]    |
[INFO] [stdout] 55 |     for i in (0..num_bars) {
[INFO] [stdout]    |              ^           ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 55 -     for i in (0..num_bars) {
[INFO] [stdout] 55 +     for i in 0..num_bars {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | /     File::create(outfile)
[INFO] [stdout] 64 | |     .and_then(|mut file| file.write_all(&file_data[..]) );
[INFO] [stdout]    | |__________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "d16794a4cb5434f28c2e5edd0a15c00d764ca43266a3bcbd0557906465aaaa97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d16794a4cb5434f28c2e5edd0a15c00d764ca43266a3bcbd0557906465aaaa97", kill_on_drop: false }`
[INFO] [stdout] d16794a4cb5434f28c2e5edd0a15c00d764ca43266a3bcbd0557906465aaaa97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7ee5255470efebe55b9575bf6c8e1b4b2d9154780e05c2e9cdf5394c40cea3ab
[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" "7ee5255470efebe55b9575bf6c8e1b4b2d9154780e05c2e9cdf5394c40cea3ab", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] running 1 test
[INFO] [stderr]   --> src/step_to_midi.rs:13:12
[INFO] [stdout] test midi_variable_len::sample_values ... ok
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 13 |     -> Box<Iterator<Item=u8> + 'a> {
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8> + 'a`
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/step_to_midi.rs:76:46
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let track_len_location = file_data.len();;
[INFO] [stderr]    |                                              ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/midi_variable_len.rs:11:51
[INFO] [stderr]    |
[INFO] [stderr] 11 |     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stderr]    |                                                   ^      ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 11 -     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if (i == 0) { 0 } else { 0x80 } )
[INFO] [stderr] 11 +     .map(|i| ((val >> (i * 7)) & 0x7f) as u8 | if i == 0 { 0 } else { 0x80 } )
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/patterns.rs:117:47
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn step_iterator<'a>(&'a self) -> Box<Iterator<Item=Vec<Note>> + 'a> {
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Vec<Note>> + 'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SubCommand`
[INFO] [stderr]  --> src/main.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 | use clap::{Arg, App, SubCommand};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/main.rs:55:14
[INFO] [stderr]    |
[INFO] [stderr] 55 |     for i in (0..num_bars) {
[INFO] [stderr]    |              ^           ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 55 -     for i in (0..num_bars) {
[INFO] [stderr] 55 +     for i in 0..num_bars {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 | /     File::create(outfile)
[INFO] [stderr] 64 | |     .and_then(|mut file| file.write_all(&file_data[..]) );
[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: `every_beat` (bin "every_beat" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/every_beat-f4a856d799bdd739)
[INFO] running `Command { std: "docker" "inspect" "7ee5255470efebe55b9575bf6c8e1b4b2d9154780e05c2e9cdf5394c40cea3ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ee5255470efebe55b9575bf6c8e1b4b2d9154780e05c2e9cdf5394c40cea3ab", kill_on_drop: false }`
[INFO] [stdout] 7ee5255470efebe55b9575bf6c8e1b4b2d9154780e05c2e9cdf5394c40cea3ab