[INFO] cloning repository https://github.com/grng3r/cryptosteganogram-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grng3r/cryptosteganogram-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrng3r%2Fcryptosteganogram-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrng3r%2Fcryptosteganogram-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 273c1366e8278da64a7d22efe0ee0086ed5487cc
[INFO] checking grng3r/cryptosteganogram-rs against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrng3r%2Fcryptosteganogram-rs" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/grng3r/cryptosteganogram-rs
[INFO] finished tweaking git repo https://github.com/grng3r/cryptosteganogram-rs
[INFO] tweaked toml for git repo https://github.com/grng3r/cryptosteganogram-rs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/grng3r/cryptosteganogram-rs on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/grng3r/cryptosteganogram-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-ident v1.0.17
[INFO] [stderr]   Downloaded midi_file v0.0.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 014d42f824c70d3dca3c72bead8f9829b180f5c5049357eb2900e5285af0600a
[INFO] running `Command { std: "docker" "start" "-a" "014d42f824c70d3dca3c72bead8f9829b180f5c5049357eb2900e5285af0600a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "014d42f824c70d3dca3c72bead8f9829b180f5c5049357eb2900e5285af0600a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "014d42f824c70d3dca3c72bead8f9829b180f5c5049357eb2900e5285af0600a", kill_on_drop: false }`
[INFO] [stdout] 014d42f824c70d3dca3c72bead8f9829b180f5c5049357eb2900e5285af0600a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08c4791b22f4e5a3c837bf3b2ca9a2e97254249419db75fd3947ad382a39473b
[INFO] running `Command { std: "docker" "start" "-a" "08c4791b22f4e5a3c837bf3b2ca9a2e97254249419db75fd3947ad382a39473b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]     Checking strength_reduce v0.2.4
[INFO] [stderr]     Checking hound v3.5.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rustfft v6.2.0
[INFO] [stderr]     Checking cryptosteganogram v0.1.0 (/opt/rustwide/workdir/cryptosteganogram)
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking transpose v0.2.3
[INFO] [stderr]     Checking primal-check v0.3.4
[INFO] [stderr]    Compiling snafu-derive v0.8.5
[INFO] [stderr]     Checking snafu v0.8.5
[INFO] [stderr]     Checking midi_file v0.0.6
[INFO] [stderr]     Checking steganography v0.1.0 (/opt/rustwide/workdir/steganography)
[INFO] [stderr]     Checking musical_cryptogram v0.1.0 (/opt/rustwide/workdir/musical_cryptogram)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:736:17
[INFO] [stdout]     |
[INFO] [stdout] 736 |             let mut n = letter_to_note(scale, c).unwrap();
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:677:5
[INFO] [stdout]     |
[INFO] [stdout] 677 |     track.set_name("Challenge_only_notes");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 677 |     let _ = track.set_name("Challenge_only_notes");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:678:5
[INFO] [stdout]     |
[INFO] [stdout] 678 |     track.set_general_midi(channel, GeneralMidi::ElectricGrandPiano);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 678 |     let _ = track.set_general_midi(channel, GeneralMidi::ElectricGrandPiano);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:736:17
[INFO] [stdout]     |
[INFO] [stdout] 736 |             let mut n = letter_to_note(scale, c).unwrap();
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:677:5
[INFO] [stdout]     |
[INFO] [stdout] 677 |     track.set_name("Challenge_only_notes");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 677 |     let _ = track.set_name("Challenge_only_notes");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> musical_cryptogram/src/lib.rs:678:5
[INFO] [stdout]     |
[INFO] [stdout] 678 |     track.set_general_midi(channel, GeneralMidi::ElectricGrandPiano);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 678 |     let _ = track.set_general_midi(channel, GeneralMidi::ElectricGrandPiano);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.78s
[INFO] running `Command { std: "docker" "inspect" "08c4791b22f4e5a3c837bf3b2ca9a2e97254249419db75fd3947ad382a39473b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c4791b22f4e5a3c837bf3b2ca9a2e97254249419db75fd3947ad382a39473b", kill_on_drop: false }`
[INFO] [stdout] 08c4791b22f4e5a3c837bf3b2ca9a2e97254249419db75fd3947ad382a39473b