[INFO] cloning repository https://github.com/stuffincode/midair
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stuffincode/midair" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstuffincode%2Fmidair", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstuffincode%2Fmidair'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a1834ce2bdd6140243e1acf6f14ba7cd8ef11cf
[INFO] checking stuffincode/midair against master#f9515fdd5aa132e27d9b580a35b27f4b453251c1 for pr-125923
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstuffincode%2Fmidair" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stuffincode/midair on toolchain f9515fdd5aa132e27d9b580a35b27f4b453251c1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stuffincode/midair
[INFO] finished tweaking git repo https://github.com/stuffincode/midair
[INFO] tweaked toml for git repo https://github.com/stuffincode/midair written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/stuffincode/midair 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" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9c2d55440c08db1fe89d5fe391c7c427f3f7ec68800891b22cccb974c80f7357
[INFO] running `Command { std: "docker" "start" "-a" "9c2d55440c08db1fe89d5fe391c7c427f3f7ec68800891b22cccb974c80f7357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c2d55440c08db1fe89d5fe391c7c427f3f7ec68800891b22cccb974c80f7357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c2d55440c08db1fe89d5fe391c7c427f3f7ec68800891b22cccb974c80f7357", kill_on_drop: false }`
[INFO] [stdout] 9c2d55440c08db1fe89d5fe391c7c427f3f7ec68800891b22cccb974c80f7357
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f9515fdd5aa132e27d9b580a35b27f4b453251c1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 332f7e832115e2267b2f646d89f214d9c95127904d5240e73119425d1c946dd1
[INFO] running `Command { std: "docker" "start" "-a" "332f7e832115e2267b2f646d89f214d9c95127904d5240e73119425d1c946dd1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking alsa v0.7.1
[INFO] [stderr]     Checking midir v0.9.1
[INFO] [stderr]     Checking midair v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/main.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{channel, Receiver};
[INFO] [stdout]   |                                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/main.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{channel, Receiver};
[INFO] [stdout]   |                                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `in_conn`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let in_conn = midi_in.connect(in_port, "midir-test-in", move |_, message, _| {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_in_conn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `in_conn`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let in_conn = midi_in.connect(in_port, "midir-test-in", move |_, message, _| {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_in_conn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.76s
[INFO] running `Command { std: "docker" "inspect" "332f7e832115e2267b2f646d89f214d9c95127904d5240e73119425d1c946dd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "332f7e832115e2267b2f646d89f214d9c95127904d5240e73119425d1c946dd1", kill_on_drop: false }`
[INFO] [stdout] 332f7e832115e2267b2f646d89f214d9c95127904d5240e73119425d1c946dd1