[INFO] cloning repository https://github.com/flyaruu/rust-uart
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flyaruu/rust-uart" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflyaruu%2Frust-uart", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflyaruu%2Frust-uart'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 531f0b7a464905b8714f2912a38b806d63aa2ba9
[INFO] checking flyaruu/rust-uart against try#4e55a504843955c97eb06907c71f6f3e99208021 for pr-146978
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflyaruu%2Frust-uart" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/flyaruu/rust-uart
[INFO] finished tweaking git repo https://github.com/flyaruu/rust-uart
[INFO] tweaked toml for git repo https://github.com/flyaruu/rust-uart written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/flyaruu/rust-uart on toolchain 4e55a504843955c97eb06907c71f6f3e99208021
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/flyaruu/rust-uart 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" "+4e55a504843955c97eb06907c71f6f3e99208021" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serialport v4.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 344fa6e3db2a52d23c604e840c362c98e28358a8bbf0ae3521defe45939df5d5
[INFO] running `Command { std: "docker" "start" "-a" "344fa6e3db2a52d23c604e840c362c98e28358a8bbf0ae3521defe45939df5d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "344fa6e3db2a52d23c604e840c362c98e28358a8bbf0ae3521defe45939df5d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "344fa6e3db2a52d23c604e840c362c98e28358a8bbf0ae3521defe45939df5d5", kill_on_drop: false }`
[INFO] [stdout] 344fa6e3db2a52d23c604e840c362c98e28358a8bbf0ae3521defe45939df5d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dcdf766efbaa05383419c2164fb782a1f5cdac6c3f13b11e0d20dfdb4bc3bc7
[INFO] running `Command { std: "docker" "start" "-a" "6dcdf766efbaa05383419c2164fb782a1f5cdac6c3f13b11e0d20dfdb4bc3bc7", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]     Checking libudev-sys v0.1.4
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking libudev v0.3.0
[INFO] [stderr]    Compiling syn v2.0.68
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]     Checking thiserror v1.0.61
[INFO] [stderr]     Checking unescaper v0.1.5
[INFO] [stderr]     Checking serialport v4.4.0
[INFO] [stderr]     Checking rust-uart v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut port = serialport::new("/dev/cu.usbserial-0001", 9600)
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STOP` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const STOP: [u8;3] = [0xAA,0x04,0x00];
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `stop` is never used
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Dysv17f {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn stop(&mut self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut port = serialport::new("/dev/cu.usbserial-0001", 9600)
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STOP` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const STOP: [u8;3] = [0xAA,0x04,0x00];
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `stop` is never used
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Dysv17f {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn stop(&mut self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "6dcdf766efbaa05383419c2164fb782a1f5cdac6c3f13b11e0d20dfdb4bc3bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dcdf766efbaa05383419c2164fb782a1f5cdac6c3f13b11e0d20dfdb4bc3bc7", kill_on_drop: false }`
[INFO] [stdout] 6dcdf766efbaa05383419c2164fb782a1f5cdac6c3f13b11e0d20dfdb4bc3bc7
