[INFO] cloning repository https://github.com/wangyanyu1817/ipcserialtest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wangyanyu1817/ipcserialtest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangyanyu1817%2Fipcserialtest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangyanyu1817%2Fipcserialtest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b88e3d8fdd7adf8815d78bd76b41684249718416
[INFO] checking wangyanyu1817/ipcserialtest against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangyanyu1817%2Fipcserialtest" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangyanyu1817/ipcserialtest on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangyanyu1817/ipcserialtest
[INFO] finished tweaking git repo https://github.com/wangyanyu1817/ipcserialtest
[INFO] tweaked toml for git repo https://github.com/wangyanyu1817/ipcserialtest written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wangyanyu1817/ipcserialtest 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded once_cell v1.12.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2ac70228982169f92d552069042c90dda93b6f07db252d703c1945b4897e89e
[INFO] running `Command { std: "docker" "start" "-a" "e2ac70228982169f92d552069042c90dda93b6f07db252d703c1945b4897e89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2ac70228982169f92d552069042c90dda93b6f07db252d703c1945b4897e89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2ac70228982169f92d552069042c90dda93b6f07db252d703c1945b4897e89e", kill_on_drop: false }`
[INFO] [stdout] e2ac70228982169f92d552069042c90dda93b6f07db252d703c1945b4897e89e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 625cddb9367207575afde50c82ac395b37bfeec84ef4c0b1f7de57e439103dd6
[INFO] running `Command { std: "docker" "start" "-a" "625cddb9367207575afde50c82ac395b37bfeec84ef4c0b1f7de57e439103dd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.96
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[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
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[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling futures-util v0.3.21
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[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]     Checking os_str_bytes v6.1.0
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[INFO] [stderr]     Checking byteorder v1.4.3
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[INFO] [stderr]     Checking serialport v4.2.0
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[INFO] [stdout] warning: value assigned to `handler` is never read
[INFO] [stdout]    --> src/main.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let mut handler: Vec<thread::JoinHandle<()>> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id_cnt` is never read
[INFO] [stdout]   --> src/modbus_slave.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub(crate) struct MbServer {
[INFO] [stdout]    |                   -------- field in this struct
[INFO] [stdout] 23 |     rx: Arc<Mutex<Receiver<Option<(usize, Vec<NodeStat>)>>>>,
[INFO] [stdout] 24 |     id_cnt: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `handler` is never read
[INFO] [stdout]    --> src/main.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let mut handler: Vec<thread::JoinHandle<()>> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id_cnt` is never read
[INFO] [stdout]   --> src/modbus_slave.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub(crate) struct MbServer {
[INFO] [stdout]    |                   -------- field in this struct
[INFO] [stdout] 23 |     rx: Arc<Mutex<Receiver<Option<(usize, Vec<NodeStat>)>>>>,
[INFO] [stdout] 24 |     id_cnt: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.36s
[INFO] running `Command { std: "docker" "inspect" "625cddb9367207575afde50c82ac395b37bfeec84ef4c0b1f7de57e439103dd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "625cddb9367207575afde50c82ac395b37bfeec84ef4c0b1f7de57e439103dd6", kill_on_drop: false }`
[INFO] [stdout] 625cddb9367207575afde50c82ac395b37bfeec84ef4c0b1f7de57e439103dd6