[INFO] cloning repository https://github.com/ktims/mqtt-exporter-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ktims/mqtt-exporter-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktims%2Fmqtt-exporter-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktims%2Fmqtt-exporter-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3085e38dfd868c77f5d33fe3d676d21f77b9a305
[INFO] checking ktims/mqtt-exporter-rs against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktims%2Fmqtt-exporter-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/ktims/mqtt-exporter-rs
[INFO] finished tweaking git repo https://github.com/ktims/mqtt-exporter-rs
[INFO] tweaked toml for git repo https://github.com/ktims/mqtt-exporter-rs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ktims/mqtt-exporter-rs on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ktims/mqtt-exporter-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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded metrics-util v0.19.0
[INFO] [stderr]   Downloaded quanta v0.12.5
[INFO] [stderr]   Downloaded ordered-float v4.5.0
[INFO] [stderr]   Downloaded metrics v0.24.1
[INFO] [stderr]   Downloaded metrics-exporter-prometheus v0.16.2
[INFO] [stderr]   Downloaded config v0.15.9
[INFO] [stderr]   Downloaded rumqttc v0.24.0
[INFO] [stderr]   Downloaded prettyplease v0.2.30
[INFO] [stderr]   Downloaded yaml-rust2 v0.10.0
[INFO] [stderr]   Downloaded aws-lc-rs v1.12.5
[INFO] [stderr]   Downloaded tokio v1.44.0
[INFO] [stderr]   Downloaded ring v0.17.13
[INFO] [stderr]   Downloaded aws-lc-sys v0.26.0
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fccdf5dba7f1998d351fa1c0f5b7dc93d28759053940440df5c1cbc13d274010
[INFO] running `Command { std: "docker" "start" "-a" "fccdf5dba7f1998d351fa1c0f5b7dc93d28759053940440df5c1cbc13d274010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fccdf5dba7f1998d351fa1c0f5b7dc93d28759053940440df5c1cbc13d274010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fccdf5dba7f1998d351fa1c0f5b7dc93d28759053940440df5c1cbc13d274010", kill_on_drop: false }`
[INFO] [stdout] fccdf5dba7f1998d351fa1c0f5b7dc93d28759053940440df5c1cbc13d274010
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7998cf0703247ee3920e23dff140938f59676b7dec8506e53f05329686e0911e
[INFO] running `Command { std: "docker" "start" "-a" "7998cf0703247ee3920e23dff140938f59676b7dec8506e53f05329686e0911e", kill_on_drop: false }`
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[INFO] [stderr]     Checking metrics-util v0.19.0
[INFO] [stderr]     Checking hyper-util v0.1.10
[INFO] [stderr]     Checking toml v0.8.20
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[INFO] [stderr]     Checking rumqttc v0.24.0
[INFO] [stderr]     Checking metrics-exporter-prometheus v0.16.2
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:387:18
[INFO] [stdout]     |
[INFO] [stdout] 387 |     let (client, mut eventloop) = AsyncClient::new(opts, 10);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:387:18
[INFO] [stdout]     |
[INFO] [stdout] 387 |     let (client, mut eventloop) = AsyncClient::new(opts, 10);
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 55s
[INFO] running `Command { std: "docker" "inspect" "7998cf0703247ee3920e23dff140938f59676b7dec8506e53f05329686e0911e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7998cf0703247ee3920e23dff140938f59676b7dec8506e53f05329686e0911e", kill_on_drop: false }`
[INFO] [stdout] 7998cf0703247ee3920e23dff140938f59676b7dec8506e53f05329686e0911e