[INFO] fetching crate desktop2mqtt 0.2.0...
[INFO] checking desktop2mqtt-0.2.0 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate desktop2mqtt 0.2.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate desktop2mqtt 0.2.0 on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate desktop2mqtt 0.2.0
[INFO] finished tweaking crates.io crate desktop2mqtt 0.2.0
[INFO] tweaked toml for crates.io crate desktop2mqtt 0.2.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate crates.io crate desktop2mqtt 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "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 humantime-serde v1.0.1
[INFO] [stderr]   Downloaded notify-rust v4.5.2
[INFO] [stderr]   Downloaded systemstat v0.1.8
[INFO] [stderr]   Downloaded mqttrs v0.2.0
[INFO] [stderr]   Downloaded user-idle v0.4.0
[INFO] [stderr]   Downloaded mqtt-async-client v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aae3123a191d3ef16499ecc83309e721c6da34f71147c95adc8fc71f694eec46
[INFO] running `Command { std: "docker" "start" "-a" "aae3123a191d3ef16499ecc83309e721c6da34f71147c95adc8fc71f694eec46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aae3123a191d3ef16499ecc83309e721c6da34f71147c95adc8fc71f694eec46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aae3123a191d3ef16499ecc83309e721c6da34f71147c95adc8fc71f694eec46", kill_on_drop: false }`
[INFO] [stdout] aae3123a191d3ef16499ecc83309e721c6da34f71147c95adc8fc71f694eec46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0af69055fc3a5c1f4ac9079e42d301a05ab8e751b81b1156880c64736381fa25
[INFO] running `Command { std: "docker" "start" "-a" "0af69055fc3a5c1f4ac9079e42d301a05ab8e751b81b1156880c64736381fa25", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
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[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking cfg-if v1.0.0
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[INFO] [stderr]    Compiling enumflags2_derive v0.6.4
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[INFO] [stderr]    Compiling derivative v2.2.0
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[INFO] [stderr]     Checking structopt v0.3.21
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[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking tokio-rustls v0.22.0
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[INFO] [stderr]     Checking enumflags2 v0.6.4
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking humantime-serde v1.0.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
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[INFO] [stderr]     Checking desktop2mqtt v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `MAX_BRIGHTNESS`
[INFO] [stdout]   --> src/modules/backlight/raspberry_pi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | const MAX_BRIGHTNESS: &str = "max_brightness";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_BRIGHTNESS`
[INFO] [stdout]   --> src/modules/backlight/raspberry_pi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | const MAX_BRIGHTNESS: &str = "max_brightness";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.63s
[INFO] running `Command { std: "docker" "inspect" "0af69055fc3a5c1f4ac9079e42d301a05ab8e751b81b1156880c64736381fa25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0af69055fc3a5c1f4ac9079e42d301a05ab8e751b81b1156880c64736381fa25", kill_on_drop: false }`
[INFO] [stdout] 0af69055fc3a5c1f4ac9079e42d301a05ab8e751b81b1156880c64736381fa25