[INFO] cloning repository https://github.com/jmacdonald/bright
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jmacdonald/bright" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacdonald%2Fbright", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacdonald%2Fbright'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 13c238822530040ee171ae27a1d266eea7cea84d
[INFO] checking jmacdonald/bright against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacdonald%2Fbright" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmacdonald/bright on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jmacdonald/bright
[INFO] finished tweaking git repo https://github.com/jmacdonald/bright
[INFO] tweaked toml for git repo https://github.com/jmacdonald/bright written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jmacdonald/bright already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b113d53e608190f204a16034086c610e7a4a3dbdcb34626184151d4b3dbdfe64
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b113d53e608190f204a16034086c610e7a4a3dbdcb34626184151d4b3dbdfe64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b113d53e608190f204a16034086c610e7a4a3dbdcb34626184151d4b3dbdfe64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b113d53e608190f204a16034086c610e7a4a3dbdcb34626184151d4b3dbdfe64", kill_on_drop: false }`
[INFO] [stdout] b113d53e608190f204a16034086c610e7a4a3dbdcb34626184151d4b3dbdfe64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 243fcad9237d2d3d355d187e0514d59ffa0a7d8af616bf6333b232290d4406d6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "243fcad9237d2d3d355d187e0514d59ffa0a7d8af616bf6333b232290d4406d6", kill_on_drop: false }`
[INFO] [stderr]     Checking bright v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/actual_brightness"))
[INFO] [stdout] 26 | |         .expect("Couldn't read current brightness.")
[INFO] [stdout] 27 | |         .read_to_string(&mut current_brightness);
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/actual_brightness"))
[INFO] [stdout] 26 | |         .expect("Couldn't read current brightness.")
[INFO] [stdout] 27 | |         .read_to_string(&mut current_brightness);
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/max_brightness"))
[INFO] [stdout] 37 | |         .expect("Couldn't read max brightness.")
[INFO] [stdout] 38 | |         .read_to_string(&mut max_brightness);
[INFO] [stdout]    | |_____________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/max_brightness"))
[INFO] [stdout] 37 | |         .expect("Couldn't read max brightness.")
[INFO] [stdout] 38 | |         .read_to_string(&mut max_brightness);
[INFO] [stdout]    | |_____________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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 [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "243fcad9237d2d3d355d187e0514d59ffa0a7d8af616bf6333b232290d4406d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "243fcad9237d2d3d355d187e0514d59ffa0a7d8af616bf6333b232290d4406d6", kill_on_drop: false }`
[INFO] [stdout] 243fcad9237d2d3d355d187e0514d59ffa0a7d8af616bf6333b232290d4406d6