[INFO] updating cached repository https://github.com/jmacdonald/bright
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 13c238822530040ee171ae27a1d266eea7cea84d
[INFO] checking jmacdonald/bright against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacdonald%2Fbright" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmacdonald/bright on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jmacdonald/bright already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6f00a473aa954135d984cecf56f6a35b36e424ebfe340a4a9c0fa42111e66018
[INFO] running `"docker" "start" "-a" "6f00a473aa954135d984cecf56f6a35b36e424ebfe340a4a9c0fa42111e66018"`
[INFO] [stderr]     Checking bright v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/actual_brightness"))
[INFO] [stderr] 26 | |         .expect("Couldn't read current brightness.")
[INFO] [stderr] 27 | |         .read_to_string(&mut current_brightness);
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/max_brightness"))
[INFO] [stderr] 37 | |         .expect("Couldn't read max brightness.")
[INFO] [stderr] 38 | |         .read_to_string(&mut max_brightness);
[INFO] [stderr]    | |_____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/actual_brightness"))
[INFO] [stderr] 26 | |         .expect("Couldn't read current brightness.")
[INFO] [stderr] 27 | |         .read_to_string(&mut current_brightness);
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     File::open(Path::new("/sys/class/backlight/intel_backlight/max_brightness"))
[INFO] [stderr] 37 | |         .expect("Couldn't read max brightness.")
[INFO] [stderr] 38 | |         .read_to_string(&mut max_brightness);
[INFO] [stderr]    | |_____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "6f00a473aa954135d984cecf56f6a35b36e424ebfe340a4a9c0fa42111e66018"`
[INFO] running `"docker" "rm" "-f" "6f00a473aa954135d984cecf56f6a35b36e424ebfe340a4a9c0fa42111e66018"`
[INFO] [stdout] 6f00a473aa954135d984cecf56f6a35b36e424ebfe340a4a9c0fa42111e66018