[INFO] updating cached repository https://github.com/jmacdonald/bright
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] testing jmacdonald/bright against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacdonald%2Fbright" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmacdonald/bright on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "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 work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jmacdonald/bright already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] a5b9a0d283ba9609273f3779c56b5649f5ac4920acc1bbeb305190ed398f3fdc
[INFO] running `"docker" "start" "-a" "a5b9a0d283ba9609273f3779c56b5649f5ac4920acc1bbeb305190ed398f3fdc"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "a5b9a0d283ba9609273f3779c56b5649f5ac4920acc1bbeb305190ed398f3fdc"`
[INFO] running `"docker" "rm" "-f" "a5b9a0d283ba9609273f3779c56b5649f5ac4920acc1bbeb305190ed398f3fdc"`
[INFO] [stdout] a5b9a0d283ba9609273f3779c56b5649f5ac4920acc1bbeb305190ed398f3fdc
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ed6515f6a2e640f8aba2794657e27905841d5fba92d5c83a3fb8f56f8cf21797
[INFO] running `"docker" "start" "-a" "ed6515f6a2e640f8aba2794657e27905841d5fba92d5c83a3fb8f56f8cf21797"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "ed6515f6a2e640f8aba2794657e27905841d5fba92d5c83a3fb8f56f8cf21797"`
[INFO] running `"docker" "rm" "-f" "ed6515f6a2e640f8aba2794657e27905841d5fba92d5c83a3fb8f56f8cf21797"`
[INFO] [stdout] ed6515f6a2e640f8aba2794657e27905841d5fba92d5c83a3fb8f56f8cf21797
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] ecfdf66a8a03fb006915364c0e3f5701d5f59bb09d9d2261e5d9ec216b9985fe
[INFO] running `"docker" "start" "-a" "ecfdf66a8a03fb006915364c0e3f5701d5f59bb09d9d2261e5d9ec216b9985fe"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/bright-a25c60a96c678660
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ecfdf66a8a03fb006915364c0e3f5701d5f59bb09d9d2261e5d9ec216b9985fe"`
[INFO] running `"docker" "rm" "-f" "ecfdf66a8a03fb006915364c0e3f5701d5f59bb09d9d2261e5d9ec216b9985fe"`
[INFO] [stdout] ecfdf66a8a03fb006915364c0e3f5701d5f59bb09d9d2261e5d9ec216b9985fe