[INFO] cloning repository https://github.com/cassaundra/backlight
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cassaundra/backlight" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Fbacklight"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Fbacklight'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 36bd9a0740ad2737fdf5554396abb750a67b3114
[INFO] checking cassaundra/backlight against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Fbacklight" "/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/cassaundra/backlight on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cassaundra/backlight
[INFO] finished tweaking git repo https://github.com/cassaundra/backlight
[INFO] tweaked toml for git repo https://github.com/cassaundra/backlight written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/cassaundra/backlight already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 212221b9a0577fe83871f3bf552fdd3c5549b93b1c35eb23fb70ef21220b194c
[INFO] running `"docker" "start" "-a" "212221b9a0577fe83871f3bf552fdd3c5549b93b1c35eb23fb70ef21220b194c"`
[INFO] [stderr]    Compiling scrap v0.5.0
[INFO] [stderr]     Checking portmidi v0.2.4
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]     Checking launchpad v1.0.0 (https://github.com/cassaundra/launch-rs.git#105cf8ef)
[INFO] [stderr]     Checking backlight v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/main.rs:35:7
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let count = (buffer.len() / 4) as u128;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     launchpad.light_all_raw(0);
[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:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 launchpad.light_single(7 - pad_x as u8, 7 - pad_y as u8, &color);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/main.rs:35:7
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let count = (buffer.len() / 4) as u128;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     launchpad.light_all_raw(0);
[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:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 launchpad.light_single(7 - pad_x as u8, 7 - pad_y as u8, &color);
[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 26.34s
[INFO] running `"docker" "inspect" "212221b9a0577fe83871f3bf552fdd3c5549b93b1c35eb23fb70ef21220b194c"`
[INFO] running `"docker" "rm" "-f" "212221b9a0577fe83871f3bf552fdd3c5549b93b1c35eb23fb70ef21220b194c"`
[INFO] [stdout] 212221b9a0577fe83871f3bf552fdd3c5549b93b1c35eb23fb70ef21220b194c