[INFO] cloning repository https://github.com/Rorgon/raytracer-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Rorgon/raytracer-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRorgon%2Fraytracer-rs"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRorgon%2Fraytracer-rs'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 667dc5e7c6540d199f2d4810d9f9075c0087f0fb
[INFO] checking Rorgon/raytracer-rs against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRorgon%2Fraytracer-rs" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Rorgon/raytracer-rs on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Rorgon/raytracer-rs
[INFO] finished tweaking git repo https://github.com/Rorgon/raytracer-rs
[INFO] tweaked toml for git repo https://github.com/Rorgon/raytracer-rs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Rorgon/raytracer-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+13f916f63bc6575d5ff1f989237dfabe88981368" "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] 4dae5fbec00e77cbc465813dc17773d3924f04c86592d1916b03737df48a608f
[INFO] running `"docker" "start" "-a" "4dae5fbec00e77cbc465813dc17773d3924f04c86592d1916b03737df48a608f"`
[INFO] [stderr]     Checking png v0.16.1
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking image v0.23.1
[INFO] [stderr]     Checking raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/image/png.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut buffer = fs::File::create(filename).unwrap();
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/image/png.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut buffer = fs::File::create(filename).unwrap();
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.14s
[INFO] running `"docker" "inspect" "4dae5fbec00e77cbc465813dc17773d3924f04c86592d1916b03737df48a608f"`
[INFO] running `"docker" "rm" "-f" "4dae5fbec00e77cbc465813dc17773d3924f04c86592d1916b03737df48a608f"`
[INFO] [stdout] 4dae5fbec00e77cbc465813dc17773d3924f04c86592d1916b03737df48a608f