[INFO] cloning repository https://github.com/Rheydskey/cat-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Rheydskey/cat-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRheydskey%2Fcat-rust"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRheydskey%2Fcat-rust'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c67ebde71db11372b28cb313686df7d476351b8b
[INFO] checking Rheydskey/cat-rust against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRheydskey%2Fcat-rust" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Rheydskey/cat-rust 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/Rheydskey/cat-rust
[INFO] finished tweaking git repo https://github.com/Rheydskey/cat-rust
[INFO] tweaked toml for git repo https://github.com/Rheydskey/cat-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Rheydskey/cat-rust 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 4b8fa89cd30e49e8351127b678ab9bc035a8900e940ff6d612f230b7ceca5c76
[INFO] running `"docker" "start" "-a" "4b8fa89cd30e49e8351127b678ab9bc035a8900e940ff6d612f230b7ceca5c76"`
[INFO] [stderr]     Checking cat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]   --> src/main.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut file = File::open(&arg)?.read_to_string(&mut contents)?;
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut file = File::open(&arg)?.read_to_string(&mut contents)?;
[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: unused variable: `file`
[INFO] [stderr]   --> src/main.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut file = File::open(&arg)?.read_to_string(&mut contents)?;
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut file = File::open(&arg)?.read_to_string(&mut contents)?;
[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 0.41s
[INFO] running `"docker" "inspect" "4b8fa89cd30e49e8351127b678ab9bc035a8900e940ff6d612f230b7ceca5c76"`
[INFO] running `"docker" "rm" "-f" "4b8fa89cd30e49e8351127b678ab9bc035a8900e940ff6d612f230b7ceca5c76"`
[INFO] [stdout] 4b8fa89cd30e49e8351127b678ab9bc035a8900e940ff6d612f230b7ceca5c76