[INFO] updating cached repository https://github.com/Vanille-N/Sudoku-Solver
[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] [stderr] From https://github.com/Vanille-N/Sudoku-Solver
[INFO] [stderr]    5164e55..123e01d  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 123e01d7391560a7a76bf9fa184f2d0129a160df
[INFO] checking Vanille-N/Sudoku-Solver against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVanille-N%2FSudoku-Solver" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vanille-N/Sudoku-Solver on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Vanille-N/Sudoku-Solver
[INFO] finished tweaking git repo https://github.com/Vanille-N/Sudoku-Solver
[INFO] tweaked toml for git repo https://github.com/Vanille-N/Sudoku-Solver written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Vanille-N/Sudoku-Solver already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "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] d5ffc13af6966aae4309e5ba749d5c80e3158a267eea29623da97af0ef230d94
[INFO] running `"docker" "start" "-a" "d5ffc13af6966aae4309e5ba749d5c80e3158a267eea29623da97af0ef230d94"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking arrayvec v0.4.12
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking sudoku_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `main_sequential`
[INFO] [stderr]    --> src/main.rs:249:4
[INFO] [stderr]     |
[INFO] [stderr] 249 | fn main_sequential() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_vec`
[INFO] [stderr]    --> src/main.rs:276:4
[INFO] [stderr]     |
[INFO] [stderr] 276 | fn main_vec() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_scoped_pool`
[INFO] [stderr]    --> src/main.rs:313:4
[INFO] [stderr]     |
[INFO] [stderr] 313 | fn main_scoped_pool() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_scoped_split`
[INFO] [stderr]    --> src/main.rs:356:4
[INFO] [stderr]     |
[INFO] [stderr] 356 | fn main_scoped_split() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_sequential`
[INFO] [stderr]    --> src/main.rs:249:4
[INFO] [stderr]     |
[INFO] [stderr] 249 | fn main_sequential() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_vec`
[INFO] [stderr]    --> src/main.rs:276:4
[INFO] [stderr]     |
[INFO] [stderr] 276 | fn main_vec() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_scoped_pool`
[INFO] [stderr]    --> src/main.rs:313:4
[INFO] [stderr]     |
[INFO] [stderr] 313 | fn main_scoped_pool() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main_scoped_split`
[INFO] [stderr]    --> src/main.rs:356:4
[INFO] [stderr]     |
[INFO] [stderr] 356 | fn main_scoped_split() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.77s
[INFO] running `"docker" "inspect" "d5ffc13af6966aae4309e5ba749d5c80e3158a267eea29623da97af0ef230d94"`
[INFO] running `"docker" "rm" "-f" "d5ffc13af6966aae4309e5ba749d5c80e3158a267eea29623da97af0ef230d94"`
[INFO] [stdout] d5ffc13af6966aae4309e5ba749d5c80e3158a267eea29623da97af0ef230d94