[INFO] updating cached repository https://github.com/JRegimbal/luhn-algorithm
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ec7c175e18f72c9a8966794afdfe2d1792112d8
[INFO] checking JRegimbal/luhn-algorithm against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJRegimbal%2Fluhn-algorithm" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JRegimbal/luhn-algorithm on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/JRegimbal/luhn-algorithm
[INFO] finished tweaking git repo https://github.com/JRegimbal/luhn-algorithm
[INFO] tweaked toml for git repo https://github.com/JRegimbal/luhn-algorithm written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/JRegimbal/luhn-algorithm already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: path `/workspace/builds/worker-7/source/src/luhn.rs` was erroneously implicitly accepted for library `luhn`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 6ddff475b12d8e4b3521a25954d5b31e98b95ef5f20a09b286f26126f49809b5
[INFO] running `"docker" "start" "-a" "6ddff475b12d8e4b3521a25954d5b31e98b95ef5f20a09b286f26126f49809b5"`
[INFO] [stderr] warning: path `/opt/rustwide/workdir/src/luhn.rs` was erroneously implicitly accepted for library `luhn`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking luhn_check v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `luhn_valid`
[INFO] [stderr]   --> src/luhn.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn luhn_valid(raw_input: &String) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `luhn_valid`
[INFO] [stderr]   --> src/luhn.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn luhn_valid(raw_input: &String) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "6ddff475b12d8e4b3521a25954d5b31e98b95ef5f20a09b286f26126f49809b5"`
[INFO] running `"docker" "rm" "-f" "6ddff475b12d8e4b3521a25954d5b31e98b95ef5f20a09b286f26126f49809b5"`
[INFO] [stdout] 6ddff475b12d8e4b3521a25954d5b31e98b95ef5f20a09b286f26126f49809b5