[INFO] cloning repository https://github.com/tncrazvan/RustFirst
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tncrazvan/RustFirst" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftncrazvan%2FRustFirst"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftncrazvan%2FRustFirst'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 92444466adda88733b65be3c220b25eacf95c7db
[INFO] checking tncrazvan/RustFirst against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftncrazvan%2FRustFirst" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tncrazvan/RustFirst on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tncrazvan/RustFirst
[INFO] finished tweaking git repo https://github.com/tncrazvan/RustFirst
[INFO] tweaked toml for git repo https://github.com/tncrazvan/RustFirst written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/tncrazvan/RustFirst already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+914adf04af1c1a984707f778da3d04590c03d144" "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] fe38e9d765cd217e0f3f8b40336ae9dc32af51cd63b1d0b846f770abc8b69f8d
[INFO] running `"docker" "start" "-a" "fe38e9d765cd217e0f3f8b40336ae9dc32af51cd63b1d0b846f770abc8b69f8d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: associated function is never used: `to_tuple`
[INFO] [stderr]   --> src/structs.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn to_tuple(self) -> (String, String){
[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: associated function is never used: `to_tuple`
[INFO] [stderr]   --> src/structs.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn to_tuple(self) -> (String, String){
[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 0.25s
[INFO] running `"docker" "inspect" "fe38e9d765cd217e0f3f8b40336ae9dc32af51cd63b1d0b846f770abc8b69f8d"`
[INFO] running `"docker" "rm" "-f" "fe38e9d765cd217e0f3f8b40336ae9dc32af51cd63b1d0b846f770abc8b69f8d"`
[INFO] [stdout] fe38e9d765cd217e0f3f8b40336ae9dc32af51cd63b1d0b846f770abc8b69f8d