[INFO] cloning repository https://github.com/s5003597/rDNS
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/s5003597/rDNS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs5003597%2FrDNS"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs5003597%2FrDNS'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 651ca6e5bb8a4640539d894c7f1a7ee064939cd2
[INFO] checking s5003597/rDNS against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs5003597%2FrDNS" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/s5003597/rDNS on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/s5003597/rDNS
[INFO] finished tweaking git repo https://github.com/s5003597/rDNS
[INFO] tweaked toml for git repo https://github.com/s5003597/rDNS written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/s5003597/rDNS already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 1392ce9feaa2f77d34b3cd10d43cc18a9c876d6e3fe3a6db6e8e2fff8ca91952
[INFO] running `"docker" "start" "-a" "1392ce9feaa2f77d34b3cd10d43cc18a9c876d6e3fe3a6db6e8e2fff8ca91952"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rdns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/main.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn test_2() {
[INFO] [stderr]    | ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/main.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn test_2() {
[INFO] [stderr]    | ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.11s
[INFO] running `"docker" "inspect" "1392ce9feaa2f77d34b3cd10d43cc18a9c876d6e3fe3a6db6e8e2fff8ca91952"`
[INFO] running `"docker" "rm" "-f" "1392ce9feaa2f77d34b3cd10d43cc18a9c876d6e3fe3a6db6e8e2fff8ca91952"`
[INFO] [stdout] 1392ce9feaa2f77d34b3cd10d43cc18a9c876d6e3fe3a6db6e8e2fff8ca91952