[INFO] updating cached repository https://github.com/jmcelwain/the_linux_programming_interface
[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] 20d87244e4a21b0c11f1818de6e85d89b1648b19
[INFO] checking jmcelwain/the_linux_programming_interface against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmcelwain%2Fthe_linux_programming_interface" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmcelwain/the_linux_programming_interface 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/jmcelwain/the_linux_programming_interface
[INFO] finished tweaking git repo https://github.com/jmcelwain/the_linux_programming_interface
[INFO] tweaked toml for git repo https://github.com/jmcelwain/the_linux_programming_interface written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/jmcelwain/the_linux_programming_interface 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] c124a6487605bce729b291dbb9451f29d488dc95b0225a0d5d83d9e194b552ae
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c124a6487605bce729b291dbb9451f29d488dc95b0225a0d5d83d9e194b552ae"`
[INFO] [stderr]     Checking linux_interface v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `to_path`
[INFO] [stderr]  --> src/fileio/copy.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let to_path = Path::new(to);
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_to_path`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]  --> src/fileio/copy.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let file = match File::open(&from) {
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy`
[INFO] [stderr]  --> src/fileio/copy.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn copy(from: &String, to: &String) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to_path`
[INFO] [stderr]  --> src/fileio/copy.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let to_path = Path::new(to);
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_to_path`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]  --> src/fileio/copy.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let file = match File::open(&from) {
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy`
[INFO] [stderr]  --> src/fileio/copy.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn copy(from: &String, to: &String) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "c124a6487605bce729b291dbb9451f29d488dc95b0225a0d5d83d9e194b552ae"`
[INFO] running `"docker" "rm" "-f" "c124a6487605bce729b291dbb9451f29d488dc95b0225a0d5d83d9e194b552ae"`
[INFO] [stdout] c124a6487605bce729b291dbb9451f29d488dc95b0225a0d5d83d9e194b552ae