[INFO] cloning repository https://github.com/jmcelwain/the_linux_programming_interface
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jmcelwain/the_linux_programming_interface" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmcelwain%2Fthe_linux_programming_interface", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmcelwain%2Fthe_linux_programming_interface'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20d87244e4a21b0c11f1818de6e85d89b1648b19
[INFO] checking jmcelwain/the_linux_programming_interface against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmcelwain%2Fthe_linux_programming_interface" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmcelwain/the_linux_programming_interface on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-7/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bfc05f7a2e98057a2173497e684ea4434d8ff847c78231e4f585e872845c02e7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bfc05f7a2e98057a2173497e684ea4434d8ff847c78231e4f585e872845c02e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfc05f7a2e98057a2173497e684ea4434d8ff847c78231e4f585e872845c02e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfc05f7a2e98057a2173497e684ea4434d8ff847c78231e4f585e872845c02e7", kill_on_drop: false }`
[INFO] [stdout] bfc05f7a2e98057a2173497e684ea4434d8ff847c78231e4f585e872845c02e7
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af1d457904e272802728c163d137fcdf028551cfeeb16099f5f0442f2fe1fe43
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "af1d457904e272802728c163d137fcdf028551cfeeb16099f5f0442f2fe1fe43", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking linux_interface v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `to_path`
[INFO] [stdout]  --> src/fileio/copy.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let to_path = Path::new(to);
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_to_path`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]  --> src/fileio/copy.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let file = match File::open(&from) {
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copy`
[INFO] [stdout]  --> src/fileio/copy.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn copy(from: &String, to: &String) {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to_path`
[INFO] [stdout]  --> src/fileio/copy.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let to_path = Path::new(to);
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_to_path`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]  --> src/fileio/copy.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let file = match File::open(&from) {
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copy`
[INFO] [stdout]  --> src/fileio/copy.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn copy(from: &String, to: &String) {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "af1d457904e272802728c163d137fcdf028551cfeeb16099f5f0442f2fe1fe43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af1d457904e272802728c163d137fcdf028551cfeeb16099f5f0442f2fe1fe43", kill_on_drop: false }`
[INFO] [stdout] af1d457904e272802728c163d137fcdf028551cfeeb16099f5f0442f2fe1fe43